Maximum and minimum brightness value acquisition system and method

Abstract

The present invention discloses a maximum and minimum brightness value capture system and method. The maximum and minimum brightness value capture system includes a test object carrier device and a chart display device. The test object carrier device is used to carry an image capture module. The chart display device includes a chart display structure. The maximum and minimum brightness value capture method includes: providing a grayscale histogram corresponding to the chart display structure through the maximum and minimum brightness value capture system, providing a pixel number distribution area distributed along the direction of increasing grayscale values ​​from the grayscale histogram, calculating an optimal threshold value of the pixel number distribution area, dividing the pixel number distribution area into a left pixel number distribution area and a right pixel number distribution area through the optimal threshold value, and taking the average grayscale value of the left pixel number distribution area and the average grayscale value of the right pixel number distribution area as the minimum brightness value and the maximum brightness value, respectively.

Description

Technical Field

[0001] The present invention relates to a parameter acquisition system and method, and in particular to a maximum and minimum brightness value acquisition system and method. Background Art

[0002] In the prior art, the image capture module includes a lens holder, a lens structure and an image sensing chip, and the image capture module needs to pass a predetermined chart for optical testing. However, the optical testing system and method in the prior art still have room for improvement. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a maximum and minimum brightness value acquisition system and method in view of the deficiencies of the prior art.

[0004] In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a maximum and minimum brightness value acquisition system, which includes: a test object carrying device and a chart display device. The test object carrying device is used to carry an image acquisition module, and the image acquisition module includes a lens bracket, a lens structure arranged on the lens bracket, and an image sensing chip corresponding to the lens structure. The chart display device includes a chart display structure. Among them, corresponding to the chart display structure, the maximum and minimum brightness value acquisition system is used to obtain multiple MTF values ​​by calculating a modulation transfer function (MTF), and the modulation transfer function conforms to the following formula:

[0005] MTF=[(I max -I min ) / (I max +I min )]×100%,

[0006] Among them I max is the maximum brightness value, I minis the minimum brightness value. The maximum and minimum brightness value acquisition system is used to obtain the maximum brightness value and the minimum brightness value through the first method or the second method. The first method used by the maximum and minimum brightness value acquisition system includes: providing a grayscale histogram corresponding to the chart display structure and a cumulative distribution diagram corresponding to the grayscale histogram through the maximum and minimum brightness value acquisition system, providing a pixel number cumulative distribution area distributed along the direction of increasing grayscale values ​​by the cumulative distribution diagram, and taking the average grayscale value of the first 30% of the pixel number cumulative distribution area and the average grayscale value of the last 30% of the pixel number cumulative distribution area as the minimum brightness value and the maximum brightness value, respectively. Among them, the second method used by the maximum and minimum brightness value capture system includes: providing a grayscale histogram corresponding to the chart display structure through the maximum and minimum brightness value capture system, providing a pixel number allocation area distributed along the direction of increasing grayscale values ​​from the grayscale histogram, calculating an optimal threshold value of the pixel number allocation area, dividing the pixel number allocation area into a left pixel number allocation area and a right pixel number allocation area through the optimal threshold value, and using the average grayscale value of the left pixel number allocation area and the average grayscale value of the right pixel number allocation area as the minimum brightness value and the maximum brightness value, respectively.

[0007] In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a maximum and minimum brightness value acquisition method, which includes: providing a maximum and minimum brightness value acquisition system; and, corresponding to a chart display structure, the maximum and minimum brightness value acquisition system is used to obtain a plurality of MTF values ​​by calculating a modulation transfer function (MTF), and the modulation transfer function conforms to the following formula:

[0008] MTF=[(I max -I min ) / (I max +I min )]×100%,

[0009] Among them I max is the maximum brightness value, I minis the minimum brightness value, and both the maximum brightness value and the minimum brightness value are obtained by the first method or the second method. The first method includes: providing a grayscale histogram corresponding to the chart display structure and a cumulative distribution map corresponding to the grayscale histogram by the maximum and minimum brightness value acquisition system, providing a pixel number cumulative distribution area distributed along the direction of increasing grayscale values ​​by the cumulative distribution map, and taking the average grayscale value of the first 30% of the pixel number cumulative distribution area and the average grayscale value of the last 30% of the pixel number cumulative distribution area as the minimum brightness value and the maximum brightness value respectively. The second method includes: providing a grayscale histogram corresponding to the chart display structure by the maximum and minimum brightness value acquisition system, providing a pixel number distribution area distributed along the direction of increasing grayscale values ​​by the grayscale histogram, calculating an optimal threshold value of the pixel number distribution area, dividing the pixel number distribution area into a left pixel number distribution area and a right pixel number distribution area by the optimal threshold value, and taking the average grayscale value of the left pixel number distribution area and the average grayscale value of the right pixel number distribution area as the minimum brightness value and the maximum brightness value respectively.

[0010] One of the beneficial effects of the present invention is that the present invention provides a maximum and minimum brightness value acquisition system and method, which can be achieved by "using the maximum and minimum brightness value acquisition system to provide a grayscale histogram corresponding to the chart display structure and a cumulative distribution diagram corresponding to the grayscale histogram, and the cumulative distribution diagram provides a pixel number cumulative distribution area distributed along the direction of increasing grayscale values, and the average grayscale value of the first 30% of the pixel number cumulative distribution area and the average grayscale value of the last 30% of the pixel number cumulative distribution area are used as the minimum brightness value and the maximum brightness value respectively" or "using the maximum and minimum brightness value acquisition system to provide a grayscale histogram corresponding to the chart display structure and a cumulative distribution diagram corresponding to the grayscale histogram, and the cumulative distribution diagram provides a pixel number cumulative distribution area distributed along the direction of increasing grayscale values, and the average grayscale value of the first 30% of the pixel number cumulative distribution area and the average grayscale value of the last 30% of the pixel number cumulative distribution area are used as the minimum brightness value and the maximum brightness value respectively" A small brightness value acquisition system is used to provide a grayscale histogram corresponding to a chart display structure, and a pixel number allocation area distributed along a direction of increasing grayscale values ​​is provided by the grayscale histogram, and an optimal threshold value of the pixel number allocation area is calculated. The pixel number allocation area is divided into a left pixel number allocation area and a right pixel number allocation area by the optimal threshold value, and the average grayscale value of the left pixel number allocation area and the average grayscale value of the right pixel number allocation area are used as the minimum brightness value and the maximum brightness value respectively. A technical solution is provided to obtain the minimum brightness value and the maximum brightness value corresponding to the chart display structure.

