Color film pad material basic parameter measurement method and device and storage medium

Abstract

The application discloses a kind of color film pad basic parameter measurement method, device and storage medium, it is related to parameter measurement technical field, the method includes: according to point cloud data set generation initial two-dimensional gray image;Wherein, point cloud data set is the point cloud data set of the whole of reference object and the color film pad to be measured when color film pad to be measured is placed on the upper surface of horizontal reference object;Identify the area to be supplemented of color film pad in initial two-dimensional gray image, determine the connected region in initial two-dimensional gray image according to area to be supplemented, and determine the center point position of connected region;Determine the height of color film pad based on the first height value of corresponding point of corresponding point cloud data set of the center point position of connected region and the second height value of corresponding point of corresponding point cloud data set of reference object, this method can quickly and accurately determine the basic parameters of color film pad, so as to facilitate relevant personnel to determine the amount of liquid crystal needed to be poured, ensure that the quality of LCD generated after pouring liquid crystal reaches the expectation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of workpiece parameter measurement, and in particular to a photo spacer basic parameter measurement method and device and a storage medium. BACKGROUND

[0002] Liquid Crystal Display (LCD) is a kind of flat panel display, which is used for screen display of television and computer. In the production process of LCD, liquid crystal is sandwiched between two glass substrates, and the two glass substrates are combined. The two glass substrates are TFT Array glass (hereinafter referred to as Array glass substrate) and color filter (hereinafter referred to as CF glass substrate). The CF glass substrate is mainly used for controlling RGB color, and the Array glass substrate is mainly used for controlling color switching to control which pixels on the CF glass substrate are lit. A plurality of photo spacers (PS, which can be understood as small columns) are arranged on the surface of the two glass substrates. When the two glass substrates are combined, the photo spacers isolate a gap between the two glass substrates. The gap is filled with liquid crystal, as shown in FIG. 1. Figure 2

[0003] The photo spacers are distributed on the surface of the two glass substrates. After the photo spacers are manufactured, the basic parameters (including height and volume) of each photo spacer must be measured to determine the amount of liquid crystal poured to avoid the prepared LCD being scrapped and the cost being increased. For example, if the photo spacers are too low and the liquid crystal is poured according to the original pouring amount, the liquid crystal will be poured too much, which will cause the two bonded glass substrates to be lifted up and form a bulge. On the contrary, if the photo spacers are too high and the liquid crystal is poured according to the original pouring amount, the gap between the two glass substrates will not be filled with liquid crystal, which will form an internal bubble.

[0004] In actual production process, if the photo spacers manufactured are higher or lower than the standard value, the related staff can adjust the liquid crystal pouring amount according to the measured deviation to ensure the process quality. However, since the photo spacers are micro-sized workpieces, the existing photo spacer measurement method is difficult to complete high-precision measurement of the photo spacers, which cannot guarantee that the quality of the LCD generated after pouring liquid crystal reaches the expectation. SUMMARY

[0005] The technical problem to be solved by the present application is that the existing photo spacer basic parameter measurement method has low precision and cannot guarantee that the quality of the LCD generated after pouring liquid crystal reaches the expectation. To solve the technical problem, the present application provides a photo spacer basic parameter measurement method and device and a storage medium. ​

[0006] The technical solution of the present application to solve the above technical problems is as follows:

[0007] A color film gasket basic parameter measurement method, comprising the following steps:

[0008] Obtain a point cloud data set, and generate an initial two-dimensional gray image according to the point cloud data set; wherein the point cloud data set is a point cloud data set of the whole of the color film gasket to be measured and the reference object obtained when the color film gasket to be measured is placed on the upper surface of the horizontal reference object;

[0009] Identify the point area to be supplemented of the color film gasket in the initial two-dimensional gray image, determine the connected area representing the color film gasket in the initial two-dimensional gray image according to the point area to be supplemented, and determine the center point position of the connected area; wherein the connected area includes the point area to be supplemented of the color film gasket and the known area;

[0010] Determine the height of the color film gasket based on the first height value of the corresponding point of the corresponding point cloud data set and the second height value of the corresponding point of the corresponding point cloud data set of the reference object corresponding to the center point position of the connected area.

