TW201314350A - Method and system for exposing test - Google Patents

Abstract

The present invention provides a method and system for testing exposure. The method includes: setting a camera equipment to non-automatic exposure mode; controlling the camera equipment to have a photograph corresponding to a different display brightness of a control data, reading every photograph' brightness value before exposure, storing the brightness values before exposure to a standard file; setting the camera equipment to automatic exposure mode; corresponding to a different display brightness of the control data, controlling the camera equipment to have a photograph corresponding to the current display brightness, reading the photograph's brightness value after exposure, analyzing the photograph's brightness value after exposure with the corresponding photograph's brightness value before exposure in the standard file to get a result; determining whether the result in accordance with an established rule, if it accords and the display brightness does not appear completely, controlling the camera equipment to have the next photograph to analysis until the display brightness appears completely.

Description

Exposure test method and system

The present invention relates to an exposure test method and system, and more particularly to an exposure test method and system in an image pickup apparatus.

In modern life, with the provision of social consumption standards, corporate and personal security awareness, more and more camera equipment (cameras, video cameras, IP cameras, etc.) are integrated into people's daily lives. For the convenience of users, most camera devices have an automatic exposure function to make the brightness of the captured image moderate. Therefore, the detection of the automatic exposure function of the imaging device is indispensable.

In view of the above, it is necessary to provide an exposure test method and system for realizing automatic testing of the exposure function of the imaging device.

The exposure testing method includes the following steps: setting step 1: when the connectivity between the imaging device and the controllable light source device is good, setting the imaging device to a non-automatic exposure mode; and controlling the storing step: corresponding to the controllable light source device When the group displays different display brightness in the control data, the camera device is controlled to shoot, and the pre-exposure brightness value of the captured image is read, and the brightness values before each exposure are stored in a standard file; setting step 2: when non When the display brightness corresponding to the group of control data selected in the automatic exposure mode is completed, the imaging device is set to the automatic exposure mode; the control comparison step is: when the display is different from the control data of the controllable light source device in the non-automatic exposure mode described above When the brightness is displayed one by one, the image capturing device controls an image corresponding to the current display brightness, and reads the post-exposure brightness value of the captured image, and the brightness value after the exposure and the corresponding pre-exposure brightness value in the standard file. Comparative analysis is performed to obtain a comparative analysis result of the brightness value before the exposure; Determining whether the comparison analysis result meets the established rule, when the comparison analysis result meets the established rule, performing a brightness determination step, otherwise, performing a stop step; and determining a brightness determination step: determining whether all display brightness in the group control data is displayed When the display brightness of all the display data in the group control data is completed, the display step is performed; otherwise, the return control comparison step continues to take the next image for comparative analysis; the stop step: controlling the camera device to stop shooting; displaying steps: displaying The test results are on the screen of the camera device.

The exposure test system includes: a setting module 1 configured to set the imaging device to a non-automatic exposure mode when the connectivity between the imaging device and the controllable light source device is good; and the control storage module is configured to be controllable When displaying the different display brightness in a group of control materials of the light source device, controlling the image capturing device to perform shooting, and reading the pre-exposure brightness value of the captured image, and storing the pre-exposure brightness values into a standard file; setting the mode In the second group, when the display brightness corresponding to the group of control data selected in the non-automatic exposure mode is completed, the camera device is set to the automatic exposure mode; and the control comparison module is used to control the mode in the non-automatic exposure mode. When the light source device displays the different display brightness in the same control data, the image is captured corresponding to the current display brightness control device, and the exposed brightness value of the captured image is read, and the brightness value after the exposure is Comparing and analyzing the corresponding pre-exposure brightness values in the standard file to obtain a comparative analysis result of the pre-exposure brightness values; a breaking module, configured to determine whether the comparison analysis result meets a predetermined rule; and a stopping module, configured to control the imaging device to stop shooting when the comparison analysis result does not meet the predetermined rule; the control comparison module, Further, when the comparison analysis result meets the established rule and all the display brightness in the group of control data is not displayed, the control camera device continues to take the next image for comparative analysis until all the displays in the group control data are displayed. The brightness display is completed; the display module is configured to display the test result on the screen of the imaging device when all display brightness in the group of control materials is displayed or after the camera device stops shooting.