[0011] To further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings provided are only for reference and description and are not intended to limit the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the maximum and minimum brightness value capturing system provided by the present invention.

[0013] Figure 2 A schematic diagram of a first chart display structure provided by the chart display device of the present invention.

[0014] Figure 3 A grayscale histogram corresponding to the chart display structure is provided for the maximum and minimum brightness value acquisition system of the present invention.

[0015] Figure 4 To correspond to Figure 3 A cumulative distribution diagram of the grayscale histogram.

[0016] Figure 5 for Figure 3 A grayscale histogram of FIG. 1 is a schematic diagram of dividing a pixel number allocation area into a left pixel number allocation area and a right pixel number allocation area by using an optimal threshold.

[0017] Figure 6 A schematic diagram of a second chart display structure provided by the chart display device of the present invention.

[0018] Figure 7 A schematic diagram of a third chart display structure provided by the chart display device of the present invention.

[0019] Figure 8 A schematic diagram of a fourth chart display structure provided by the chart display device of the present invention.

[0020] Fig. 9 It is a flow chart of the maximum and minimum brightness value acquisition method provided by the present invention. DETAILED DESCRIPTION

[0021] The following is an explanation of the implementation methods of the "maximum and minimum brightness value capture system and method" disclosed in the present invention through specific embodiments. Those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and the details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the concept of the present invention. In addition, it should be stated in advance that the drawings of the present invention are only simple schematic illustrations and are not depicted according to actual sizes. The following embodiments will further explain the relevant technical contents of the present invention in detail, but the disclosed contents are not intended to limit the scope of protection of the present invention. In addition, the term "or" used in this article may include any one or more combinations of the associated listed items depending on the actual situation.

[0022] [First embodiment]

[0023] See also Figures 1 to 8As shown, the first embodiment of the present invention provides a maximum and minimum brightness value acquisition system S, which at least comprises: a device 1 for carrying an object to be measured and a chart display device 2 .

[0024] First, cooperate Figure 1 and Figure 2 As shown, the object-carrying device 1 can be used to carry an image capture module M, and the image capture module M includes a lens holder M1, a lens structure M2 disposed on the lens holder M1, and an image sensing chip M3 corresponding to the lens structure M2. In addition, the chart display device 2 includes a chart display structure 21. For example, the chart display structure 21 includes an upper left partition chart 211 (or a chart area of ​​the upper left portion), a lower left partition chart 212 (or a chart area of ​​the lower left portion), an upper right partition chart 213 (or a chart area of ​​the upper right portion), a lower right partition chart 214 (or a chart area of ​​the lower right portion), a middle partition chart 215 (or a middle partial chart area), and a comparison partition chart 216 (or a comparison partial chart area) separated from each other. In addition, the object-carrying device 1 to be tested may be any fixing device or a clamping device that can be used to position or fix the image capture module M, the lens structure M2 may include a protective shell (unnumbered) disposed inside the lens holder M1 and at least one lens (or a lens group consisting of a plurality of lenses, unnumbered) disposed inside the protective shell, and the image sensing chip M3 may be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) sensor. In addition, the chart display device 2 may also include a data processing module 22 (such as a computer microprocessor) electrically connected to the image sensing chip M3 through a circuit substrate (unnumbered) and a chart carrying module (unnumbered) for carrying the chart display structure 21. It is worth noting that, for example Figure 1 As shown, the chart display structure 21 may be composed of a plurality of small square areas, and any one of the upper left partition chart 211, the lower left partition chart 212, the upper right partition chart 213, the lower right partition chart 214, the middle partition chart 215, and the comparison partition chart 216 may include a plurality of complete small square areas or an incomplete plurality of small square areas. However, the above example is only one feasible embodiment and is not intended to limit the present invention.

[0025] Furthermore, cooperation Figure 1 and Figure 2As shown, corresponding to the upper left partition chart 211, the lower left partition chart 212, the upper right partition chart 213, the lower right partition chart 214, the middle partition chart 215 and the reference partition chart 216 of the chart display structure 21, the maximum and minimum brightness value acquisition system S can be used to obtain a plurality of MTF values ​​by calculating a modulation transfer function (MTF), and the modulation transfer function can meet the following formula:

[0026] MTF=[(I max -I min ) / (I max +I min )]×100%,

[0027] Among them I max is the maximum brightness value, I min is the minimum brightness value.

[0028] It is worth noting that with Figures 1 to 5 As shown, the maximum and minimum brightness value acquisition system S can be used to obtain the maximum brightness value (I max ) and the minimum brightness value (I min ).

[0029] For example, with Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the first method used by the maximum and minimum brightness value acquisition system S includes: first, with Figures 1 to 4 As shown, a grayscale histogram (such as a grayscale histogram corresponding to a chart display structure 21 (such as any one of the upper left partition chart 211, the lower left partition chart 212, the upper right partition chart 213, the lower right partition chart 214, the middle partition chart 215, and the reference partition chart 216) is provided by a maximum and minimum brightness value capturing system S (such as used in conjunction with the image capturing module M and the chart display device 2). Figure 3 As shown in FIG. 1 , it is used to show the relationship between “gray scale” and “number of pixels”. The gray scale histogram can provide a pixel number distribution area Z1 distributed along the direction of increasing gray scale value (the direction of gray scale value from 0 to 255) and a cumulative distribution diagram corresponding to the gray scale histogram (such as Figure 4 As shown, or called pixel accumulation histogram, it is used to show the relationship between "grayscale" and "pixel number" after the number of pixels is accumulated along the direction of increasing grayscale value); then, as Figure 4As shown, the cumulative distribution map provides a pixel quantity cumulative distribution area Z2 distributed along the direction of increasing grayscale values ​​(the direction of grayscale values ​​from 0 to 255); then, as Figure 4 As shown, the “average grayscale value of the first 30% of the cumulative pixel number distribution area Z2 (e.g., the average number of pixels in the first 30% of the cumulative pixel number distribution area Z2)” and the “average grayscale value of the last 30% of the cumulative pixel number distribution area Z2 (e.g., the average number of pixels in the last 30% of the cumulative pixel number distribution area Z2)” are respectively used as the minimum brightness value (I min ) and the maximum brightness value (I max ). However, the above example is only one feasible embodiment and is not intended to limit the present invention.

