CN113225551B - Camera exposure time detection method based on calibration lamp - Google Patents
Camera exposure time detection method based on calibration lamp Download PDFInfo
- Publication number
- CN113225551B CN113225551B CN202110493014.1A CN202110493014A CN113225551B CN 113225551 B CN113225551 B CN 113225551B CN 202110493014 A CN202110493014 A CN 202110493014A CN 113225551 B CN113225551 B CN 113225551B
- Authority
- CN
- China
- Prior art keywords
- exposure
- time
- lamps
- lamp
- exposure time
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention relates to the technical field of camera parameter analysis, in particular to a method for detecting exposure time of a camera. The calibration lamp measurement standard provided by the invention adopts an LED as a light source, a camera to be measured is directly used for shooting the calibration lamp, the characteristic that the response time of the LED is extremely short is utilized, a program output level signal is adopted for controlling, the control delay is extremely short relative to the exposure time, the precision of a measurement element is higher, and the condition that a dynamic target shooting method depends on the running precision of a mechanical structure in the aspect of the rotating speed of a time device is avoided. The invention adopts an exposure time ambiguity detection mode to determine the approximate exposure time of the camera, thereby avoiding the situation that the reference column or reference row in the image of the current light-emitting two-dimensional array test method is not easy to analyze and extract.
Description
Technical Field
The invention relates to the technical field of camera parameter analysis, in particular to a method for detecting exposure time of a camera.
Background
The exposure time of the camera is the time during which the shutter is opened in order to project light onto the photosensitive surface of the photographic photosensitive material. For photometric devices, exposure time is an important basic factor in determining the imaging quality of each type of target. The exposure time of the actual camera has a certain deviation from the set value, and for the measurement equipment, the exposure time of the camera needs to be detected more accurately to carry out related test measurement work.
The method for measuring the exposure time of the camera in the prior art mainly comprises an auxiliary shutter method (Wang Yu, li Ping, wu Hou are equal, the research on the exposure time calibration method of the digital camera, the photosensitive science and the photochemistry, 2007,7, 25 (4): 306-310), a dynamic target shooting method (Wang Xiaoxiao, tan Shan, huang Feng, the shallow analysis of the exposure time and the test method of the digital camera, automation and information engineering 2014,35 (5): 46-48) and a light-emitting two-dimensional array test method (invention patent application No. 201510917155.6).
However, the above methods all have different defects, and the auxiliary shutter method is an indirect measurement method and is influenced by the aspects of light source stability, uniformity and the like; the auxiliary shutter method has higher requirements on the basic performance and traceability of each measuring unit in the calibration device; according to the dynamic target shooting method, uncertainty generated by image processing and uncertainty component of the rotating speed of the time device can greatly influence the measurement precision of the dynamic target shooting method, and the rotating speed of the time device depends on the running precision of a mechanical structure; and the reference column or reference row in the image of the light-emitting two-dimensional array test method is not easy to analyze and extract.
Disclosure of Invention
The invention aims to provide a camera exposure time detection method based on a calibration lamp, which solves the technical problems that the measurement precision is influenced by the basic performance of each measurement unit or images are difficult to process and analyze in the conventional exposure time detection method.
