Quality detection method, device and medium for projection light machine

Abstract

The present disclosure provides a quality detection method and device of a projection light machine and a medium. The method comprises: in a first test of projecting a test picture, collecting a first test picture at a plurality of first time points to obtain a plurality of first test images; for each first time point, determining a detection value at a plurality of test regions according to the first test image of the first time point to obtain a plurality of first detection values corresponding to the first time point; for adjacent time points in the plurality of first time points, obtaining detection data corresponding to the adjacent time points according to the plurality of first detection values of the adjacent time points; determining a first stable time point according to the plurality of detection data corresponding to the plurality of adjacent time points; in a second test of projecting the test picture, collecting the second test picture at a plurality of second time points before the first stable time point to obtain a plurality of second test images; and determining a quality detection result of the projection light machine according to the plurality of second test images.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to the technical field of projection light machines, and more particularly, to a quality detection method of a projection light machine, a quality detection device of a projection light machine, and a computer readable storage medium. BACKGROUND

[0002] With the development of science and technology, the projection quality of the projection light machine is continuously improved. In order to guarantee the reliability of the projection quality, the person skilled in the art often pre-stores pictures on the projection light machine, and detects the projection quality of the projection light machine through the images projected by the pre-stored pictures. For example, the projection quality of the projection light machine is detected by comparing the color saturation, contrast, brightness and other numerical values of the projected images and the pre-stored pictures.

[0003] However, when detecting the projection quality of the projection light machine, the test environment and the projection light machine may jointly affect the projection quality. For example, due to the influence of temperature on the LED lamp of the projection light machine, the thermal balance of the projection light machine reaches a corresponding degree before stabilizing. For another example, due to the assembly problem of the light machine itself, the inclination degree of the relative projection plane is different, and the sensitivity of the light machine is different. For another example, whether the ambient temperature of the test environment remains constant during the test process. In this case, the result of the quality detection often cannot objectively evaluate the projection quality of the projection light machine, and it is more difficult for the user to select the product with the best quality from multiple projection light machines.

[0004] Therefore, it is urgent to provide a quality detection method of a projection light machine to accurately reflect the imaging quality of the projection light machine. SUMMARY

[0005] An object of embodiments of the present disclosure is to provide a new technical solution for quality detection of a projection light machine.

[0006] According to a first aspect of embodiments of the present disclosure, a quality detection method of a projection light machine is provided, and the method comprises:

[0007] In a first test process in which the projection light machine projects and displays a first test picture, the first test picture is collected at a plurality of first sampling time points to obtain a plurality of first test images;

[0008] For each first sampling time point, a detection value of the projection light machine at a plurality of test regions is determined according to the first test image corresponding to the first sampling time point, to obtain a plurality of first detection values corresponding to the first sampling time point;

[0009] For adjacent sampling time points in the plurality of first sampling time points, according to the plurality of first detection values of the adjacent sampling time points, detection data corresponding to the adjacent sampling time points is obtained; wherein the detection data comprises a difference value of the first detection value of each test region at the adjacent sampling time points;

[0010] According to a plurality of detection data corresponding to a plurality of adjacent sampling time points, a first stable time point of the projection light machine is determined;

[0011] In a second test process in which the projection light machine projects and displays a second test picture, a plurality of second sampling time points before the first stable time point are used to collect the second test picture respectively, and a plurality of second test images are obtained;

[0012] According to the plurality of second test images, a quality detection result of the projection light machine is determined

[0013] Optionally, the quality detection result of the projection light machine is obtained according to the plurality of second test images, comprising:

[0014] For each second sampling time point, a second detection value of the projection light machine at a first test region in the plurality of test regions is determined through a second test image corresponding to the second sampling time point, and a plurality of second detection values corresponding one-to-one to the plurality of second sampling time points are obtained;

[0015] According to the change of the plurality of second detection values, the quality detection result of the projection light machine is determined.

[0016] Optionally, the quality detection result of the projection light machine is determined according to the change of the plurality of second detection values, comprising:

[0017] According to the change of the plurality of second detection values, a second stable time point of the projection light machine is obtained; wherein the second stable time point is a second sampling time point at which a change amount of the plurality of second detection values starting from the second sampling time point is less than or equal to a set threshold value;

[0018] According to the change of the plurality of second detection values, a maximum difference value of the plurality of second detection values is obtained;

[0019] According to the second stable time point and the maximum difference value, the quality detection result of the projection light machine is determined.

[0020] Optionally, the first test picture and the second test picture are the same picture.

[0021] Optionally, the plurality of test regions include a test region at a projection center of the projection light machine, at least one test region of a projection region at an upper left corner of the projection center, at least one test region of a projection region at a lower left corner of the projection center, at least one test region of a projection region at an upper right corner of the projection center, and at least one test region of a projection region at a lower right corner of the projection center.

[0022] Optionally, the first detection value is a modulus transfer function value of a lens module of the projection light machine.