[0030] For example, with Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the second method used by the maximum and minimum brightness value acquisition system S includes: first, with Figures 1 to 3 As shown, the maximum and minimum brightness value capturing system S (for example, in conjunction with the image capturing module M and the chart display device 2) is used to provide a grayscale histogram (such as any one of the upper left partition chart 211, the lower left partition chart 212, the upper right partition chart 213, the lower right partition chart 214, the middle partition chart 215, and the reference partition chart 216) corresponding to the chart display structure 21. Figure 3 As shown in the figure, it is used to show the relationship between "gray scale" and "number of pixels"); then, Figure 3 As shown, the grayscale histogram provides a pixel quantity distribution area Z1 distributed along the direction of increasing grayscale values ​​(the direction from 0 to 255); then, with Figure 3 and Figure 5 As shown, an optimal threshold value T (or optimal cutting line, such as Figure 5 As shown, for example, the grayscale value 137 is used as the optimal threshold, and the method for obtaining the optimal threshold can be an automatic bi-level thresholding method, such as: the maximum difference binarization method between groups (including the minimum variance within the group or the maximum variance between groups), the entropy measurement threshold value method, the optimal binarization method or the iterative approximation threshold value method); next, as Figure 5 As shown, the pixel number allocation area Z1 is divided into a left pixel number allocation area Z1-L and a right pixel number allocation area Z1-R by using the optimal threshold T; then, as Figure 5As shown, the “average grayscale value of the left pixel number allocation area Z1-L (e.g., the average number of pixels in the left pixel number allocation area Z1-L)” and the “average grayscale value of the right pixel number allocation area Z1-R (e.g., the average number of pixels in the right pixel number allocation area Z1-R)” are respectively used as the minimum brightness value (I min ) and the maximum brightness value (I max ).

[0031] Furthermore, the maximum and minimum brightness value capturing system S can be used as a brightness difference correction system.

[0032] For example, with Figure 1 and Figure 2 As shown, the maximum and minimum brightness value acquisition system S can be used to obtain a "reference area MTF value (G M )”, and obtain the “original upper left area MTF value (UL M )”, and obtain the “original lower left area MTF value (LL M )”, and obtain the “original upper right area MTF value (UR M )”, and obtain the “original lower right area MTF value (LR M )” and obtain the “original middle area MTF value (CT M It should be noted that, for example, the modulation transfer function can be stored in the data processing module 22 for processing the chart information captured from the chart display structure 21 through the image sensing chip M3.

[0033] For example, with Figure 1 and Figure 2 As shown, when the image sensor chip M3 is used to capture the reference partition table 216 and obtain a maximum brightness value (I max ) and a minimum brightness value (I min ) After that, according to the brightness information provided by the maximum brightness value and the minimum brightness value of the reference partition chart 216, the maximum and minimum brightness value acquisition system S can be used to obtain the reference area MTF value (G M ).

[0034] For example, with Figure 1 and Figure 2 As shown, when the image sensor chip M3 is used to capture the upper left partition chart 211 and obtain a maximum brightness value (I max) and a minimum brightness value (I min ), according to the brightness information provided by the maximum brightness value and the minimum brightness value of the upper left partition chart 211, the maximum and minimum brightness value acquisition system S can be used to obtain the original upper left region MTF value of the upper left partition chart 211 by calculating the modulation transfer function. M ) to convert the original upper left area MTF value (UL M ) is converted into a modified upper left area MTF value (UL M '), and the corrected upper left area MTF value can meet the following formula: UL M '=UL M / G M .

[0035] For example, with Figure 1 and Figure 2 As shown, when the image sensor chip M3 is used to capture the lower left partition chart 212 and obtain a maximum brightness value (I max ) and a minimum brightness value (I min ) After that, according to the brightness information provided by the maximum brightness value and the minimum brightness value of the lower left partition chart 212, the maximum and minimum brightness value acquisition system S can be used to obtain the original lower left region MTF value of the lower left partition chart 212 by calculating the modulation transfer function. In this way, the maximum and minimum brightness value acquisition system S can be used to obtain the original lower left region MTF value of the lower left partition chart 212 by comparing the regional MTF value (G M ) to convert the original lower left area MTF value (LL M ) is converted into a modified lower left area MTF value (LL M '), and the corrected lower left area MTF value can meet the following formula: LL M '=LL M / G M .

[0036] For example, with Figure 1 and Figure 2 As shown, when the image sensing chip M3 is used to capture the upper right partition chart 213 and obtain a maximum brightness value (I max ) and a minimum brightness value (I min ) After that, according to the brightness information provided by the maximum brightness value and the minimum brightness value of the upper right partition chart 213, the maximum and minimum brightness value acquisition system S can be used to obtain the original upper right region MTF value of the upper right partition chart 213 by calculating the modulation transfer function. In this way, the maximum and minimum brightness value acquisition system S can be used to obtain the original upper right region MTF value of the upper right partition chart 213 by comparing the regional MTF value (G M) to convert the original upper right area MTF value (UR M ) is converted into a modified upper right area MTF value (UR M '), and the corrected upper right area MTF value can meet the following formula: UR M '=UR M / G M .

[0037] For example, with Figure 1 and Figure 2 As shown, when the image sensor chip M3 is used to capture the lower right partition chart 214 and obtain a maximum brightness value (I max ) and a minimum brightness value (I min ) After that, according to the brightness information provided by the maximum brightness value and the minimum brightness value of the lower right partition chart 214, the maximum and minimum brightness value acquisition system S can be used to obtain the original lower right region MTF value of the lower right partition chart 214 by calculating the modulation transfer function. In this way, the maximum and minimum brightness value acquisition system S can be used to obtain the original lower right region MTF value of the lower right partition chart 214 by comparing the regional MTF value (G M ) to convert the original lower right area MTF value (LR M ) is converted into a modified lower right area MTF value (LR M '), and the corrected MTF value of the lower right area can meet the following formula: LR M '=LR M / G M .