Compared with the prior art, the exposure test method and system of the present invention introduces a controllable light source device, and in the case of different external light sources of the controllable light source device, respectively, in the non-automatic exposure mode and automatic exposure of the image capturing device In the mode, the image capturing device is controlled to take an image, and the brightness value of the imaged image is used for analysis, thereby realizing an intuitive and quick test of the automatic exposure function of the image capturing device.

As shown in FIG. 1, it is an architectural diagram of a preferred embodiment of the exposure test system of the present invention.

The exposure test system 10 operates in the image pickup apparatus 1. The imaging apparatus 1 further includes a screen 11 and a register 12 for displaying test results. The register 12 is used to store the brightness value of the image captured by the imaging apparatus 1. When the image pickup apparatus 1 captures an image, the brightness value of the captured image is automatically stored in the temporary memory 12. The buffer 12 stores only the brightness value of the current image at a time, that is, when the camera device 1 takes a new image, the brightness value of the new image is automatically stored in the temporary memory 12, the original image. The brightness value will be overwritten by the brightness value of the new image.

The imaging device 1 is connected to a controllable light source device 2. The controllable light source device 2 is used for analogy to an external lighting environment. The imaging device 1 and the controllable light source device 2 can be connected by USB, a serial port, a bus bar or the like. The environment in which the camera device 1 and the controllable light source device 2 are located should be protected from other external illumination environments, so that the external illumination environment of the analog light source device 2 is not disturbed.

The controllable light source device 2 includes a master wafer 20 and a display device 21. The main control chip 20 is formed by mounting a software body on the hardware. The main control chip 20 includes a plurality of sets of control data, and each set of control data includes a plurality of control commands. The main control chip 20 controls the display device 21 to perform brightness display according to a control command, and the display brightness of the display device 21 is different according to different control commands. The display device 21 is a light emitting device such as an LED lamp. For example, when the display device 21 is an LED lamp, the control command in the main control chip 20 is used to control the working quantity of the LEDs of the LED lamp, and the working quantities of different LEDs correspond to different LEDs. The display brightness of the lamp, that is, the LED lamp performs brightness display according to the control command.

As shown in FIG. 2, it is a functional module diagram of a preferred embodiment of the exposure test system of the present invention.

The exposure test system 10 includes a detection module 100, a setup module 101, a control storage module 102, a setup module 2, a control comparison module 104, a comparison result determination module 105, a brightness determination module 106, and a stop. Module 107 and display module 108.

The detection module 100 is configured to detect connectivity of the imaging device 1 and the controllable light source device 2.

The detecting module 100 sends a detection signal to the controllable light source device 2, and after receiving the detection signal, the main control chip 20 in the controllable light source device 2 sends a test signal to the display device 21, and the display device 21 receives the test signal. After the light source display. The light source display refers to a feedback mode after the display device 21 receives the test signal, such as performing blinking. When the main control chip 20 detects the light source of the display device 21, the main control chip 20 sends a feedback signal to the detection module 100, and the detection module 100 determines the connection between the imaging device 1 and the controllable light source device 2. Good sex.

When the connectivity between the imaging device 1 and the controllable light source device 2 is good, the setting module 101 is configured to set the imaging device 1 to the non-automatic exposure mode, and send a preparation signal to the controllable light source device 2. After the controllable light source device 2 receives the preparation signal, the master wafer 20 selects a set of control data and transmits a start signal to the imaging device 1.

The main control chip 20 controls the display device 21 to perform brightness display at a fixed time interval according to each control command in the selected set of control data, that is, the display brightness of the display device 21 is changed once every fixed time interval. .

The control storage module 102 is configured to control the image capturing apparatus 1 to capture an image when the display device 21 displays different display brightness, and read the brightness value of the captured image from the temporary memory 12, and store each brightness value into one In the standard file. The specific process is as follows:

The control storage module 102 controls the imaging apparatus 1 to take an image every other fixed time period when the display device 21 displays different brightnesses. The fixed time period should ensure that the display brightness of the display device 21 is changed once, and the image capturing apparatus 1 can take an image.