[0023] According to a second aspect of the embodiments of the present disclosure, a quality detection device of a projection light machine is provided, and the device comprises:

[0024] The acquisition module is configured to acquire the first test picture at a plurality of first sampling time points in a first test process in which the projection light machine projects and displays a first test picture, and obtain a plurality of first test images;

[0025] The detection module is configured to, for each first sampling time point, determine a detection value of the projection light machine at a plurality of test regions according to a first test image corresponding to the first sampling time point, and obtain a plurality of first detection values corresponding to the first sampling time point;

[0026] The calculation module is configured to, for adjacent sampling time points in the plurality of first sampling time points, obtain detection data corresponding to the adjacent sampling time points according to the plurality of first detection values of the adjacent sampling time points, wherein the detection data includes a difference value of the first detection value of each test region at the adjacent sampling time points.

[0027] The determination module is configured to determine a first stable time point of the projection light machine according to a plurality of detection data corresponding to a plurality of adjacent sampling time points.

[0028] The acquisition module is configured to acquire the second test picture at a plurality of second sampling time points before the first stable time point in a second test process in which the projection light machine projects and displays a second test picture, and obtain a plurality of second test images.

[0029] The determination module is configured to determine a quality detection result of the projection light machine according to the plurality of second test images.

[0030] According to a third aspect of the embodiments of the present disclosure, a quality detection device of a projection light machine is provided, and the projection light machine device further comprises:

[0031] The memory is configured to store executable computer instructions.

[0032] A processor configured to execute the quality detection method according to the first aspect.

[0033] According to a fourth aspect of the present disclosure, there is provided a computer readable storage medium having stored thereon computer instructions that, when executed by a processor, perform the method according to the first aspect.

[0034] An advantage of the embodiments of the present disclosure is that, before quality detection of the projection light machine, the test environment is determined not to affect the quality detection result through pre-testing of the first sample, and in this case, the quality detection of the projection light machine can avoid the influence of the test environment on the quality detection result of the projection light machine, and improve the accuracy of the quality detection. During the quality detection, the first stable time point is determined through the first detection, and then a plurality of second sampling time points are determined before the first stable time point, and the second test is performed, which can improve the accuracy of the quality detection of the projection light machine while improving the efficiency of the quality detection.

[0035] Other features of the present disclosure and advantages thereof will become more apparent from the following detailed description of exemplary embodiments with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0037] Figure 1 is a hardware configuration schematic diagram of a quality detection device of a projection light machine according to an embodiment of the present disclosure;

[0038] Figure 2 is a flow schematic diagram of a quality detection method of a projection light machine according to an embodiment of the present disclosure;

[0039] Figure 3 is a schematic diagram of a test area according to an embodiment of the present disclosure;

[0040] Figure 4 is a change diagram of a modulation function drop value of a first sample according to an embodiment of the present disclosure;

[0041] Figure 5 is a temperature change diagram of an LED lamp of a first sample according to an embodiment of the present disclosure;

[0042] Figure 6a is a change diagram of a modulation function of a test area of a plurality of test areas of a first sample according to an embodiment of the present disclosure;

[0043] Figure 6ba variation diagram of the modulation function of another one of the plurality of test regions of the first sample according to an embodiment of the present disclosure;

[0044] Figure 7 a variation diagram of the first detection value of the projection light machine according to an embodiment of the present disclosure;

[0045] Figure 8 a variation diagram of the fall value of the first detection value of the projection light machine according to an embodiment of the present disclosure;

[0046] Figure 9 a variation diagram of the second detection value of one of the test regions of different projection light machines according to an embodiment of the present disclosure;

[0047] Figure 10 a principle block diagram of the quality detection device of the projection light machine according to an embodiment of the present disclosure;

[0048] Figure 11 a hardware structure schematic diagram of the quality detection device of the projection light machine according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0049] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement, numerical expressions, and numerical values of the components and steps set forth in these embodiments are not limiting to the scope of the embodiments of the present disclosure unless otherwise specifically stated.

[0050] The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0051] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the description if appropriate.

[0052] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0053] It should be noted that like numbers and letters refer to like items throughout the drawings, and once an item is defined in one drawing, it should not require further discussion in subsequent drawings.

[0054] <Hardware Configuration>

[0055] Figure 1 is a structure schematic diagram of an electronic device that can be used to implement the embodiments of the present disclosure.

[0056] The electronic device 1000 can be a smart phone, a portable computer, a desktop computer, a tablet computer, a server, etc., which is not limited herein.

[0057] The electronic device 1000 can include, but is not limited to, a processor 1100, a memory 1200, an interface device 1300, a communication device 1400, a display device 1500, an input device 1600, a speaker 1700, a microphone 1800, etc. The processor 1100 can be a central processing unit CPU, a graphics processing unit GPU, a microprocessor MCU, etc., configured to execute a computer program, which can be written in an instruction set of an architecture such as x86, Arm, RISC, MIPS, SSE, etc. The memory 1200 can include, for example, a ROM (read only memory), a RAM (random access memory), a non-volatile memory such as a hard disk, etc. The interface device 1300 can include, for example, a USB interface, a serial interface, a parallel interface, etc. The communication device 1400 can be configured to perform wired communication using an optical fiber or a cable, or wireless communication, and can include, for example, WiFi communication, Bluetooth communication, 2G / 3G / 4G / 5G communication, etc. The display device 1500 can be, for example, a liquid crystal display screen, a touch display screen, etc. The input device 1600 can include, for example, a touch screen, a keyboard, a body-sensing input, etc. The speaker 1700 is configured to output an audio signal. The microphone 1800 is configured to acquire an audio signal.