[0011] The beneficial effects of the present application are: based on the structural characteristics of the color film gasket, the center point position of the color film gasket is determined, and the height value corresponding to the center point position and the height value corresponding to the reference object are combined, so that the height of the color film gasket can be quickly and accurately determined; the present application can measure the basic parameters of the color film gasket that maintains the distance between the upper and lower glass substrates of the LCD with high precision, has high detection efficiency, and can facilitate relevant personnel to determine the amount of liquid crystal that needs to be poured, so as to ensure that the quality of the LCD generated after pouring the liquid crystal reaches the expected value.

[0012] To solve the above technical problems, the present application also provides a color film gasket basic parameter measurement device, comprising:

[0013] A gray image generation module is configured to obtain a point cloud data set, and generate an initial two-dimensional gray image according to the point cloud data set; wherein the point cloud data set is a point cloud data set of the whole of the color film gasket to be measured and the reference object obtained when the color film gasket to be measured is placed on the upper surface of the horizontal reference object;

[0014] A center point determination module is configured to identify the point area to be supplemented of the color film gasket in the initial two-dimensional gray image, determine the connected area representing the color film gasket in the initial two-dimensional gray image according to the point area to be supplemented, and determine the center point position of the connected area; wherein the connected area includes the point area to be supplemented of the color film gasket and the known area;

[0015] A height determination module is configured to determine the height of the color film gasket based on a first height value of a corresponding point in the corresponding point cloud data set of the connected region and a second height value of a corresponding point in the corresponding point cloud data set of the reference object.

[0016] To solve the above technical problems, the application further provides a color film gasket basic parameter measurement device, which comprises a memory, a processor and a computer program stored in the memory and executable on the processor, and the processor implements the color film gasket basic parameter measurement method as described above when executing the computer program.

[0017] To solve the above technical problems, the application further provides a computer readable storage medium, which stores a computer program, and the computer program is executable on a processor to implement the color film gasket basic parameter measurement method as described above. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A flowchart of the color film gasket basic parameter measurement method in the embodiment of the application is shown in the figure.

[0019] Figure 2 A schematic diagram of the combination of two glass substrates in the embodiment of the application is shown in the figure.

[0020] Figure 3 A three-dimensional modeling schematic diagram of the real shape of the color film gasket in the embodiment of the application is shown in the figure.

[0021] Figure 4 A top view of the color film gasket in the embodiment of the application is shown in the figure.

[0022] Figure 5 A binomial fitting-based algorithm schematic diagram in the embodiment of the application is shown in the figure.

[0023] Figure 6 A shape curve schematic diagram of the color film gasket before filling the point supplement area and its front view is shown in the figure.

[0024] Figure 7 A shape curve schematic diagram of the color film gasket after filling the point supplement area and its front view is shown in the figure.

[0025] Figure 8 A color film gasket volume calculation schematic diagram in the embodiment of the application is shown in the figure.

[0026] Figure 9 A structure schematic diagram of the color film gasket basic parameter measurement device in the embodiment of the application is shown in the figure. DETAILED DESCRIPTION

[0027] The principles and features of the present application are described below, and the examples are used to explain the present application, but not to limit the scope of the present application.

[0028] The accurate measurement of the color film gasket includes the color film gasket height, the color film gasket volume, and the axis length of the cross section of the color film gasket at a specified height. To achieve accurate measurement of the color film gasket, a device such as a three-dimensional laser scanner is used to obtain the three-dimensional morphology of the color film gasket (i.e. three-dimensional point cloud data). The system principle for obtaining the three-dimensional morphology of the color film gasket by using a three-dimensional laser scanner is as follows: the three-dimensional laser scanner is used to scan layer by layer from the bottom to the top of the color film gasket surface within the field of view, obtain hundreds of interference fringe images, find the position of each pixel point at which the light intensity is maximum in the process, and complete 3D reconstruction, as shown in FIG. 1. Figure 3

[0029] However, since the shape of the color film gasket is close to an elliptical cylinder, the bottom surface to the top surface is in a slightly inclined state, and thus when obtaining the three-dimensional point cloud data of the color film gasket, the longitudinal refraction of light makes it difficult for the inclined surface of the color film gasket to receive reflected light, resulting in the loss of corresponding three-dimensional point cloud data, as shown in FIG. 2. Figure 4 Figure 4 The black area in FIG. 2 is a data defect caused by the fact that the inclined surface of the color film gasket does not receive reflected light. Therefore, before measuring the volume, cross-sectional axis length, and other basic parameters of the color film gasket, the three-dimensional point cloud data loss problem needs to be solved, that is, by performing data point filling (the area to be filled is the black area described above), the measurement accuracy of the related parameters of the color film gasket is ensured.