Each time the image is taken by the image capturing apparatus 1, the brightness value of the captured image is automatically stored in the temporary memory 12 of the imaging apparatus 1, and the storage module 102 is controlled to read the captured image from the temporary memory 12. The brightness value is stored and stored in a standard file. The brightness value is stored in the standard file in the form of (serial number, brightness value), as shown in FIG. The serial number refers to the serial number corresponding to the order of storage, such as the first stored luminance value, and the serial number is 1. The brightness value stored in the standard file is the brightness value in the non-automatic exposure mode, and is referred to as the brightness value before the exposure.

After the display brightness corresponding to all the control commands in the group control data is displayed, the master wafer 20 sends an end signal to the image capturing apparatus 1.

After the imaging device 1 receives the end signal, the setting module 2 103 is used to set the imaging device 1 to the automatic exposure mode.

When the setting module 2 103 sets the imaging device 1 to the automatic exposure mode, the setting module 2 103 sends a re-preparation signal to the controllable light source device 2, and after the controllable light source device 2 receives the re-preparation signal, the main control chip 20 Select the same set of control data as when the ready signal is received, and send a restart signal to the imaging apparatus 1.

The master wafer 20 controls the display device 21 to perform brightness display at a fixed time interval two, that is, the display device 21 performs brightness display at a fixed time interval two according to each control command in the selected group of control data.

The control comparison module 104 is configured to: when the display brightness of the display device 21 is displayed one by one, the image capturing device 1 captures an image corresponding to the current display brightness, and reads the brightness value of the captured image from the register 12 Comparing the brightness value with the corresponding pre-exposure brightness value in the standard file to obtain a comparative analysis result of the pre-exposure brightness value. The specific process is as follows:

The control comparison module 104 controls the imaging apparatus 1 to take an image every other fixed period of time 2 corresponding to different display brightnesses when the display device 21 displays different brightnesses. The fixed time period 2 should ensure that the display brightness of the display device 21 is changed once, and the image capturing apparatus 1 can take an image.

After the image is captured, the control comparison module 104 reads the brightness value of the captured image from the temporary memory 12, and performs the brightness value with the corresponding pre-exposure brightness value stored in the standard file. Comparative analysis to obtain a comparative analysis result. The brightness value of the captured image read by the control comparison module 104 is the brightness value in the automatic exposure mode, and is referred to as the brightness value after the exposure.

The comparative analysis result refers to an absolute value of a difference obtained by subtracting the corresponding pre-exposure brightness value from the post-exposure luminance value. Each pre-exposure brightness value corresponds to a comparative analysis result. The control comparison module 104 finds the same serial number from the standard file and extracts the pre-exposure brightness value corresponding to the serial number in the standard file. The photographing serial number refers to a serial number corresponding to the order in which the image capturing apparatus 1 captures an image in the automatic exposure mode, and if the first photographing is performed in the automatic exposure mode, the current photographing number is 1.

The result judging module 105 is configured to judge whether the comparison analysis result conforms to a predetermined rule. The predetermined rule means that the brightness value interval in which each brightness value before exposure corresponds to a range of comparative analysis results.

When the contrast analysis result corresponding to the pre-exposure luminance value is within the range of the comparison analysis result corresponding to the luminance value interval in which the pre-exposure luminance value is located, the result judging module 105 determines that the comparison analysis result conforms to the predetermined rule. When the comparison analysis result corresponding to the pre-exposure luminance value is not within the range of the comparison analysis result corresponding to the luminance value interval in which the pre-exposure luminance value is located, the result judging module 105 determines that the comparison analysis result does not conform to the predetermined rule.

The total range of brightness values of the image ranges from 0 to 255. Different brightness value intervals have different range of corresponding contrast analysis results. If the brightness value before exposure is in the high or low position in the total range of the brightness value interval, the adjustment range will be larger in the automatic exposure mode, and the corresponding contrast analysis result range is larger, and the brightness value before the exposure is in the brightness value. When the total range of the interval is in the middle position, the adjustment range in the automatic exposure mode will not be obvious, and the corresponding comparative analysis result range is relatively small. According to different test accuracy requirements, the result judging module 105 determines whether the pre-exposure brightness value is different in the high or low position in the total range of the brightness value interval. At the same time, corresponding to different test accuracy requirements, the brightness value interval and the corresponding comparative analysis result range can be adjusted accordingly. The test accuracy requirement refers to a user's requirement for the image quality obtained by the image pickup apparatus 1 .