[0058] In the embodiments of the present disclosure, the memory 1200 of the electronic device 1000 is configured to store a computer program configured to control the processor 1100 to perform operations to implement the method according to the embodiments of the present disclosure. The computer program can be designed by a skilled person according to the solutions disclosed in the present disclosure. How the computer program controls the processor to perform operations is known in the art, and thus will not be described in detail herein. The electronic device 1000 can be installed with an intelligent operating system (such as Windows, Linux, Android, IOS, etc.) and application software.

[0059] Those skilled in the art should understand that, although a plurality of devices of the electronic device 1000 are shown in Figure 1 the present disclosure, the electronic device 1000 of the embodiments of the present disclosure can only involve part of the devices, for example, only the processor 1100 and the memory 1200, etc.

[0060] In the following, various embodiments and examples according to the present disclosure are described with reference to the accompanying drawings.

[0061] <Method Embodiments>

[0062] Figure 2is a flowchart of a projection quality detection method of a projection light machine according to an embodiment, which can be implemented by an electronic device and a projection light machine to be detected together. For example, the electronic device can be an electronic device 1000 as shown in Figure 1

[0063] As shown in Figure 2 The projection quality detection method of the projection light machine provided by this embodiment can include the following steps S2100-S2600.

[0064] Step S2100, in a first test process in which the projection light machine projects and displays a first test picture, a plurality of first test pictures are collected at a plurality of first sampling time points, respectively, to obtain a plurality of first test images.

[0065] In this embodiment, in some scenarios, for example, before the projection light machine is shipped, a technician can perform quality detection on the image projected by the projection light machine on the screen to determine whether the projection quality of the projection light machine is qualified. Also for example, in the case where a user needs to compare the projection qualities of a plurality of different types of projection light machines to select the projection light machine with the best quality, quality detection can be performed on the different types of projection light machines to select the projection light machine with the best quality. In these scenarios, quality detection needs to be performed on the projection light machine. Those skilled in the art should understand that the quality detection scenarios of the projection light machine here are only exemplary descriptions of the present application and cannot be regarded as a limitation of the present application.

[0066] In one embodiment, before the quality detection of the projection light machine, the first sample is pre-tested.

[0067] In this embodiment, before the quality detection of the projection light machine, any projection light machine can be randomly selected for pre-testing to detect whether the test environment is qualified. For ease of description, the randomly selected projection light machine is marked as a first sample here.

[0068] In one embodiment, the first sample can be pre-tested by a modulation transfer function.

[0069] In this embodiment, before the pre-testing of the first sample by the modulation transfer function, a plurality of test regions can be selected for the first sample, wherein the plurality of test regions include a test region located at a projection center of the first sample, at least one test region located at a projection region of an upper left corner of the first sample, at least one test region located at a projection region of a lower left corner of the projection center, at least one test region located at a projection region of an upper right corner of the projection center, and at least one test region located at a projection region of a lower right corner of the projection center.

[0070] ​That is, before the pre-test starts, a plurality of test regions can be selected for the first sample. For example, 26 test regions as shown in FIG. 26 can be selected. Figure 3

[0071] In addition, before the pre-test starts, in the case that the electronic device establishes a communication connection with the first sample, the user can set the total duration of the pre-test and a plurality of third sampling time points by operating the electronic device.

[0072] During the pre-test, the first sample projects and displays a third test picture, and the electronic device acquires a plurality of sets of third test images of the first sample projecting and displaying the third test picture at the plurality of third sampling time points. After acquiring the plurality of sets of third test images, the electronic device can acquire the modulation transfer function values of each third test image in the plurality of test regions, thereby obtaining a plurality of sets of modulation transfer function values of the plurality of sets of third test images.

[0073] For example, the plurality of third sampling time points are 0, 3, 5, 8, 10, 13, and 15 minutes, and the plurality of test regions are the 26 test regions selected above, thereby obtaining a plurality of sets of modulation transfer function values of the plurality of sets of third test images. Moreover, taking the 26 test regions as the horizontal coordinates and the drop values of the modulation transfer function values of 【0-3】, 【3-5】, 【5-8】, 【8-10】, 【10-13】, and 【13-15】 minutes as the vertical coordinates, a drop value image of the modulation transfer function values of the 26 positions is drawn, as shown in FIG. 27. It can be seen that the drop values of the time periods corresponding to the dashed lines are within 1, that is, the drop value of the curve of 【8-10】 minutes is within 1, and has tended to be stable. Figure 4

[0074] In order to determine whether the temperature of the LED lamp will affect the change of the modulation transfer function value during the pre-test. In an embodiment, during the pre-test of the first sample, the temperature of the LED lamp of the first sample is acquired at the plurality of third sampling time points.

[0075] Specifically, a thermosensitive element such as a thermistor can be arranged at the LED lamp of the first sample to detect the temperature of the LED lamp. During the pre-test, the electronic device can acquire the temperature value according to the plurality of third sampling time points to detect the temperature change of the LED lamp during the pre-test.