[0038] For example, with Figure 1 and Figure 2 As shown, when the image sensing chip M3 is used to capture the middle partition chart 215 and obtain a maximum brightness value (I max ) and a minimum brightness value (I min ), according to the brightness information provided by the maximum brightness value and the minimum brightness value of the middle partition chart 215, the maximum and minimum brightness value acquisition system S can be used to obtain the original middle area MTF value of the middle partition chart 215 by calculating the modulation transfer function. M ) to convert the original middle area MTF value (CT M ) is converted into a modified mid-range MTF value (CT M '), and the corrected middle area MTF value can meet the following formula: CT M '=CT M / G M .

[0039] Thereby, the maximum and minimum brightness value capture system S can be used to "capture the chart information from the chart display structure 21 through the image sensing chip M3" and "calculate the chart information through the modulation transfer function stored in the data processing module 22" to obtain the control area MTF value, the original upper left area MTF value, the original lower left area MTF value, the original upper right area MTF value, the original lower right area MTF value, the original middle area MTF value, the corrected upper left area MTF value, the corrected lower left area MTF value, the corrected upper right area MTF value, the corrected lower right area MTF value and the corrected middle area MTF value. It is worth noting that the original upper left area MTF value, the original lower left area MTF value, the original upper right area MTF value, the original lower right area MTF value, and the original middle area MTF value can be replaced by the corrected upper left area MTF value, the corrected lower left area MTF value, the corrected upper right area MTF value, the corrected lower right area MTF value, and the corrected middle area MTF value, respectively, for optical testing, so as to avoid the lens structure M2 of the image capture module M failing the optical test due to the original upper left area MTF value, the original lower left area MTF value, the original upper right area MTF value, the original lower right area MTF value, and the original middle area MTF value being too small (due to light attenuation or brightness reduction resulting in too small values).

[0040] For example, with Figures 2 to 8 As shown in any of the figures, the middle partition chart 215 and the reference partition chart 216 can be located between the upper left partition chart 211, the lower left partition chart 212, the upper right partition chart 213, and the lower right partition chart 214. In addition, the reference partition chart 216 can be set above the middle partition chart 215 and located between the upper left partition chart 211, the upper right partition chart 213, and the middle partition chart 215 (as shown in FIG. Figure 2 and Figure 7 Alternatively, the reference partition chart 216 may also be disposed below the middle partition chart 215 and between the lower left partition chart 212, the lower right partition chart 214 and the middle partition chart 215 (as shown in FIG. Figure 6 and Figure 8 It is worth noting that the reference partition chart 216 can be fixed on the chart display structure 21, or the reference partition chart 216 is replaceable instead of being fixed on the chart display structure 21. In other words, according to different needs, the reference partition chart 216 can be fixedly or detachably set on the chart display structure 21. However, the above example is only one feasible embodiment and is not intended to limit the present invention.

[0041] For example, with Figures 2 to 8As shown in any of the figures, the upper left partition chart 211 is located in the upper left area of ​​the middle partition chart 215, the lower left partition chart 212 is located in the lower left area of ​​the middle partition chart 215, the upper right partition chart 213 is located in the upper right area of ​​the middle partition chart 215, and the lower right partition chart 214 is located in the lower right area of ​​the middle partition chart 215. It is worth noting that any one of the upper left partition chart 211, the lower left partition chart 212, the upper right partition chart 213 and the lower right partition chart 214 has the same shortest distance with the middle partition chart 215. That is, relative to the middle partition chart 215, the upper left partition chart 211, the lower left partition chart 212, the upper right partition chart 213 and the lower right partition chart 214 can be arranged symmetrically on the chart display structure 21. However, the above example is only one feasible embodiment and is not intended to limit the present invention.

[0042] For example, with Figures 2 to 8 As shown in any of the figures, the upper left partition chart 211 has a plurality of upper left black areas 211B and a plurality of upper left white areas 211W, the lower left partition chart 212 has a plurality of lower left black areas 212B and a plurality of lower left white areas 212W, the upper right partition chart 213 has a plurality of upper right black areas 213B and a plurality of upper right white areas 213W, the lower right partition chart 214 has a plurality of lower right black areas 214B and a plurality of lower right white areas 214W, the middle partition chart 215 has a plurality of middle black areas 215B and a plurality of middle white areas 215W, and the control partition chart 216 has a plurality of control black areas 216B and a plurality of control white areas 216W (as shown in FIG. Figure 2 and Figure 6 ), or the control partition chart 216 has at least one control black area 216B and at least one control white area 216W (as shown in FIG. Figure 7 and Figure 8 However, the above example is only one feasible embodiment and is not intended to limit the present invention.

[0043] For example, with Figures 2 to 8As shown in any of the figures, the area of ​​the upper left partition chart 211, the area of ​​the lower left partition chart 212, the area of ​​the upper right partition chart 213, the area of ​​the lower right partition chart 214, and the area of ​​the middle partition chart 215 may be the same or similar to each other. More specifically, the total area of ​​the plurality of upper left black regions 211B of the upper left partition chart 211, the total area of ​​the plurality of lower left black regions 212B of the lower left partition chart 212, the total area of ​​the plurality of upper right black regions 213B of the upper right partition chart 213, the total area of ​​the plurality of lower right black regions 214B of the lower right partition chart 214, and the total area of ​​the plurality of middle black regions 215B of the middle partition chart 215 may be the same or similar to each other. In addition, the total area of ​​the plurality of upper left white regions 211W of the upper left partition chart 211, the total area of ​​the plurality of lower left white regions 212W of the lower left partition chart 212, the total area of ​​the plurality of upper right white regions 213W of the upper right partition chart 213, the total area of ​​the plurality of lower right white regions 214W of the lower right partition chart 214, and the total area of ​​the plurality of middle white regions 215W of the middle partition chart 215 may be the same or similar to each other. However, the above example is only one feasible embodiment and is not intended to limit the present invention.

[0044] For example, with Figures 2 to 8 As shown in any of the figures, the area of ​​the control partition chart 216 can be 3 to 10 times greater than the area of ​​the middle partition chart 215. More specifically, the area of ​​at least one control black region 216B of the control partition chart 216 or the total area of ​​the plurality of control black regions 216B of the control partition chart 216 can be 3 to 10 times greater than the total area of ​​the plurality of middle black regions 215B of the middle partition chart 215. In addition, the area of ​​at least one control white region 216W of the control partition chart 216 or the total area of ​​the plurality of control white regions 216W of the control partition chart 216 can be 3 to 10 times greater than the total area of ​​the plurality of middle white regions 215W of the middle partition chart 215. However, the above example is only one possible embodiment and is not intended to limit the present invention.