[0030] Embodiment One

[0031] As shown in FIG. 3, the present embodiment provides a color film gasket basic parameter measurement method, which includes the following steps: Figure 1 Obtain a point cloud data set, and generate an initial two-dimensional gray-scale image based on the point cloud data set; wherein the point cloud data set is the point cloud data set of the whole to-be-measured color film gasket and reference object when the to-be-measured color film gasket is placed on the upper surface of the horizontal reference object;

[0032] Identify the to-be-filled point area of the color film gasket in the initial two-dimensional gray-scale image, determine the connected area representing the color film gasket in the initial two-dimensional gray-scale image based on the to-be-filled point area, and determine the center point position of the connected area; wherein the connected area includes the to-be-filled point area and the known area of the color film gasket;

[0033] Determine the height of the color film gasket based on the first height value of the corresponding point of the point cloud data set corresponding to the center point position of the connected area and the second height value of the corresponding point of the point cloud data set corresponding to the reference object.

[0034] ​​​

[0035] In this embodiment, the point cloud data set is obtained by a three-dimensional laser scanner, and the shape of the reference object is regular, such as a cube, a cuboid, or a cylinder.

[0036] The method is based on the structural characteristics of the color film pad, and the center point position of the color film pad is determined, and the height value corresponding to the center point position and the height value corresponding to the reference object are combined, so that the height of the color film pad can be quickly and accurately determined; according to the determined basic parameters, relevant personnel can determine the amount of liquid crystal that needs to be poured, so as to ensure that the quality of the LCD generated after pouring the liquid crystal reaches the expected value; the present application can realize high-precision measurement of the basic parameters of the color film pad for maintaining the distance between the upper and lower glass substrates of the LCD, and has high detection efficiency.

[0037] The point cloud data set includes a plurality of three-dimensional point cloud data.

[0038] The initial two-dimensional gray image is generated according to the point cloud data set, including the following steps:

[0039] Each three-dimensional point cloud data in the point cloud data set is mapped to a pre-constructed three-dimensional coordinate system to determine the three-dimensional information of each three-dimensional point cloud data; wherein the three-dimensional information includes a horizontal coordinate value, a vertical coordinate value and a height value;

[0040] A two-dimensional height matrix is generated according to each three-dimensional information, wherein each three-dimensional point cloud data corresponds to an element in the two-dimensional height matrix, the value of the element corresponding to the three-dimensional point cloud data in the two-dimensional height matrix is the height value in the corresponding three-dimensional point cloud data, and the value of the element not corresponding to the three-dimensional point cloud data in the two-dimensional height matrix is a preset height value;

[0041] The value of each element in the two-dimensional height matrix is mapped to a gray value between 0 and 255 to generate an initial two-dimensional gray image.

[0042] When the point cloud data set is obtained, due to the structure of the color film pad, the three-dimensional point cloud data corresponding to some parts of the color film pad will be lost, that is, the complete point cloud data of the color film pad cannot be obtained, resulting in the existence of elements in the two-dimensional height matrix not corresponding to the three-dimensional point cloud data. The method generates a two-dimensional gray image based on the obtained point cloud data set, which facilitates subsequent efficient point cloud filling and color film pad measurement.

[0043] In the embodiment, the preset height value is 0, that is, the value of the element corresponding to the to-be-supplemented point region in the two-dimensional height matrix is 0, that is, the height value corresponding to each pixel point in the to-be-supplemented point region is assumed to be 0; in the two-dimensional height matrix, the gray value of the element with a value of 0 at the corresponding position in the two-dimensional gray image is 0, and at this time, the gray value of the missing point cloud at the corresponding position in the two-dimensional gray image is 0. It should be noted that the preset height value can also be selected as other numerical values, and the selection of the height value requires being greater than the maximum height value in each three-dimensional point cloud data or being less than the minimum height value in each three-dimensional point cloud data, so as to clearly distinguish the pixel points corresponding to the to-be-supplemented point region and each three-dimensional point cloud data.