In order to achieve the above object and solve the above technical problems, the technical solution of the present invention mainly comprises three steps:
step one, calibrating lamp measurement standard setting
A row of LED lamps are arranged on the calibration device, and the LED lamps are driven by electric pulses to realize the effect of a water lamp; shooting LED water-flowing lamps by using a photoelectric theodolite, and sequentially lighting the LED lamps to ensure that at least one lamp in the water-flowing lamps is in a lighting state;
the calibration lamp consists of a plurality of rows of LED running water lamps, and the lighting time of each row of LED running water lamps is arranged in a grading manner or in the same level;
when the level setting is carried out, after the low-level water-flowing lamps run for a period, the upper-level water-flowing lamps are lighted one by one, and the like;
when the same level is set, all the drainage water lamps uniformly run and are lightened one by one, and a period is formed after all the drainage water lamps are lightened;
step two, exposure time ambiguity measurement
The exposure time ambiguity measurement means measuring the approximate exposure time, and the lighting time of each drainage water lamp of the calibration lamp is set in a grading way; the LED calibration lamps are arranged in n stages, wherein 1 lamp is arranged in each stage from 1 stage to n-1 stage, and 2*l lamps are arranged in the nth stage; the period of the 1 st stage is longest, the period is gradually reduced later, the accuracy of the lowest stage is improved as much as possible by the aid of 2*l lamps of the nth stage, n represents the number of stages, and l represents the number of columns;
meanwhile, the time ambiguity and the precision are changed by adjusting the period of each stage; the lighting time from the 1 st stage to the nth stage is respectively delta T 1 、ΔT 2 、ΔT 3 、ΔT 4 ...ΔT n N, the number of the lamps is respectively 1 、n 2 、n 3 、n 4 ...n n Then exposure blur time T Blurring Comprises the following steps:
T blurring ＝ΔT 1 ·(n 1 -1)+ΔT 2 ·(n 2 -2)+ΔT 3 ·(n 3 -3)+ΔT 4 ·(n 4 -4)+...+ΔT n ·n n
In actual operation, after the lower lamp is fully lighted, the upper lamp is lighted, and simultaneously, the exposure characteristics of the camera can expose the lighted LEDs, so that the exposure effect that 2-3 lights of a certain level are lighted and the next light is fully lighted can be generated; to calculate the exposure ambiguity time T in actual operation Fuzzy substance If the number of the lamps is 2 to 3, multiplying the lighting time of the certain level by 2, if the number of the lamps is 3, multiplying the lighting time of the certain level by 3, and adjusting the lighting time of the upper and lower levels correspondingly in the same way; after adjustment, the number of 1-n-2-level lamps is 1,n < 2 × l, the number of n-1-level lamps is 1 or 2: the exposure blur degree time T in actual operation is calculated by the following formula Fuzzy substance ：
T Fuzzy reality ＝ΔT n ·n n
Step three, exposure time measurement
The exposure time measurement adopts the same-stage setting, in the exposure time measurement, ((n + 1) × l) LED lamps of the calibration lamp are adjusted to be one stage, the ((n + 1) × l) LED lamps are sequentially lightened, the lightening time is set according to the exposure time fuzziness of the camera in the second step, and the lightening time Delta T of each LED lamp Exposure method The upward rounding setting is as follows:
then Δ T Exposure method Namely, the precision measurement of the exposure time of the camera is carried out; other exposure gears design the lighting time of the LED according to the same method, measure the number of the lighting lamps in the shot image, and multiply the lighting time to obtain the total length of the exposure time;
the lighting time in the calibration lamp is delta T Exposure method Each row of the lighting lamps has n number 1 、n 2 、n 3 、n 4 、n 5 ...n n+1 Then the exposure time of the device is:
T exposure method ＝ΔT Exposure method ·n 1 +ΔT Exposure method ·n 2 +ΔT Exposure method ·n 3 +ΔT Exposure method ·n 4 +...+ΔT Exposure method ·n n+1
If the number of unlit lamps/total number of lamps in the exposure image is more than or equal to 20%, resetting the lighting time as follows, wherein T Exposure 1 For the first calculation of T Exposure method Time of (2):
and repeating the exposure time measuring step until the measurement requirement is met.
Compared with the prior art, the invention has the following beneficial effects
1. According to the calibration lamp measuring principle provided by the invention, the LED is used as a light source, the camera to be measured is directly used for shooting the calibration lamp, and the influence of the auxiliary shutter method, namely the indirect measuring method, on the aspects of light source stability, uniformity and the like is avoided.
2. The calibration lamp measuring principle provided by the invention adopts the LED as a light source, directly shoots the calibration lamp by using a camera to be measured, utilizes the characteristic that the response time of the LED is extremely short, adopts a program to output a level signal for control, has extremely small control delay relative exposure time and higher precision of a measuring element, and avoids the condition that a dynamic target shooting method depends on the operation precision of a mechanical structure in the aspect of time device rotating speed. The invention adopts an exposure time ambiguity detection mode to determine the approximate exposure time of the camera, thereby avoiding the situation that the reference column or reference row in the image of the current light-emitting two-dimensional array test method is not easy to analyze and extract.
3. The exposure time detection mode adopted by the invention utilizes the LED of the whole calibration lamp as the primary lamp, and the mode can effectively improve the detection precision and simultaneously avoid the problems that the multi-stage lamp repeatedly flickers and the running position of the lamp is not easy to determine.