[0076] For example, the first sample is a 4-LED projection light machine, and a thermosensitive element can be arranged for each of the 4 LED lamps. Moreover, the total duration of the pre-test is 15 minutes, and the third sampling time points are set to be 0, 3, 5, 8, 10, 13, and 15 minutes, 10 temperature data are acquired at each of the third sampling time points, and then a curve graph is generated with the horizontal coordinates being the temperature measurement times and the vertical coordinates being the temperatures. The curve graph is as shown in FIG. 28.​​Figure 5 As shown in the figure, the temperature of the LED lamp is stable after 3 minutes. Figure 5 It can be seen that the temperature of the four LED lamps is basically stable within 3 minutes.

[0077] It can be seen that the drop value of the modulation transfer function is stable after the temperature of the LED lamp is stable, which indicates that other factors cause the change of the modulation transfer function value. Through some experimental analysis, it can be concluded that the thermal expansion and contraction of the lens module of the projection light machine has a certain process, and the stable time of the lens module is close to 10 minutes.

[0078] According to the embodiment of the present application, in the pre-test process, the temperature of the LED lamp is detected, and then the time when the temperature of the LED lamp is stable is determined, and the stable time of the modulation transfer function is compared with the stable time of the modulation transfer function, so that it can be determined that the change of the modulation transfer function value is irrelevant to the temperature of the LED lamp.

[0079] In one embodiment, in order to avoid the influence of improper selection of the plurality of test areas on the accuracy of quality detection, the embodiment of the present application further analyzes the modulation transfer function value of each test area in the pre-test process.

[0080] In the embodiment of the present application, the electronic device can also generate the change of the measurement times of each test area after the pre-test is completed. For example, in the pre-test process, three third test images can be taken at each third sampling time. That is, three third test images are taken at 0, 3, 5, 8, 10, 13 and 15 minutes, and a total of 21 third test images are obtained. For each test area in the 26 test areas of each third test image, the modulation transfer function value is obtained. And generate the curve graph with the measurement times (21 times) as the horizontal coordinate and the modulation transfer function values of any two test areas in the 26 test areas as the vertical coordinate, it can be concluded that the modulation transfer function values of the two test areas have the trend of increasing or decreasing with time.

[0081] According to the embodiment of the present application, in the pre-test process, by analyzing the change of the modulation transfer function value with the measurement time for each test area in the plurality of test areas, it can be determined whether the plurality of test areas are selected improperly, so as to avoid the influence of improper selection of the test area on the accuracy of quality detection.

[0082] In one embodiment, the first sample is pre-tested for multiple times, and after each pre-test is completed, the next pre-test is performed after the first sample is naturally cooled, and in the process of each pre-test, the environmental temperature is kept constant.

[0083] In this embodiment, the first sample can be pre-tested three times, and after each pre-test, the first sample needs to be naturally cooled before the next pre-test. During the pre-test, the ambient temperature is kept at 25 degrees Celsius.

[0084] According to the embodiments of the present application, by pre-testing the first sample multiple times, the problem of inaccurate test results caused by accidental factors can be avoided. By keeping the ambient temperature constant during pre-testing, the influence of the ambient temperature on the test results can be avoided, and the accuracy of the pre-test can be improved.

[0085] After determining that the test environment has no effect on the quality detection results through pre-testing, quality detection of the projection light machine can be performed. The quality detection of the projection light machine includes first testing and second testing. Before the first testing of the projection light machine, if the electronic device and the projection light machine establish a communication connection, the user can input the total duration and the time interval of the first testing through the electronic device. After receiving the total duration and the time interval of the first testing input by the user, the electronic device can determine a plurality of first sampling times according to the total duration and the time interval.

[0086] For example, the user can input the total duration of the first testing as 15 minutes and the time interval as 3 minutes. The electronic device can determine a plurality of first sampling times as 0, 3, 5, 8, 10, 13, and 15 minutes according to the total duration of 15 minutes and the time interval of 3 minutes.

[0087] After determining the plurality of first sampling times, the user can control the projection light machine to project and display a first test picture through the electronic device, and start the first testing. The first test picture can be a picture pre-stored in the projection light machine before leaving the factory, or a picture sent by the electronic device to the projection light machine when the projection light machine and the electronic device establish a communication connection. It should be understood by those skilled in the art that the specific source of the first test picture is not limited here.

[0088] During the first testing of the projection light machine projecting and displaying the first test picture, the camera of the electronic device collects the first test picture at the set plurality of first sampling times to obtain a plurality of first test images.

[0089] Step S2200, for each first sampling time, determining the detection value of the projection light machine at the set plurality of test regions according to the first test image corresponding to the first sampling time, to obtain a plurality of first detection values corresponding to the first sampling time.

[0090] In this embodiment, the electronic device can obtain a plurality of test regions after obtaining the plurality of groups of first test images, and determine a group of first detection values of the plurality of test regions of one of the first test images according to the plurality of test regions, so as to obtain a plurality of groups of first detection values corresponding to the plurality of groups of first test images.

[0091] In one embodiment, the first detection value is a modulation transfer function value of a lens module of the projection light machine.

[0092] In this embodiment, the number of black line pairs and white line pairs in each test region in the plurality of test regions in the first test image can be obtained, and the percentage of black line pairs and white line pairs can be calculated to obtain the first detection value of each test region of the first test image.