[0044] The method further includes the following steps of:

[0045] Fitting the minimum circumscribed rectangle of the connected region, and taking the center point of the minimum circumscribed rectangle as the center point position of the connected region.

[0046] According to the shape characteristics of the color film gasket, the to-be-supplemented point region is in the form of a ring, and based on this, the center point of the color film gasket can also be assumed to be the center point of the to-be-supplemented point region.

[0047] The method further includes the following steps of:

[0048] Subtracting the second height value of the corresponding point of the reference object corresponding point cloud data set from the first height value of the corresponding point cloud data set corresponding to the center point position of the connected region, to obtain the height of the color film gasket.

[0049] Optionally, the method further includes the following steps of determining the volume of the color film gasket, specifically including:

[0050] Training by using the three-dimensional point cloud data corresponding to the known region in the connected region, and predicting the height value corresponding to each pixel point in the to-be-supplemented point region by binomial fitting;

[0051] Determining the volume of the color film gasket according to the height value corresponding to each pixel point in the entire connected region after the point supplementing processing.

[0052] The method further includes the following steps of training by using the three-dimensional point cloud data corresponding to the known region in the connected region, and predicting the height value corresponding to each pixel point in the to-be-supplemented point region by binomial fitting:

[0053] Starting from the pixel at the center point, extend the image in a preset direction in units of one pixel towards the initial two-dimensional grayscale image until the area to be filled is encountered, thus obtaining multiple first pixels. The first pixels are pixels in the preset direction that are between the center point and the area to be filled.

[0054] Based on the position information and corresponding height value of each first pixel, a binomial fitting is performed to determine each fitting parameter in the binomial fitting equation corresponding to the preset direction;

[0055] Extending further in the preset direction, the pixels in the area to be supplemented located in the preset direction are taken as second pixels, and the position information of each second pixel is determined;

[0056] For each second pixel, the height value corresponding to the second pixel is determined based on the position information of the second pixel and the binomial fitting equation;

[0057] In the region of points to be filled, all pixels that are equidistant from the center point are assigned the same height value.

[0058] In this embodiment, the preset direction is arbitrary. Each extension point (i.e., the first pixel) is considered as training data. The position information of the extension point (specifically, the distance between the extension point and the pixel where the center point is located, in pixels) is used as the independent variable, and the height value corresponding to the extension point is used as the dependent variable. Through binomial fitting, the binomial fitting equation z = ax is determined. 2 The three fitting parameters a, b, and c in +bx+c are used to predict the height value corresponding to each second pixel in the region to be filled (corresponding to...). Figure 5 The predicted data (in the image) was used to fill in the area to be filled, such as... Figure 5 As shown, the height value of each pixel in the region to be supplemented is determined by a binomial fitting method, which has the advantages of high accuracy and high efficiency. It can reconstruct the complete three-dimensional point cloud data of the color filter pad, and the volume of the color filter pad can be determined based on the complete three-dimensional point cloud data of the color filter pad.

[0059] The shape curve of the area to be filled in the color filter pad and its front view before filling is as follows: Figure 6 As shown, Figure 6 The defective area in the image is the area to be filled mentioned above. The shape curve of the area to be filled in the color filter pad material after filling and its front view is as follows: Figure 7 As shown.

[0060] The step of determining the volume of the color filter pad material based on the height values ​​of each pixel in the entire connected region after the point-filling processing includes the following steps:

[0061] mapping the height value corresponding to each pixel point in the to-be-supplemented region to a gray value between 0 and 255, and updating the initial two-dimensional gray image to obtain a target two-dimensional gray image;

[0062] performing binaryzation processing on the target two-dimensional gray image to segment out a region where the color filter gasket is located, to obtain a target region;

[0063] adding the value obtained by subtracting the second height value from the height value corresponding to each pixel point in the target region, to obtain the volume of the color filter gasket.

[0064] The color filter gasket is an irregular oval shape, and if an oval volume calculation formula is used to calculate the volume of the color filter gasket, the calculation accuracy is low. Based on this, the method imagines the color filter gasket as being composed of a plurality of 1x1 (unit: pixel) pixel points, as shown in FIG. 1, and each pixel point corresponds to a height value, so that the volume of the color filter gasket can be quantified as a plurality of volume calculations, and the volume calculation formula of each pixel point that composes the color filter gasket is S = 1x1xz, where S represents the volume, and z represents the value obtained by subtracting the second height value from the height value corresponding to the pixel point. Figure 8 Figure 4 The area of the target region in which the color filter gasket is fitted (i.e., the target region) is the total number of pixel points that compose the color filter gasket.