As shown in Figure 5, it is an established rule table corresponding to a certain test accuracy. There are two columns in the established rule table, which are the brightness value interval and the comparative analysis result range. The brightness value is divided into 8 sections, and each section has a corresponding range of comparative analysis results. In the predetermined rule table, when the pre-exposure brightness value is between 0 and 31, the result judging module 105 determines that the pre-exposure brightness value is in a low position in the total range of the interval, and the brightness value before exposure is in the range of 224 to 255. During the interval, the result judging module 105 determines that the pre-exposure brightness value is in the upper position in the total range of the interval, and when the pre-exposure brightness value is between 32 and 223, the result judging module 105 determines that the pre-exposure brightness value is in the total range of the interval. In the middle position.

When the comparison analysis result meets the established rule, the brightness determination module 106 is configured to determine whether all display brightness in the group control data is displayed.

After the display brightness corresponding to all the control commands in the set of control data selected by the master wafer 20 is displayed, the master wafer 20 sends a re-end signal to the image capturing apparatus 1. When the imaging device 1 receives the re-end signal, the brightness determination module 106 determines that all display brightness in the group of control data is displayed.

When the display brightness of the group of control data is not displayed, the control comparison module 104 is further configured to control the image capturing apparatus 1 to continue to capture the next brightness image for comparative analysis until all display brightness levels in the group of control materials are displayed. Finished.

When the comparison analysis result does not conform to the predetermined rule, the stop module 107 is used to control the imaging apparatus 1 to stop shooting.

At this time, the stop module 107 sends a stop signal to the controllable light source device 2, so that the master wafer 20 stops controlling the display device 21 to perform brightness display.

When all the display brightness in the set of control data is displayed or the stop module 107 sends a stop signal to the controllable light source device 2, the display module 108 is configured to display the test result on the screen 11 of the imaging apparatus 1. The test result includes whether the comparison analysis result conforms to the established rule. When the comparison analysis result does not meet the established rule, the exposure function of the imaging apparatus 1 is problematic.

3 is a flow chart of a preferred embodiment of the exposure test method of the present invention.

In step S100, the detection module 100 detects the connectivity of the imaging device 1 and the controllable light source device 2.

In step S101, when the connectivity between the imaging apparatus 1 and the controllable light source apparatus 2 is good, the setting module 101 sets the imaging apparatus 1 to the non-automatic exposure mode.

Step S102, the master control chip 20 selects a set of control data, and controls the storage module 102 to control the image capturing apparatus 1 to shoot when the display device 21 displays different display brightnesses in the order of each control command in the selected set of control data. The image is read from the scratchpad 12 and the brightness values are stored in a standard file.

In step S103, when the display brightness corresponding to the selected group of control data is displayed in the non-automatic exposure mode, the setting module 2103 sets the imaging device 1 to the automatic exposure mode.

In step S104, the master wafer 20 still selects the same set of control data as in the non-automatic exposure mode, and the display device 21 executes the control commands one by one according to the sequence of the control commands in the group of control data to display different display brightnesses, and controls the contrast mode. The group 104 captures an image corresponding to the current display brightness control camera device 1 and reads the brightness value of the captured image from the temporary memory 12, and compares the brightness value with the corresponding brightness value in the standard file. Get a comparative analysis result. Each pre-exposure brightness value corresponds to a comparative analysis result.

The comparative analysis result refers to an absolute value of a difference obtained by subtracting the corresponding pre-exposure brightness value from the post-exposure luminance value.

In step S105, the result judging module 105 determines whether the comparison analysis result conforms to the established rule. The predetermined rule means that the brightness value interval in which each brightness value before exposure corresponds to a range of comparative analysis results. When the comparison analysis result meets the established rule, step S106 is performed; otherwise, step S107 is performed.

When the contrast analysis result corresponding to the pre-exposure luminance value is within the range of the comparison analysis result corresponding to the luminance value interval in which the pre-exposure luminance value is located, the result judging module 105 determines that the comparison analysis result conforms to the predetermined rule. When the comparison analysis result corresponding to the pre-exposure luminance value is not within the range of the comparison analysis result corresponding to the luminance value interval in which the pre-exposure luminance value is located, the result judging module 105 determines that the comparison analysis result does not conform to the predetermined rule.