[0093] For example, the sampling time of the first test can be set as 0, 3, 5, 10, and 15 minutes, and the plurality of test regions of the first test can be the 26 test regions of the pre-test. After the camera of the electronic device obtains five first test images corresponding to the five time points, 26 first detection values of the 26 test regions of each first test image can be determined, and the 26 first detection values can be taken as a group of first detection values. Finally, five groups of first detection values corresponding to the five time points can be obtained. As shown in Figure 7 , which is a variation diagram of the five groups of first detection values corresponding to the five time points.

[0094] In step S2300, for adjacent sampling time points in the plurality of first sampling time points, a detection data corresponding to the adjacent sampling time points is obtained according to the plurality of first detection values of the adjacent sampling time points; wherein the detection data includes a difference value of the first detection value of each test region at the adjacent sampling time points.

[0095] In step S2400, a first stable time point of the projection light machine is determined according to a plurality of detection data corresponding to a plurality of adjacent sampling time points.

[0096] In this embodiment, after obtaining a group of first detection values corresponding to each first sampling time point, a difference value of two groups of first detection values of adjacent first sampling time points at corresponding test regions can be obtained to obtain detection data corresponding to adjacent sampling time points. The electronic device can determine a first stable time point of the projection light machine according to a plurality of detection data corresponding to a plurality of adjacent sampling time points.

[0097] In one embodiment, a first threshold value can be preset, and in a case where a plurality of detection data corresponding to a first adjacent sampling time point in a plurality of detection data corresponding to a plurality of adjacent sampling time points is less than or equal to the first threshold value, the first adjacent sampling time point is determined as the first stable time point.

[0098] In this embodiment, in the plurality of detection data corresponding to the plurality of adjacent sampling time points, there can be a case that the plurality of detection data corresponding to the plurality of first adjacent sampling time points are all less than or equal to the first threshold value. In this case, the relatively smaller one of the plurality of first adjacent sampling time points can be determined as the first stable time point.

[0099] For example, the first detection values of the 26 test regions at time 3 and the first detection values of the 26 test regions at time 0 can be subtracted to obtain the detection data of the period 【0-3】. Similarly, the detection data of the periods 【3-5】, 【5-8】, 【8-10】, 【10-13】, 【13-15】 can also be obtained. After obtaining the plurality of detection data, the detection data corresponding to the 26 detection regions can be obtained. As shown in the curve diagram, Figure 8 The abscissa of the curve diagram is the 26 test regions, and the ordinate is the detection data of the adjacent sampling time points. It can be seen from the curve diagram that the first stable time point is the period of 【8-10】 minutes.

[0100] S2500, in the second test process of projecting and displaying the second test picture by the projection light machine, a plurality of second sampling time points before the first stable time point are respectively collected to obtain a plurality of second test images.

[0101] In this embodiment, after the first stable time point of the projection light machine is determined through the first test, the projection light machine can be tested. Before the second test, the electronic device can determine a plurality of second sampling time points before the first stable time point according to the first stable time point. For example, in the case of the first stable time point being 【8-10】, the time points before 8 minutes can be divided to determine a plurality of second sampling time points. For example, the time points of 1, 2, 3, 4, 5, 6, and 7 minutes before 7 minutes can be taken as the second sampling time points.

[0102] After the plurality of second sampling time points are determined, the projection light machine can be controlled to project and display a second test picture to start the second test. The second test picture can be different from the first test picture. The second test picture can also be the same as the first test picture. Those skilled in the art should understand that the specific type and source of the second test picture are not limited here.

[0103] In the second test process, the camera of the electronic device can collect the second test picture at a plurality of second sampling time points to obtain a plurality of second test images.

[0104] S2600, determining a quality detection result of the projection light machine according to the plurality of second test images.

[0105] In this embodiment, the electronic device can determine the quality detection result of the projection light machine according to the multiple groups of second test images.

[0106] According to the embodiments of the present application, before the quality detection of the projection light machine, the test environment is determined not to affect the quality detection result through the pre-test of the first sample. In this case, the quality detection of the projection light machine can avoid the influence of the test environment on the quality detection result of the projection light machine, and improve the accuracy of the quality detection. During the quality detection, the first stable time point is determined through the first detection, and then the multiple second sampling time points are determined before the first stable time point, and the second test is performed. In this way, the accuracy of the quality detection of the projection light machine can be improved, and the efficiency of the quality detection can be improved.

[0107] In one embodiment, the quality detection result of the projection light machine is obtained according to the multiple groups of second test images, including:

[0108] S3100, for each second sampling time point, a second detection value of the projection light machine at a first test region in the multiple test regions is determined through the second test image corresponding to the second sampling time point, and multiple second detection values corresponding to the multiple second sampling time points are obtained.

[0109] In this embodiment, after obtaining the multiple groups of second test images, the user can select a first test region from the multiple test regions. After receiving the first test region, the electronic device can obtain the percentage of the number of black line pairs and the number of white line pairs in the first test region in each second test image, and obtain the second detection values of the multiple first test regions corresponding to the multiple second sampling time points. For example, a test region located at the projection center of the projection light machine can be selected as the first test region, and the second test value of the center test region is obtained.

[0110] S3200, the quality detection result of the projection light machine is determined according to the change of the multiple second detection values.