[0045] [Second embodiment]

[0046] See also Figures 1 to 9As shown, the second embodiment of the present invention provides a maximum and minimum brightness value acquisition method. The main difference between the second embodiment of the present invention and the first embodiment is that the maximum and minimum brightness value acquisition method provided by the second embodiment of the present invention includes at least the following steps: first, a maximum and minimum brightness value acquisition system S is provided (step S100); then, corresponding to a chart display structure 21, the maximum and minimum brightness value acquisition system S is used to obtain multiple MTF values ​​by calculating a modulation transfer function (MTF) (step S102), and the modulation transfer function conforms to the following formula:

[0047] MTF=[(I max -I min ) / (I max +I min )]×100%,

[0048] Among them I max is the maximum brightness value, I min is the minimum brightness value, and the maximum brightness value (I max ) and the minimum brightness value (I min ) Both can be obtained through the first method or the second method.

[0049] Furthermore, with Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the maximum brightness value (I max ) and the minimum brightness value (I min The first method includes: first, with Figures 1 to 4 As shown, a grayscale histogram (such as a grayscale histogram corresponding to a chart display structure 21 (such as any one of the upper left partition chart 211, the lower left partition chart 212, the upper right partition chart 213, the lower right partition chart 214, the middle partition chart 215, and the reference partition chart 216) is provided by a maximum and minimum brightness value capturing system S (such as used in conjunction with the image capturing module M and the chart display device 2). Figure 3 As shown in FIG. 1 , it is used to show the relationship between “gray scale” and “number of pixels”. The gray scale histogram can provide a pixel number distribution area Z1 distributed along the direction of increasing gray scale value (the direction of gray scale value from 0 to 255) and a cumulative distribution diagram corresponding to the gray scale histogram (such as Figure 4 As shown, or called a pixel accumulation histogram, which is used to show the relationship between "grayscale" and "pixel number" after the number of pixels is accumulated along the direction of increasing grayscale value) (step S1011A); then, as Figure 4As shown in FIG. 1 , a cumulative distribution map is provided to provide a pixel quantity cumulative distribution area Z2 distributed along the direction of increasing grayscale values ​​(the direction of grayscale values ​​from 0 to 255) (step S1012A); then, as shown in FIG. Figure 4 As shown, the “average grayscale value of the first 30% of the cumulative pixel number distribution area Z2 (e.g., the average number of pixels in the first 30% of the cumulative pixel number distribution area Z2)” and the “average grayscale value of the last 30% of the cumulative pixel number distribution area Z2 (e.g., the average number of pixels in the last 30% of the cumulative pixel number distribution area Z2)” are respectively used as the minimum brightness value (I min ) and the maximum brightness value (I max )(Step S1013A).

[0050] Furthermore, with Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the maximum brightness value (I max ) and the minimum brightness value (I min The second method includes: first, with Figures 1 to 3 As shown, the maximum and minimum brightness value capturing system S (for example, in conjunction with the image capturing module M and the chart display device 2) is used to provide a grayscale histogram (such as any one of the upper left partition chart 211, the lower left partition chart 212, the upper right partition chart 213, the lower right partition chart 214, the middle partition chart 215, and the reference partition chart 216) corresponding to the chart display structure 21. Figure 3 As shown, it is used to show the relationship between "gray scale" and "number of pixels") (step S1011B); then, as Figure 3 As shown, the grayscale histogram provides a pixel quantity distribution area Z1 distributed along the direction of increasing grayscale values ​​(the direction from 0 to 255) (step S1012B); then, with Figure 3 and Figure 5 As shown, an optimal threshold value T (or optimal cutting line, such as Figure 5 As shown, for example, the grayscale value 137 is used as the optimal threshold, and the method for obtaining the optimal threshold may be an automatic bi-level thresholding method, such as: a maximum difference binarization method between groups (including a minimum variance within a group or a maximum variance between groups), an entropy measurement threshold value method, an optimal binarization method, or an iterative approximation threshold value method) (step S1013B); next, as Figure 5 As shown, the pixel number allocation area Z1 is divided into a left pixel number allocation area Z1-L and a right pixel number allocation area Z1-R by using the optimal threshold T (step S1014B); then, as Figure 5 As shown, the “average grayscale value of the left pixel number allocation area Z1-L (e.g., the average number of pixels in the left pixel number allocation area Z1-L)” and the “average grayscale value of the right pixel number allocation area Z1-R (e.g., the average number of pixels in the right pixel number allocation area Z1-R)” are respectively used as the minimum brightness value (I min ) and the maximum brightness value (I max )(Step S1015B).

[0051] For example, with Figures 1 to 9 As shown, a chart display structure 21 of the maximum and minimum brightness value acquisition system S includes an upper left partition chart 211, a lower left partition chart 212, an upper right partition chart 213, a lower right partition chart 214, a middle partition chart 215, and a reference partition chart 216 that are separated from each other. It is worth noting that the maximum and minimum brightness value acquisition system S can be used to obtain a reference area MTF value (G M ), obtain an original upper left area MTF value (UL M ), obtain an original lower left area MTF value (LL M ), obtain an original upper right area MTF value (UR) of the upper right partition chart 213 M ), obtain an original lower right area MTF value (LR M ) and obtain an original middle area MTF value (CT M In addition, the maximum and minimum brightness value acquisition system S can be used to convert the original upper left area MTF value into a modified upper left area MTF value (UL M '), converting the original lower left area MTF value into a modified lower left area MTF value (LL M '), convert the original upper right area MTF value into a modified upper right area MTF value (UR M '), convert the original lower right area MTF value into a modified lower right area MTF value (LR M ') and converting the original middle region MTF value into a modified middle region MTF value (CT M ').