[0065] Optionally, the method further includes performing connected component analysis on the target region to obtain the cross-sectional minor axis length and the cross-sectional major axis length of the color filter gasket.

[0066] The connected component analysis on the target region to obtain the cross-sectional minor axis length and the cross-sectional major axis length of the color filter gasket includes the following steps:

[0067] taking the height value corresponding to the cross section to be measured as a target height value;

[0068] taking the pixel points in the target region whose corresponding height values are greater than or equal to the target height value as target pixel points;

[0069] taking the region composed of the target pixel points as a cross-sectional region, and performing connected component analysis on the cross-sectional region to obtain the minor axis length and the major axis length of the cross section.

[0070] In this embodiment, the cross-sectional region can be subjected to connected component analysis by using a Blob analysis function provided by OpenCV to obtain the minor axis length and the major axis length of the cross section. By obtaining the cross-sectional minor axis length and the cross-sectional major axis length, it is convenient for relevant technical personnel to perform quality analysis.

[0071] ​The method provided by the embodiment can be used to measure the basic parameters of the color film gasket, the detection range of the axial length (i.e. the length of the short axis of the cross section and the length of the long axis of the cross section) can be 0.5 microns to 15 microns, and the repeated detection accuracy of the longitudinal direction (i.e. the height) can be less than 0.018 microns. To verify the effect of the method, the same color film gasket is repeatedly tested by using a 50 times lens, i.e. the color film gasket is repeatedly collected 30 times at a single position, and the accuracy of the point cloud filling and the stability of the axial length measurement are counted. Finally, it is concluded that the 3 times standard deviation of the height of the color film gasket is within 0.018 millimeters, and the stability of the axial length is within 0.3, which can meet the use standard of the equipment manufacturer.

[0072] The embodiment provides a three-dimensional topography measurement method of a three-dimensional micro-nano structure, improves the ability of high-end optical detection and precision measurement technology, and is beneficial to the expansion of machine vision detection technology from the later process to the earlier process in the field of LCD and OLED detection process. Meanwhile, the method can be applied in the fields of electronics and semiconductors, 3C electronics, ultra-precision machining, etc., and is beneficial to the development of more industrial quality detection equipment.

[0073] Embodiment two

[0074] Based on the same principle as the color film gasket basic parameter measurement method described in the above embodiment one, the embodiment provides a color film gasket basic parameter measurement device, as shown in Figure 9 The device comprises:

[0075] A gray image generation module is configured to acquire a point cloud data set and generate an initial two-dimensional gray image according to the point cloud data set; wherein the point cloud data set is the point cloud data set of the whole color film gasket and reference object obtained when the color film gasket to be measured is placed on the upper surface of the horizontal reference object.

[0076] A center point determination module is configured to identify a point area to be filled of the color film gasket in the initial two-dimensional gray image, determine a connected area representing the color film gasket in the initial two-dimensional gray image according to the point area to be filled, and determine the center point position of the connected area; wherein the connected area comprises the point area to be filled and a known area of the color film gasket.

[0077] A height determination module is configured to determine the height of the color film gasket based on the first height value of the corresponding point of the point cloud data set corresponding to the center point position of the connected area and the second height value of the corresponding point of the corresponding point cloud data set of the reference object.

[0078] The gray image generation module is configured to generate the initial two-dimensional gray image according to the point cloud data set, and specifically configured to:

[0079] mapping each three-dimensional point cloud data in the set of point cloud data into a pre-constructed three-dimensional coordinate system to determine three-dimensional information of each three-dimensional point cloud data; wherein the three-dimensional information includes a horizontal coordinate value, a vertical coordinate value and a height value;

[0080] generating a two-dimensional height matrix according to each three-dimensional information, wherein each three-dimensional point cloud data corresponds to an element in the two-dimensional height matrix, the value of the element corresponding to the three-dimensional point cloud data in the two-dimensional height matrix is the height value in the corresponding three-dimensional point cloud data, and the value of the element not corresponding to the three-dimensional point cloud data in the two-dimensional height matrix is a preset height value;

[0081] mapping the value of each element in the two-dimensional height matrix to a gray value between 0 and 255 to generate an initial two-dimensional gray image.