[0111] In one embodiment, the quality detection result of the projection light machine is determined according to the change of the multiple second detection values, including:

[0112] S4100, a second stable time point of the projection light machine is obtained according to the change of the multiple second detection values, wherein the second stable time point is a second sampling time point at which the change amount of the multiple second detection values starts from the second sampling time point and is less than or equal to a set threshold.

[0113] S4200, obtaining a maximum difference value of the second detection values according to the change of the second detection values.

[0114] S4300, determining the quality detection result of the projection light machine according to the second stable time point and the maximum difference value.

[0115] In the embodiment, a second threshold value can be preset, and in a case where a change amount of the second detection values from the time is less than or equal to the second threshold value, a second sampling time corresponding to the time is determined as the second stable time point. After the second stable time point is obtained, the maximum difference value of the second detection values is obtained according to the change of the second detection values. Finally, the quality detection result of the projection light machine is determined according to the second stable time point and the maximum difference value. In a case where the second stable time point is smaller and the maximum difference value is smaller, the quality of the projection light machine is better.

[0116] For example, after the quality of a plurality of projection light machines is detected, a relationship between the second detection values and the second sampling time is as shown in FIG. 4. Figure 9 It can be seen from the figure that the projection light machine corresponding to the highest curve has the smallest maximum difference value, and tends to be stable at a smaller time earlier than other curves, that is, the second stable time point is smaller, and therefore, it can be determined that the quality of the projection light machine corresponding to the curve is relatively good.

[0117] According to the embodiment of the present application, the quality detection result of the projection light machine is determined according to the second stable time point and the maximum difference value, which can further improve the accuracy of the quality detection of the projection light machine, and is convenient for a user to select the projection light machine with the best quality from a plurality of projection light machines.

[0118] In one embodiment, the first test picture and the second test picture are the same picture.

[0119] In the embodiment, because the test pictures used in the first test and the second test of the quality detection are different, a case where the second stable time point does not appear before the first stable time point in the second test, or the maximum difference value of the second detection values is always less than or equal to the second threshold value, can occur. In this case, the quality detection result of the projection light machine cannot be accurately determined.

[0120] In order to avoid the influence of the change of the test picture on the accuracy of the quality detection result, the second test picture and the first test picture in the embodiment of the present application are the same picture.

[0121] According to the embodiment of the present application, the first test picture and the second test picture are the same arc, which can avoid the influence of the change of the test picture on the accuracy of the quality detection result.

[0122] <Device embodiments>

[0123] The embodiments of the present disclosure provide a quality detection device of a projection light machine, as shown in the figure, the quality detection device 600 of the projection light machine can include a collection module 610, a detection module 620, a calculation module 630, and a determination module 640. Figure 10

[0124] The collection module 610 is configured to collect the first test picture at a plurality of first sampling time points in a first test process in which the projection light machine projects and displays a first test picture, to obtain a plurality of first test images.

[0125] The detection module 620 is configured to, for each first sampling time point, determine a detection value of the projection light machine at a plurality of test regions according to a first test image corresponding to the first sampling time point, to obtain a plurality of first detection values corresponding to the first sampling time point.

[0126] The calculation module 630 is configured to, for adjacent sampling time points in the plurality of first sampling time points, obtain detection data corresponding to the adjacent sampling time points according to the plurality of first detection values of the adjacent sampling time points, wherein the detection data includes a difference value of the first detection value of each test region at the adjacent sampling time points.

[0127] The determination module 640 is configured to determine a first stable time point of the projection light machine according to a plurality of detection data corresponding to a plurality of adjacent sampling time points.

[0128] The collection module 610 is configured to collect the second test picture at a plurality of second sampling time points before the first stable time point in a second test process in which the projection light machine projects and displays a second test picture, to obtain a plurality of second test images.

[0129] The determination module 640 is configured to determine a quality detection result of the projection light machine according to the plurality of second test images.

[0130] According to the embodiments of the present disclosure, before the quality detection of the projection light machine, the pre-test of the first sample is performed to determine that the test environment will not affect the quality detection result, and in this case, the quality detection of the projection light machine is performed again, which can avoid the influence of the test environment on the quality detection result of the projection light machine and improve the accuracy of the quality detection. During the quality detection, the first stable time point is determined through the first detection, and then a plurality of second sampling time points are determined before the first stable time point, and the second test is performed, which can improve the accuracy of the quality detection of the projection light machine while improving the efficiency of the quality detection.

[0131] ​In an embodiment, the determining module 640 is specifically configured to, for each second sampling time, determine a second detection value of the projection light machine at a first test region in the plurality of test regions through a second test image corresponding to the second sampling time, to obtain a plurality of second detection values corresponding to the plurality of second sampling times; and determine the quality detection result of the projection light machine according to a variation of the plurality of second detection values.

[0132] In an embodiment, the determining module 640 is specifically configured to obtain a second stable time point of the projection light machine according to the variation of the plurality of second detection values; wherein the second stable time point is a second sampling time at which a variation of the plurality of second detection values starting from the second sampling time is less than or equal to a set threshold; obtain a maximum difference value of the plurality of second detection values according to the variation of the plurality of second detection values; and determine the quality detection result of the projection light machine according to the second stable time point and the maximum difference value.