[0052] Thereby, the maximum and minimum brightness value capture system S can be used to "capture the chart information from the chart display structure 21 through the image sensing chip M3" and "calculate the chart information through the modulation transfer function stored in the data processing module 22" to obtain the control area MTF value, the original upper left area MTF value, the original lower left area MTF value, the original upper right area MTF value, the original lower right area MTF value, the original middle area MTF value, the corrected upper left area MTF value, the corrected lower left area MTF value, the corrected upper right area MTF value, the corrected lower right area MTF value and the corrected middle area MTF value. It is worth noting that the original upper left area MTF value, the original lower left area MTF value, the original upper right area MTF value, the original lower right area MTF value, and the original middle area MTF value can be replaced by the corrected upper left area MTF value, the corrected lower left area MTF value, the corrected upper right area MTF value, the corrected lower right area MTF value, and the corrected middle area MTF value, respectively, for optical testing, so as to avoid the lens structure M2 of the image capture module M failing the optical test due to the original upper left area MTF value, the original lower left area MTF value, the original upper right area MTF value, the original lower right area MTF value, and the original middle area MTF value being too small (due to light attenuation or brightness reduction resulting in too small values).

[0053] [Beneficial Effects of Embodiments]

[0054] One of the beneficial effects of the present invention is that the present invention provides a maximum and minimum brightness value acquisition system S and method, which can provide a grayscale histogram corresponding to the chart display structure 21 and a cumulative distribution diagram corresponding to the grayscale histogram through the maximum and minimum brightness value acquisition system S, and provide a pixel number cumulative distribution area Z2 distributed along the direction of increasing grayscale values ​​from the cumulative distribution diagram, and use the average grayscale value of the first 30% of the pixel number cumulative distribution area Z2 and the average grayscale value of the last 30% of the pixel number cumulative distribution area Z2 as the minimum brightness value (I min ) and the maximum brightness value (I max )" or "providing a grayscale histogram corresponding to the chart display structure 21 through a maximum and minimum brightness value acquisition system S, providing a pixel number allocation area Z1 distributed along a direction of increasing grayscale values ​​through the grayscale histogram, calculating an optimal threshold value T of the pixel number allocation area Z1, dividing the pixel number allocation area Z1 into a left pixel number allocation area Z1-L and a right pixel number allocation area Z1-R through the optimal threshold value T, and taking the average grayscale value of the left pixel number allocation area Z1-L and the average grayscale value of the right pixel number allocation area Z1-R as the minimum brightness value (I min ) and the maximum brightness value (I max)” to obtain the minimum brightness value (I min ) and the maximum brightness value (I max ).

[0055] The contents disclosed above are only preferred feasible embodiments of the present invention, and are not intended to limit the protection scope of the claims of the present invention. Therefore, all equivalent technical changes made using the contents of the present invention description and drawings are included in the protection scope of the claims of the present invention.

Claims

1. A maximum and minimum brightness value acquisition system, characterized in that: The maximum and minimum brightness value acquisition system comprises: a device for carrying an object to be tested, the device for carrying an image capture module, the image capture module comprising a lens holder, a lens structure disposed on the lens holder, and an image sensing chip corresponding to the lens structure; and A chart display device, the chart display device comprising a chart display structure; Wherein, corresponding to the chart display structure, the maximum and minimum brightness value acquisition system is used to obtain a plurality of MTF values ​​by calculating a modulation transfer function MTF, and the modulation transfer function conforms to the following formula: MTF=[(I max -I min ) / (I max +I min )]×100%, Among them I max is the maximum brightness value, I min is the minimum brightness value; Wherein, the maximum and minimum brightness value acquisition system is used to obtain the maximum brightness value and the minimum brightness value through the first method or the second method; The first method used by the maximum and minimum brightness value acquisition system includes: providing a grayscale histogram corresponding to the chart display structure and a cumulative distribution diagram corresponding to the grayscale histogram by the maximum and minimum brightness value acquisition system, providing a pixel quantity cumulative distribution area distributed along the direction of increasing grayscale values ​​by the cumulative distribution diagram, and taking the average grayscale value of the first 30% of the pixel quantity cumulative distribution area and the average grayscale value of the last 30% of the pixel quantity cumulative distribution area as the minimum brightness value and the maximum brightness value respectively; The second method used by the maximum and minimum brightness value acquisition system includes: providing the grayscale histogram corresponding to the chart display structure by the maximum and minimum brightness value acquisition system, providing a pixel number allocation area distributed along the direction of increasing grayscale values ​​by the grayscale histogram, calculating an optimal threshold value of the pixel number allocation area, dividing the pixel number allocation area into a left pixel number allocation area and a right pixel number allocation area by the optimal threshold value, and taking the average grayscale value of the left pixel number allocation area and the average grayscale value of the right pixel number allocation area as the minimum brightness value and the maximum brightness value respectively; The chart display structure includes an upper left partition chart, a lower left partition chart, an upper right partition chart, a lower right partition chart, a middle partition chart and a control partition chart which are separated from each other; The maximum and minimum brightness value acquisition system is used to obtain a reference area MTF value G of the reference partition chart by calculating the modulation transfer function. M , obtain an original upper left area MTF value UL of the upper left partition chart M , obtain an original lower left area MTF value LL of the lower left partition chart M , obtain an original upper right area MTF value UR of the upper right partition chart M , obtain an original lower right area MTF value LR of the lower right partition chart M And obtain an original middle area MTF value CT of the middle partition chart M ; The maximum and minimum brightness value acquisition system is used to convert the original upper left area MTF value into a modified upper left area MTF value UL through the reference area MTF value. M ', convert the original lower left area MTF value into a modified lower left area MTF value LL M ', convert the original upper right area MTF value into a modified upper right area MTF value UR M ', convert the original lower right area MTF value into a modified lower right area MTF value LR M ' and converting the original middle region MTF value into a modified middle region MTF value CT M '.

2. The maximum and minimum brightness value acquisition system according to claim 1, characterized in that: in, The chart display device includes a data processing module storing the modulation transfer function, and is used to obtain the control area MTF value, the original upper left area MTF value, the original lower left area MTF value, the original upper right area MTF value, the original lower right area MTF value, the original middle area MTF value, the modified upper left area MTF value, the modified lower left area MTF value, the modified upper right area MTF value, the modified lower right area MTF value, and the modified middle area MTF value by processing the chart information retrieved from the chart display structure; The modified upper left area MTF value meets the following formula: UL M '=UL M / G M ; The modified lower left area MTF value meets the following formula: LL M '=LL M / G M ; The modified upper right area MTF value meets the following formula: UR M '=UR M / G M ; The modified lower right area MTF value conforms to the following formula: LR M '=LR M / G M ; The modified middle area MTF value meets the following formula: CT M '=CT M / G M .