4. The method is applied to actual exposure detection work, and has high detection precision. In a specific embodiment, the detection precision is 80us, and the detection precision can be adjusted to reach 10us for a specific device to be detected.
Drawings
FIG. 1 is a schematic diagram of a basic principle of measurement of an LED calibration lamp according to an embodiment of the present invention;
fig. 2 is a schematic view of a multi-stage LED lamp water-flowing lamp device according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a five-level clock flashing method according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of measured data of a fifth-level lamp according to an embodiment of the invention;
FIG. 5 is a schematic view of an exposure time measuring flash lamp according to an embodiment of the present invention;
FIG. 6 is a diagram illustrating primary lamp measurement data according to an embodiment of the present invention;
FIG. 7 is a flowchart of a calibration lamp-based method for detecting exposure time of a camera according to the present invention.
Detailed Description
The invention adopts the LED calibration lamp controlled by a program, and determines the exposure time of the camera by using two calibration lamp operation modes of exposure time ambiguity and exposure time
The method adopts the LED lamp as a light source, sets the lighting state of the LED lamp through the calibration lamp device, and directly shoots the calibration lamp bracket by adopting the camera. The method is a direct exposure measurement method, and different modes of a lighting array of an LED lamp are utilized to analyze the exposure time of a camera. Meanwhile, the response time of the light emitting diode in the LED lamp is very short, about 10 -7 s or less, the following equationSequentially outputting a level signal for control, wherein the control delay is extremely small relative to the exposure time; therefore, the method has high-precision measurement elements.
In a specific implementation aspect, the exposure time of the camera is determined by two calibration lamp operation modes of exposure time ambiguity and exposure time. An exposure time ambiguity mode of operation to determine an approximate time of exposure of the camera; on this basis, the exposure time operation mode is used to measure the accurate camera exposure time.
The flow of the detection method of the invention is shown in figure 7. The setting program controls the electric pulse of the LED calibration lamp, and the LED calibration lamp operates two working modes corresponding to exposure time ambiguity measurement and exposure time measurement; and carrying out exposure time measurement on the basis of exposure time ambiguity measurement, and finally obtaining an exposure time measurement result.
Example 1
Step one, calibrating lamp measurement standard setting
A row of LED lamps is arranged on the calibration device, and the water lamp is driven by electric pulses to achieve the effect of the water lamp, as shown in fig. 1. The photoelectric theodolite is used for shooting LED running water lamps, at least one lamp in shot pictures is on, and the relative measurement time displayed by the calibration device can be determined according to the condition that the LED on the photoelectric theodolite picture is on (the number of lamps is on) and the time of each lamp.
The time representation precision of the calibration device can be improved by a multistage LED lamp water flowing device, as shown in FIG. 2.
Step two, exposure time ambiguity measurement
The exposure time ambiguity measurement herein refers to measuring the approximate exposure time.
The LED array is shown in fig. 3 as 5 stages, 5 lamps per stage for stages 1 to 4, and 10 lamps for stage 5. The period of each stage is shown in fig. 1, according to which the measurement time ambiguity is 2000ms and the time accuracy is 320 mus.
In addition, the time ambiguity and accuracy can be varied by adjusting the period of each stage. Taking fig. 3 as an example, the lighting periods corresponding to the 1 st to 5 th levels are Δ T respectively 1 、ΔT 2 、ΔT 3 、ΔT 4 、ΔT 5 The number of the lighted lamps is n 1 、n 2 、n 3 、n 4 、n 5 And then the calibration lamp time of the equipment is as follows:
T fuzzy substance ＝ΔT 1 ·(n 1 -1)+ΔT 2 ·(n 2 -2)+ΔT 3 ·(n 3 -3)+ΔT 4 ·(n 4 -4)+ΔT 5 ·n 5
FIG. 4 is a diagram of the five-stage lamp shooting effect of the device; the first 4 rows of the lamp groups correspond to stages 1 to 4, and the 5 and 6 rows correspond to stages 5. The experimental result shows that the exposure time ambiguity is 6.4ms when two 4 th-level lamps are on; the 5 th stage displays 8 lights, wherein 6 lights are all on, and the exposure time ambiguity is 1.92-2.56 ms; the 5 th level precision is higher than 1-4 levels, and the exposure time ambiguity is 1.92-2.56 ms.