In step S106, the brightness determining module 106 determines whether all display brightnesses in the group control data are displayed. When all the display brightness corresponding to the group of control data is displayed, step S108 is performed; otherwise, the process returns to step S104, and the next control command is executed in the order of the control instructions of the group of control data.

In step S107, the stop module 107 controls the imaging apparatus 1 to stop shooting.

In step S108, the display module 108 displays the test result on the screen 11 of the imaging apparatus 1.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art in light of the spirit of the present invention are It should be covered by the following patent application.

1. . . Camera equipment

10. . . Exposure test system

11. . . Screen

12. . . Register

2. . . Controllable light source device

20. . . Master chip

twenty one. . . Display device

100. . . Detection module

101. . . Set module one

102. . . Control storage module

103. . . Setting module two

104. . . Control comparison module

105. . . Result judgment module

106. . . Brightness judgment module

107. . . Stop module

108. . . Display module

S100. . . Detecting the connectivity of the camera device to the controllable light source device

S101. . . Set the camera to non-auto exposure mode

S102. . . Corresponding to different display brightness in a set of control data of the controllable light source device, controlling the camera device to take an image, reading the brightness value of the captured image, and storing each brightness value into a standard file

S103. . . Set the camera to auto exposure mode

S104. . . When the display brightness of the same group of control data in the non-automatic exposure mode is displayed one by one, an image is captured corresponding to the current display brightness control camera device, and the brightness value of the captured image is read, and the brightness value is compared with the standard file. Corresponding brightness value for comparative analysis

S105. . . Does the comparative analysis meet the established rules?

S106. . . All display brightness of the controllable light source device is displayed?

S107. . . Control the camera to stop shooting

S108. . . Display test results on the screen of the camera

1 is a block diagram of a preferred embodiment of an exposure test system of the present invention.

2 is a functional block diagram of a preferred embodiment of the exposure test system of the present invention.

3 is a flow chart of a preferred embodiment of the exposure test method of the present invention.

FIG. 4 is a storage manner of brightness values of an image captured by an image pickup apparatus in a non-automatic exposure mode according to the present invention.

Figure 5 is an illustration of an established rule table of the present invention.

S100. . . Detecting the connectivity of the camera device to the controllable light source device

S101. . . Set the camera to non-auto exposure mode

S102. . . Corresponding to different display brightness in a set of control data of the controllable light source device, controlling the camera device to take an image, reading the brightness value of the captured image, and storing each brightness value into a standard file

S103. . . Set the camera to auto exposure mode

S104. . . When the display brightness of the same group of control data in the non-automatic exposure mode is displayed one by one, an image is captured corresponding to the current display brightness control camera device, and the brightness value of the captured image is read, and the brightness value is compared with the standard file. Corresponding brightness value for comparative analysis

S105. . . Does the comparative analysis meet the established rules?

S106. . . All display brightness of the controllable light source device is displayed?

S107. . . Control the camera to stop shooting

S108. . . Display test results on the screen of the camera

Claims (10)