3. The maximum and minimum brightness value acquisition system according to claim 1, characterized in that: After the image sensor chip is used to capture the reference partition chart and obtain a maximum brightness value and a minimum brightness value of the reference partition chart, the maximum and minimum brightness value capture system is used to obtain the reference area MTF value of the reference partition chart through calculation of the modulation transfer function according to the maximum brightness value and the minimum brightness value of the reference partition chart; Wherein, after the image sensing chip is used to capture the upper left partition chart and obtain a maximum brightness value and a minimum brightness value of the upper left partition chart, the maximum and minimum brightness value capture system is used to obtain the original upper left region MTF value of the upper left partition chart through calculation of the modulation transfer function according to the maximum brightness value and the minimum brightness value of the upper left partition chart; Wherein, after the image sensing chip is used to capture the lower left partition chart and obtain a maximum brightness value and a minimum brightness value of the lower left partition chart, the maximum and minimum brightness value capture system is used to obtain the original lower left region MTF value of the lower left partition chart through calculation of the modulation transfer function according to the maximum brightness value and the minimum brightness value of the lower left partition chart; Wherein, after the image sensing chip is used to capture the upper right partition chart and obtain a maximum brightness value and a minimum brightness value of the upper right partition chart, the maximum and minimum brightness value capture system is used to obtain the original upper right region MTF value of the upper right partition chart through calculation of the modulation transfer function according to the maximum brightness value and the minimum brightness value of the upper right partition chart; Wherein, after the image sensing chip is used to capture the lower right partition chart and obtain a maximum brightness value and a minimum brightness value of the lower right partition chart, the maximum and minimum brightness value capture system is used to obtain the original lower right region MTF value of the lower right partition chart through calculation of the modulation transfer function according to the maximum brightness value and the minimum brightness value of the lower right partition chart; When the image sensing chip is used to capture the middle partition chart and obtain a maximum brightness value and a minimum brightness value of the middle partition chart, the maximum and minimum brightness value capture system is used to obtain the original middle area MTF value of the middle partition chart by calculating the modulation transfer function according to the maximum brightness value and the minimum brightness value of the middle partition chart.

4. The maximum and minimum brightness value acquisition system according to claim 1, characterized in that: The middle partition chart and the reference partition chart are located between the upper left partition chart, the lower left partition chart, the upper right partition chart, and the lower right partition chart, and the reference partition chart is located between the upper left partition chart, the upper right partition chart, and the middle partition chart, or between the lower left partition chart, the lower right partition chart, and the middle partition chart; The upper left partition chart is located in the upper left area of ​​the middle partition chart, the lower left partition chart is located in the lower left area of ​​the middle partition chart, the upper right partition chart is located in the upper right area of ​​the middle partition chart, and the lower right partition chart is located in the lower right area of ​​the middle partition chart, and any one of the upper left partition chart, the lower left partition chart, the upper right partition chart and the lower right partition chart has a same shortest distance with the middle partition chart; wherein the upper left partition chart has a plurality of upper left black areas and a plurality of upper left white areas, the lower left partition chart has a plurality of lower left black areas and a plurality of lower left white areas, the upper right partition chart has a plurality of upper right black areas and a plurality of upper right white areas, the lower right partition chart has a plurality of lower right black areas and a plurality of lower right white areas, the middle partition chart has a plurality of middle black areas and a plurality of middle white areas, and the control partition chart has at least one control black area and at least one control white area; wherein the total area of ​​the plurality of upper left black regions of the upper left partition chart, the total area of ​​the plurality of lower left black regions of the lower left partition chart, the total area of ​​the plurality of upper right black regions of the upper right partition chart, the total area of ​​the plurality of lower right black regions of the lower right partition chart, and the total area of ​​the plurality of middle black regions of the middle partition chart are the same, and the total area of ​​the at least one reference black region of the reference partition chart is between 3 and 10 times greater than the total area of ​​the plurality of middle black regions of the middle partition chart; Among them, the total area of ​​the multiple upper left white areas of the upper left partition chart, the total area of ​​the multiple lower left white areas of the lower left partition chart, the total area of ​​the multiple upper right white areas of the upper right partition chart, the total area of ​​the multiple lower right white areas of the lower right partition chart, and the total area of ​​the multiple middle white areas of the middle partition chart are the same as each other, and the total area of ​​the at least one control white area of ​​the control partition chart is between 3 and 10 times larger than the total area of ​​the multiple middle white areas of the middle partition chart.

5. A method for capturing maximum and minimum brightness values, characterized in that: The maximum and minimum brightness value acquisition method includes: Providing a maximum and minimum brightness value acquisition system; and Corresponding to a chart display structure, the maximum and minimum brightness value acquisition system is used to obtain a plurality of MTF values ​​by calculating a modulation transfer function MTF, and the modulation transfer function conforms to the following formula: MTF=[(I max -I min ) / (I max +I min )]×100%, Among them I max is the maximum brightness value, I min is a minimum brightness value, and both the maximum brightness value and the minimum brightness value are obtained by the first method or the second method; The first method comprises: providing a grayscale histogram corresponding to the chart display structure and a cumulative distribution diagram corresponding to the grayscale histogram by the maximum and minimum brightness value acquisition system, providing a pixel quantity cumulative distribution area distributed along the direction of increasing grayscale values ​​by the cumulative distribution diagram, and taking the average grayscale value of the first 30% of the pixel quantity cumulative distribution area and the average grayscale value of the last 30% of the pixel quantity cumulative distribution area as the minimum brightness value and the maximum brightness value respectively; The second method comprises: providing the grayscale histogram corresponding to the chart display structure by the maximum and minimum brightness value acquisition system, providing a pixel number allocation area distributed along the direction of increasing grayscale values ​​by the grayscale histogram, calculating an optimal threshold value of the pixel number allocation area, dividing the pixel number allocation area into a left pixel number allocation area and a right pixel number allocation area by the optimal threshold value, and taking the average grayscale value of the left pixel number allocation area and the average grayscale value of the right pixel number allocation area as the minimum brightness value and the maximum brightness value respectively; The chart display structure includes an upper left partition chart, a lower left partition chart, an upper right partition chart, a lower right partition chart, a middle partition chart and a control partition chart which are separated from each other; The maximum and minimum brightness value acquisition system is used to obtain a reference area MTF value G of the reference partition chart by calculating the modulation transfer function. M , obtain an original upper left area MTF value UL of the upper left partition chart M , obtain an original lower left area MTF value LL of the lower left partition chart M , obtain an original upper right area MTF value UR of the upper right partition chart M , obtain an original lower right area MTF value LR of the lower right partition chart M And obtain an original middle area MTF value CT of the middle partition chart M ; The maximum and minimum brightness value acquisition system is used to convert the original upper left area MTF value into a modified upper left area MTF value UL through the reference area MTF value. M ', convert the original lower left area MTF value into a modified lower left area MTF value LL M ', convert the original upper right area MTF value into a modified upper right area MTF value UR M ', convert the original lower right area MTF value into a modified lower right area MTF value LR M ' and converting the original middle region MTF value into a modified middle region MTF value CT M '.