[0133] According to the embodiments of the present application, the quality detection result of the projection light machine is determined according to the second stable time point and the maximum difference value, which can further improve the accuracy of the quality detection of the projection light machine, and facilitate the user to select the projection light machine with the best quality from a plurality of projection light machines.

[0134] In an embodiment, the first test picture and the second test picture are the same picture.

[0135] According to the embodiments of the present application, the first test picture and the second test picture are the same arc, which can avoid the influence of the variation of the test picture on the accuracy of the quality detection result.

[0136] In an embodiment, the plurality of test regions include a test region at a projection center of the projection light machine, at least one test region at a projection region at a top left corner of the projection center, at least one test region at a projection region at a bottom left corner of the projection center, at least one test region at a projection region at a top right corner of the projection center, and at least one test region at a projection region at a bottom right corner of the projection center.

[0137] In an embodiment, the first detection value is a modulation transfer function value of a lens module of the projection light machine.

[0138] <Device Embodiment>

[0139] Figure 11 FIG. 1 is a hardware structure schematic diagram of a quality detection device of a projection light machine according to an embodiment. As shown in FIG. 1, the quality detection device of the projection light machine includes a first sampling module 610, a second sampling module 620, a determining module 640, and a display module 650. Figure 11As shown, the quality detection device 700 of the projection light machine includes a display screen 710 and a camera module 720, and further includes a processor 730 and a memory 740.

[0140] The memory 740 can be used to store executable computer instructions.

[0141] The processor 730 can be used to execute the quality detection method of the projection light machine according to the executable computer instructions.

[0142] The quality detection device 700 of the projection light machine can be an electronic device 1000 as shown, or can be a device with other hardware structures, which is not limited herein. The quality detection device 700 of the projection light machine can be a mobile phone, a notebook computer, a desktop computer, etc., which is not limited in the embodiments of the present disclosure. Figure 1

[0143] <Computer readable storage medium>

[0144] The embodiments of the present disclosure further provide a computer readable storage medium having computer instructions stored thereon, and the computer instructions are run by a processor to execute the quality detection method of the projection light machine provided by the embodiments of the present disclosure.

[0145] The present disclosure can be a system, a method, and / or a computer program product. The computer program product can include a computer readable storage medium having computer readable program instructions embodied therewith, and the computer readable program instructions are used to cause a processor to implement various aspects of the present disclosure.

[0146] The computer readable storage medium can be a tangible device that can retain and store instructions for use by an instruction execution device. The computer readable storage medium can be, for example, but is not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium include the following: a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanism that can store and read instructions such as one or more of the following: a punch card, an eddy current card, a magnetic strip on a card, a magnetic strip on a passport, or a machine readable fingerprint; and any suitable combination of the foregoing. The computer readable storage medium is not to be interpreted as a transitory signal per se, such as a radio wave or other freely propagating electromagnetic wave, an electromagnetic wave propagating through a waveguide or other transmission media (e.g., light pulses passing through a fiber-optic cable), or an electrical signal passing through a wire.

[0147] ​Computer readable program instructions described herein can be downloaded to respective computing / processing devices from a computer readable storage medium or to an external computer or external storage device via a network, for example, the Internet, a local area network, a wide area network and / or a wireless network. The network can comprise copper transmission cables, optical transmission fibers, wireless transmission, routers, firewalls, switches, gateway computers and / or edge servers. A network adapter card or network interface in each computing / processing device receives computer readable program instructions from the network and forwards the computer readable program instructions for storage in a computer readable storage medium within the respective computing / processing device.

[0148] Computer readable program instructions for carrying out operations of the present disclosure can be assembler instructions, instruction-set-architecture (ISA) instructions, machine instructions, machine dependent instructions, microcode, firmware instructions, state-setting data, or either source code or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C++ or the like, and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The computer readable program instructions can execute entirely on the user's computing / processing device, partly on the user's computing / processing device, as a stand-alone software package, partly on the user's computing / processing device and partly on a remote computing / processing device or entirely on the remote computing / processing device or server. In the latter scenario, the remote computing / processing device can be connected to the user's computing / processing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computing / processing device, for example, through the Internet using an Internet Service Provider. In some embodiments, electronic circuitry including, for example, programmable logic circuitry, field-programmable gate arrays (FPGA), or programmable logic arrays (PLA) can execute the computer readable program instructions by utilizing state information of the computer readable program instructions to personalize the electronic circuitry, in order to perform aspects of the present disclosure.

[0149] The computer readable program instructions can also be loaded onto a computing / processing device, other programmable data processing apparatus, or other device to cause a series of operations to be performed on the computing / processing device, other programmable apparatus or other device to produce a computer implemented process, such that the instructions which execute on the computing / processing device, other programmable apparatus, or other device implement the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0150] These computer readable program instructions can be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions / acts specified in the flowchart and / or block diagram block or blocks. These computer readable program instructions can also be stored in a computer readable storage medium that can include a non-transitory computer readable storage medium that can be a computer- readable storage medium having no data, programs, program modules, e.g., instructions for operation, or digital content stored thereon or therein for a short time or not at all. The computer readable storage medium can also have instructions stored thereon or therein which may

[0151] The computer readable program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other device to produce a computer implemented process, such that the instructions which execute on the computer, other programmable data processing apparatus, or other device implement the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0152] The computer readable program instructions can also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other device to produce a computer implemented process, such that the instructions which execute on the computer, other programmable data processing apparatus, or other device implement the functions / acts specified in the flowchart and / or block diagram block or blocks.