An exposure test method, wherein the method comprises the following steps:
Setting step 1: when the connectivity between the camera device and the controllable light source device is good, setting the camera device to a non-automatic exposure mode;
Control storage step: when displaying corresponding display brightness in a group of control materials of the controllable light source device, controlling the image capturing device to perform shooting, and reading the pre-exposure brightness value of the captured image, and storing the pre-exposure brightness values to In a standard file;
Step 2: When the display brightness corresponding to the group of control data selected in the non-automatic exposure mode is displayed, set the camera device to the automatic exposure mode;
Control comparison step: when different display brightness in the same group control data of the controllable light source device in the above non-automatic exposure mode is displayed one by one, the current display brightness control camera device takes an image and reads the captured image a brightness value after exposure, comparing the brightness value after the exposure with a corresponding pre-exposure brightness value in the standard file to obtain a comparative analysis result of the brightness value before the exposure;
a result judging step: judging whether the comparison analysis result conforms to the predetermined rule, and when the comparison analysis result meets the established rule, performing a brightness determination step; otherwise, performing a stop step;
Brightness judging step: judging whether all display brightness in the group control data is displayed, when all the display brightness in the group control data is displayed, performing the display step; otherwise, returning to the control comparison step to continue shooting the next image for comparison analysis;
Stopping step: controlling the camera device to stop shooting;
Display step: Display the test results on the screen of the camera device. The exposure test method according to claim 1, wherein after the image capturing apparatus captures an image, the brightness value of the captured image is automatically stored in a temporary register of the image capturing apparatus. The exposure test method of claim 1, wherein the controllable light source device comprises a main control chip and a display device, and the main control chip controls the display device according to the order of display brightness in the selected control data. Perform different brightness displays. The exposure test method of claim 1, wherein the comparison analysis result refers to an absolute value of a difference obtained by subtracting the corresponding pre-exposure brightness value from the post-exposure brightness value. The exposure test method of claim 1, wherein the result judging step comprises:
When the contrast analysis result corresponding to the brightness value before the exposure is within the range of the comparative analysis result corresponding to the brightness value interval in which the brightness value before the exposure is performed, it is determined that the comparison analysis result conforms to a predetermined rule, and the predetermined rule refers to the brightness before each exposure. The range of brightness values in which the values are located corresponds to the range of comparative analysis results;
When the comparison analysis result corresponding to the brightness value before the exposure is not within the range of the comparison analysis result corresponding to the brightness value interval in which the brightness value before the exposure is performed, it is determined that the comparison analysis result does not conform to the established rule. An exposure test system, wherein the system comprises:
Setting a module 1 for setting the imaging device to a non-automatic exposure mode when the connectivity between the imaging device and the controllable light source device is good;
The control storage module is configured to control the imaging device to perform shooting when the display brightness is displayed corresponding to different display brightness of the control data device of the controllable light source device, and read the pre-exposure brightness value of the captured image, and compare the brightness before each exposure. The value is stored in a standard file;
Setting module 2, when the display brightness corresponding to the group of control data selected in the non-automatic exposure mode is displayed, setting the imaging device to the automatic exposure mode;
The control comparison module is configured to: when the display brightness is different from the display brightness of the same group of control materials in the non-automatic exposure mode, the image is controlled by the current display brightness control camera device, and the image is captured. a brightness value of the image after exposure, comparing the brightness value after the exposure with a corresponding pre-exposure brightness value in the standard file to obtain a comparative analysis result of the brightness value before the exposure;
a result judging module, configured to determine whether the comparison analysis result meets a predetermined rule;
Stopping the module, configured to control the camera device to stop shooting when the comparison analysis result does not meet the predetermined rule;
The control comparison module is further configured to: when the comparison analysis result meets the predetermined rule and all display brightnesses in the group of control data are not displayed, control the imaging device to continue to take the next image for comparative analysis until the All display brightness in the group control data is displayed;
The display module is configured to display the test result on the screen of the imaging device when all display brightness in the group of control materials is displayed or after the imaging device stops shooting. The exposure test system of claim 6, wherein after the image capturing device captures an image, the brightness value of the captured image is automatically stored in a temporary memory of the image capturing device. The exposure test system of claim 6, wherein the controllable light source device comprises a main control chip and a display device, and the main control chip controls the display device according to the order of display brightness in the selected control data. Perform different brightness displays. The exposure test system of claim 6, wherein the comparison analysis result refers to an absolute value of a difference obtained by subtracting the corresponding pre-exposure brightness value from the post-exposure brightness value. The exposure test system of claim 6, wherein the result judgment module determines whether the comparison analysis result meets the established rule by the following steps:
When the contrast analysis result corresponding to the brightness value before the exposure is within the range of the comparative analysis result corresponding to the brightness value interval in which the brightness value before the exposure is performed, it is determined that the comparison analysis result conforms to a predetermined rule, and the predetermined rule refers to the brightness before each exposure. The range of brightness values in which the values are located corresponds to the range of comparative analysis results;
When the comparison analysis result corresponding to the brightness value before the exposure is not within the range of the comparison analysis result corresponding to the brightness value interval in which the brightness value before the exposure is performed, it is determined that the comparison analysis result does not conform to the established rule.