6. The maximum and minimum brightness value acquisition method according to claim 5, characterized in that: The maximum and minimum brightness value acquisition system includes a data processing module storing the modulation transfer function, and is used to obtain the control area MTF value, the original upper left area MTF value, the original lower left area MTF value, the original upper right area MTF value, the original lower right area MTF value, the original middle area MTF value, the modified upper left area MTF value, the modified lower left area MTF value, the modified upper right area MTF value, the modified lower right area MTF value, and the modified middle area MTF value by processing the chart information acquired from the chart display structure; The modified upper left area MTF value meets the following formula: UL M '=UL M / G M ; The modified lower left area MTF value meets the following formula: LL M '=LL M / G M ; The modified upper right area MTF value meets the following formula: UR M '=UR M / G M ; The modified lower right area MTF value conforms to the following formula: LR M '=LR M / G M ; The modified middle area MTF value meets the following formula: CT M '=CT M / G M .

7. The maximum and minimum brightness value acquisition method according to claim 5, characterized in that: The maximum and minimum brightness value acquisition system uses an image sensing chip; Wherein, after the image sensing chip is used to capture the reference partition chart and obtain a maximum brightness value and a minimum brightness value of the reference partition chart, the maximum and minimum brightness value capture system is used to obtain the reference area MTF value of the reference partition chart by calculating the modulation transfer function according to the maximum brightness value and the minimum brightness value of the reference partition chart; Wherein, after the image sensing chip is used to capture the upper left partition chart and obtain a maximum brightness value and a minimum brightness value of the upper left partition chart, the maximum and minimum brightness value capture system is used to obtain the original upper left region MTF value of the upper left partition chart through calculation of the modulation transfer function according to the maximum brightness value and the minimum brightness value of the upper left partition chart; Wherein, after the image sensing chip is used to capture the lower left partition chart and obtain a maximum brightness value and a minimum brightness value of the lower left partition chart, the maximum and minimum brightness value capture system is used to obtain the original lower left region MTF value of the lower left partition chart through calculation of the modulation transfer function according to the maximum brightness value and the minimum brightness value of the lower left partition chart; Wherein, after the image sensing chip is used to capture the upper right partition chart and obtain a maximum brightness value and a minimum brightness value of the upper right partition chart, the maximum and minimum brightness value capture system is used to obtain the original upper right region MTF value of the upper right partition chart through calculation of the modulation transfer function according to the maximum brightness value and the minimum brightness value of the upper right partition chart; Wherein, after the image sensing chip is used to capture the lower right partition chart and obtain a maximum brightness value and a minimum brightness value of the lower right partition chart, the maximum and minimum brightness value capture system is used to obtain the original lower right region MTF value of the lower right partition chart through calculation of the modulation transfer function according to the maximum brightness value and the minimum brightness value of the lower right partition chart; When the image sensing chip is used to capture the middle partition chart and obtain a maximum brightness value and a minimum brightness value of the middle partition chart, the maximum and minimum brightness value capture system is used to obtain the original middle area MTF value of the middle partition chart by calculating the modulation transfer function according to the maximum brightness value and the minimum brightness value of the middle partition chart.

8. The maximum and minimum brightness value acquisition method according to claim 5, characterized in that: The middle partition chart and the reference partition chart are located between the upper left partition chart, the lower left partition chart, the upper right partition chart, and the lower right partition chart, and the reference partition chart is located between the upper left partition chart, the upper right partition chart, and the middle partition chart, or between the lower left partition chart, the lower right partition chart, and the middle partition chart; The upper left partition chart is located in the upper left area of ​​the middle partition chart, the lower left partition chart is located in the lower left area of ​​the middle partition chart, the upper right partition chart is located in the upper right area of ​​the middle partition chart, and the lower right partition chart is located in the lower right area of ​​the middle partition chart, and any one of the upper left partition chart, the lower left partition chart, the upper right partition chart and the lower right partition chart has a same shortest distance with the middle partition chart; wherein the upper left partition chart has a plurality of upper left black areas and a plurality of upper left white areas, the lower left partition chart has a plurality of lower left black areas and a plurality of lower left white areas, the upper right partition chart has a plurality of upper right black areas and a plurality of upper right white areas, the lower right partition chart has a plurality of lower right black areas and a plurality of lower right white areas, the middle partition chart has a plurality of middle black areas and a plurality of middle white areas, and the control partition chart has at least one control black area and at least one control white area; wherein the total area of ​​the plurality of upper left black regions of the upper left partition chart, the total area of ​​the plurality of lower left black regions of the lower left partition chart, the total area of ​​the plurality of upper right black regions of the upper right partition chart, the total area of ​​the plurality of lower right black regions of the lower right partition chart, and the total area of ​​the plurality of middle black regions of the middle partition chart are the same, and the total area of ​​the at least one reference black region of the reference partition chart is between 3 and 10 times greater than the total area of ​​the plurality of middle black regions of the middle partition chart; Among them, the total area of ​​the multiple upper left white areas of the upper left partition chart, the total area of ​​the multiple lower left white areas of the lower left partition chart, the total area of ​​the multiple upper right white areas of the upper right partition chart, the total area of ​​the multiple lower right white areas of the lower right partition chart, and the total area of ​​the multiple middle white areas of the middle partition chart are the same as each other, and the total area of ​​the at least one control white area of ​​the control partition chart is between 3 and 10 times larger than the total area of ​​the multiple middle white areas of the middle partition chart.

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