[0082] The center point determination module is configured to determine the center point position of the connected region, and specifically configured to:

[0083] fitting a minimum circumscribed rectangle of the connected region, and taking the center point of the minimum circumscribed rectangle as the center point position of the connected region.

[0084] Optionally, the device further comprises a volume determination module, wherein the volume determination module comprises:

[0085] a point cloud completion unit configured to train the three-dimensional point cloud data corresponding to the known region in the connected region, and predict the height value corresponding to each pixel point in the to-be-completed point region through binomial fitting;

[0086] a volume determination unit configured to determine the volume of the color filter pad according to the height value corresponding to each pixel point in the entire connected region after the to-be-completed point processing.

[0087] The point cloud completion unit is specifically configured to:

[0088] taking the pixel point at the center point position as a starting point, extending in a preset direction of the initial two-dimensional gray image by one pixel as a unit until the to-be-completed point region is encountered, to obtain a plurality of first pixel points, wherein the first pixel points are pixel points in the preset direction and between the center point position and the to-be-completed point region;

[0089] performing binomial fitting according to the position information and the corresponding height value of each first pixel point to determine each fitting parameter in the binomial fitting equation corresponding to the preset direction;

[0090] continuing to extend in the preset direction, taking the pixel point in the to-be-completed point region located in the preset direction as a second pixel point, and determining the position information of each second pixel point;

[0091] For each of the second pixel points, according to the position information of the second pixel point and the binomial fitting equation, a height value corresponding to the second pixel point is determined;

[0092] In the to-be-supplemented point region, all pixel points with the same distance from the center point position are assigned the same height value.

[0093] The volume determination unit is specifically configured to:

[0094] Map the height value corresponding to each pixel point in the to-be-supplemented point region to a gray value between 0 and 255, and update the initial two-dimensional gray image to obtain a target two-dimensional gray image;

[0095] Perform binaryzation processing on the target two-dimensional gray image to segment out a region where the color film pad is located, to obtain a target region;

[0096] Add the value obtained by subtracting the second height value from the height value corresponding to each pixel point in the target region, to obtain the volume of the color film pad.

[0097] Optionally, the device further includes an axis length determination module, which is configured to perform connected component analysis on the target region to obtain a short axis length of a cross section of the color film pad and a long axis length of the cross section.

[0098] Embodiment Three

[0099] To solve the above technical problem, the embodiment provides a color film pad basic parameter measurement device, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor implements the color film pad basic parameter measurement method as described in Embodiment One when executing the computer program.

[0100] Embodiment Four

[0101] To solve the above technical problem, the embodiment provides a computer readable storage medium, which stores a computer program, and the computer program is executable on a processor to implement the color film pad basic parameter measurement method as described in Embodiment One.

[0102] In the description of the application, it is necessary to understand that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0103] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0104] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0105] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", "some examples" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, different embodiments or examples described in the present application and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0106] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A method for measuring the basic parameters of colored film padding material, characterized in that, Includes the following steps: A point cloud data set is acquired, and an initial two-dimensional grayscale image is generated based on the point cloud data set; wherein, the point cloud data set is the overall point cloud data set of the color filter pad to be tested and the reference object obtained when the color filter pad to be tested is placed on the upper surface of a horizontal reference object; Identify the areas of the color filter pad material to be supplemented in the initial two-dimensional grayscale image, determine the connected regions representing the color filter pad material in the initial two-dimensional grayscale image based on the areas of the areas to be supplemented, and determine the center point position of the connected regions; wherein, the connected regions include the areas of the color filter pad material to be supplemented and known regions; The height of the color film pad is determined based on the first height value of the point cloud data set corresponding to the center point of the connected region and the second height value of the point cloud data set corresponding to the reference object. It also includes the step of determining the volume of the color filter pad, specifically including: The height values ​​of each pixel in the region to be supplemented are predicted by binomial fitting using the 3D point cloud data corresponding to the known regions in the connected region. The volume of the color filter pad is determined based on the height values ​​of each pixel in the entire connected region after the point-filling process, specifically: Map the height value of each pixel in the region to be filled to a gray value between 0 and 255, and update the initial two-dimensional grayscale image to obtain the target two-dimensional grayscale image; The target two-dimensional grayscale image is binarized to segment the area where the color filter pad is located, thus obtaining the target area; The volume of the color filter pad is obtained by subtracting the second height value from the height value of each pixel in the target area and then adding the results.