[0153] Having described above several embodiments of the disclosure, any modifications and variations that fall within the scope of the described embodiments are also contemplated by the inventor(s). As such, the foregoing description is not intended to limit the scope of the disclosure, and it is recognized that modifications are contemplated which can provide one or more benefits and which are within the scope of the disclosure. The disclosure is defined by the appended claims.

Claims

1. A quality detection method of a projection light machine, characterized in that, The method comprises: In a first test process in which the projection light machine projects and displays a first test picture, a plurality of first test pictures are collected at a plurality of first sampling time points respectively, to obtain a plurality of groups of first test images; For each first sampling time point, a plurality of first detection values of the projection light machine at a plurality of test regions corresponding to the first sampling time point are determined according to the first test image corresponding to the first sampling time point, to obtain a plurality of first detection values corresponding to the first sampling time point; For adjacent sampling time points in the plurality of first sampling time points, detection data corresponding to the adjacent sampling time points is obtained according to the plurality of first detection values of the adjacent sampling time points; wherein the detection data comprises a difference value of the first detection value of each test region at the adjacent sampling time points; A first stable time point of the projection light machine is determined according to a plurality of detection data corresponding to a plurality of adjacent sampling time points; In a second test process in which the projection light machine projects and displays a second test picture, a plurality of second test pictures are collected at a plurality of second sampling time points before the first stable time point respectively, to obtain a plurality of groups of second test images; A quality detection result of the projection light machine is determined according to the plurality of groups of second test images.

2. The method of claim 1, wherein, The determination of the quality detection result of the projection light machine according to the plurality of groups of second test images comprises: For each second sampling time point, a second detection value of the projection light machine at a first test region in the plurality of test regions is determined through the second test image corresponding to the second sampling time point, to obtain a plurality of second detection values corresponding to the plurality of second sampling time points one by one; The quality detection result of the projection light machine is determined according to the change of the plurality of second detection values.

3. The method of claim 2, wherein, The determination of the quality detection result of the projection light machine according to the change of the plurality of second detection values comprises: A second stable time point of the projection light machine is obtained according to the change of the plurality of second detection values; wherein the second stable time point is a second sampling time point at which a change amount of the plurality of second detection values starting from the second sampling time point is less than or equal to a set threshold value; A maximum difference value of the plurality of second detection values is obtained according to the change of the plurality of second detection values; The quality detection result of the projection light machine is determined according to the second stable time point and the maximum difference value.

4. The method according to any one of claims 1 to 3, characterized in that, The first test picture and the second test picture are the same picture.

5. The method according to any one of claims 1 to 3, characterized in that, The plurality of test regions comprises a test region at a projection center of the projection light machine, at least one test region at a projection region at an upper left corner of the projection center, at least one test region at a projection region at a lower left corner of the projection center, at least one test region at a projection region at an upper right corner of the projection center, and at least one test region at a projection region at a lower right corner of the projection center.

6. The method according to any one of claims 1 to 3, characterized in that, The first detection value is a modulation transfer function value of a lens module of the projection light machine.

7. A quality inspection apparatus for a projection optical machine, characterized by comprising: The device comprises: a collection module, configured to collect a plurality of first test pictures at a plurality of first sampling time points respectively in a first test process in which the projection light machine projects and displays a first test picture, to obtain a plurality of groups of first test images; The detection module is configured to, for each first sampling time, determine, according to a first test image corresponding to the first sampling time, a detection value of the projection light machine at a set plurality of test regions, to obtain a plurality of first detection values corresponding to the first sampling time. The calculation module is configured to, for adjacent sampling times in the plurality of first sampling times, obtain detection data corresponding to the adjacent sampling times according to the plurality of first detection values of the adjacent sampling times, wherein the detection data includes a difference value of the first detection value of each test region at the adjacent sampling times. The determination module is configured to determine a first stable time point of the projection light machine according to a plurality of detection data corresponding to a plurality of adjacent sampling times. The acquisition module is configured to, in a second test process in which the projection light machine projects and displays a second test picture, acquire the second test picture at a plurality of second sampling times before the first stable time point, to obtain a plurality of second test images. The determination module is configured to determine a quality detection result of the projection light machine according to the plurality of second test images.

8. The apparatus of claim 7, wherein, The determination module is specifically configured to, for each second sampling time, determine, through a second test image corresponding to the second sampling time, a second detection value of the projection light machine at a first test region in the plurality of test regions, to obtain a plurality of second detection values corresponding one-to-one to the plurality of second sampling times, and determine the quality detection result of the projection light machine according to a change of the plurality of second detection values.

9. A quality inspection apparatus for a projection exposure machine, characterized by The quality detection device of the projection light machine includes: A memory configured to store executable computer instructions; A processor configured to execute the quality detection method according to any one of claims 1-6 according to control of the executable computer instructions.

10. A computer-readable storage medium, characterized in that, A computer program product, having computer instructions stored thereon, the computer instructions being executed by a processor to perform the method of any one of claims 1-6.

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