2. The method according to claim 1, characterized in that, The process of generating an initial two-dimensional grayscale image based on the point cloud data set includes the following steps: Each 3D point cloud data in the point cloud dataset is mapped to a pre-constructed 3D coordinate system to determine the 3D information of each 3D point cloud data; wherein, the 3D information includes the x-coordinate value, y-coordinate value, and height value; A two-dimensional height matrix is ​​generated based on each of the three-dimensional information, wherein each of the three-dimensional point cloud data corresponds to an element in the two-dimensional height matrix, the value of the element in the two-dimensional height matrix corresponding to the three-dimensional point cloud data is the height value in the corresponding three-dimensional point cloud data, and the value of the element in the two-dimensional height matrix not corresponding to the three-dimensional point cloud data is a preset height value. The values ​​of each element in the two-dimensional height matrix are mapped to grayscale values ​​between 0 and 255 to generate an initial two-dimensional grayscale image.

3. The method according to claim 1, characterized in that, Determining the location of the center point of the connected region includes the following steps: Fit the minimum bounding rectangle of the connected region, and take the center point of the minimum bounding rectangle as the center point of the connected region.

4. The method according to claim 1, characterized in that, The process of training using 3D point cloud data corresponding to known regions within the connected region, and predicting the height values ​​of each pixel in the region to be supplemented through binomial fitting, includes the following steps: Starting from the pixel at the center point, extend the image in a preset direction in units of one pixel towards the initial two-dimensional grayscale image until the area to be filled is encountered, thus obtaining multiple first pixels. The first pixels are pixels in the preset direction that are between the center point and the area to be filled. Based on the position information and corresponding height value of each first pixel, a binomial fitting is performed to determine each fitting parameter in the binomial fitting equation corresponding to the preset direction; Extending further in the preset direction, the pixels in the area to be supplemented located in the preset direction are taken as second pixels, and the position information of each second pixel is determined; For each second pixel, the height value corresponding to the second pixel is determined based on the position information of the second pixel and the binomial fitting equation; In the region of points to be filled, all pixels that are equidistant from the center point are assigned the same height value.

5. The method according to claim 1, characterized in that, It also includes performing connected component analysis on the target region to obtain the minor axis length and major axis length of the cross-section of the color filter pad.

6. A device for measuring the basic parameters of colored film padding, characterized in that, include: A grayscale image generation module is used to acquire a point cloud data set and generate an initial two-dimensional grayscale image based on the point cloud data set; wherein, the point cloud data set is the overall point cloud data set of the color filter pad to be tested and the reference object obtained when the color filter pad to be tested is placed on the upper surface of a horizontal reference object; The center point determination module is used to identify the area of ​​the color filter pad material to be filled in the initial two-dimensional grayscale image, determine the connected region representing the color filter pad material in the initial two-dimensional grayscale image based on the area of ​​the area to be filled, and determine the center point position of the connected region; wherein, the connected region includes the area of ​​the color filter pad material to be filled and the known area; The height determination module is used to determine the height of the color film padding material based on the first height value of the point cloud data set corresponding to the center point of the connected region and the second height value of the point cloud data set corresponding to the reference object. Also includes: The height values ​​of each pixel in the region to be supplemented are predicted by binomial fitting using the 3D point cloud data corresponding to the known regions in the connected region. The volume of the color filter pad is determined based on the height values ​​of each pixel in the entire connected region after the point-filling process, specifically: Map the height value of each pixel in the region to be filled to a gray value between 0 and 255, and update the initial two-dimensional grayscale image to obtain the target two-dimensional grayscale image; The target two-dimensional grayscale image is binarized to segment the area where the color filter pad is located, thus obtaining the target area; The volume of the color filter pad is obtained by subtracting the second height value from the height value of each pixel in the target area and then adding the results.

7. A device for measuring the basic parameters of colored film padding, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for measuring the basic parameters of the color filter pad as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method for measuring the basic parameters of the color filter pad as described in any one of claims 1 to 5.

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