Step three, exposure time measurement
In the exposure time measurement, 30 LED lamps in fig. 4 were adjusted to one level, and the 30 lamps were sequentially turned on as shown in fig. 5.
The lighting time is set according to the exposure time ambiguity of the camera of 1.92-2.56 ms, and the lighting time of the LED lamp can be set to 80us, so that the measurement accuracy of the exposure time of the camera can reach 80us. The other exposure stages are designed in the same manner as the lighting time of the LED. And measuring the number of the lighting in the shot image, and multiplying the lighting time by the number of the lighting in the shot image to obtain the length of the exposure time.
Taking fig. 5 as an example, the lighting time is Δ T, and the lighting quantity of each row is n 1 、n 2 、n 3 、n 4 、n 5 、n 6 Then the exposure time of the device is:
T exposure method ＝ΔT Exposure to light ·n 1 +ΔT Exposure method ·n 2 +ΔT Exposure method ·n 3 +ΔT Exposure to light ·n 4 +ΔT Exposure to light ·n 5 +ΔT Exposure method ·n 6
FIG. 6 is a diagram of the effect of the primary light shot by the device; setting the same lighting time for each row of the lamp group; the first-level lamp is mainly used for exposure time detection, and the detection precision is high because the whole lamp group is used as a basic detection unit and is not time-classified.
As shown in the following table, it can be seen that the device exposure time is 2080us (the device exposure time set value is 2000 us) under this detection accuracy condition.
Claims (1)
1. A camera exposure time detection method based on a calibration lamp is characterized by comprising the following steps:
step one, calibrating lamp measurement standard setting
A row of LED lamps are arranged on the calibration device, and the LED lamps are driven by electric pulses to realize the effect of a water lamp; shooting LED water-flowing lamps by using a photoelectric theodolite, and sequentially lighting the LED lamps to ensure that at least one lamp in the water-flowing lamps is in a lighting state;
the calibration lamp consists of a plurality of rows of LED running water lamps, and the lighting time of each running water lamp is arranged in a grading way or in the same level;
when the level setting is carried out, after the low-level water-flowing lamps operate for one period, the upper-level water-flowing lamps are lighted up one by one, and the like;
when the same level is set, all the running water lamps are lightened one by one, and a period is formed after all the running water lamps are lightened;
step two, exposure time ambiguity measurement
The exposure time ambiguity measurement means measuring the approximate exposure time, and the lighting time of each drainage water lamp of the calibration lamp is set in a grading way; the LED calibration lamps are arranged in n stages, wherein 1 lamp is arranged in each stage from 1 stage to n-1 stage, and 2*l lamps are arranged in the nth stage; the period of the 1 st stage is longest, the period is gradually reduced later, the accuracy of the lowest stage is improved as much as possible by the aid of 2*l lamps of the nth stage, wherein n represents the stage number, and l represents the number of columns;
meanwhile, the time ambiguity and the precision are changed by adjusting the period of each stage; the lighting time from the 1 st stage to the nth stage is respectively delta T 1 、ΔT 2 、ΔT 3 、ΔT 4 ...ΔT n Number of lights onAre each n 1 、n 2 、n 3 、n 4 ...n n Then exposure blur time T Blurring Comprises the following steps:
T blurring ＝ΔT 1 ·(n 1 -1)+ΔT 2 ·(n 2 -2)+ΔT 3 ·(n 3 -3)+ΔT 4 ·(n 4 -4)+...+ΔT n ·n n
In actual operation, because the lower lamp is fully lighted and then the upper lamp is lighted, and the exposure characteristics of the camera can expose the lighted LEDs, the exposure effect that 2-3 lights of a certain level are lighted and the next level is fully lighted can be generated; to calculate the exposure blur degree time T in actual operation Fuzzy substance If the number of the lamps is 2 to 3, multiplying the lighting time of the certain level by 2, if the number of the lamps is 3, multiplying the lighting time of the certain level by 3, and adjusting the lighting time of the upper and lower levels correspondingly in the same way; after adjustment, the number of 1-n-2-level lamps is 1,n < 2 × l, the number of n-1-level lamps is 1 or 2: the exposure blur degree time T in actual operation is calculated by the following formula Fuzzy substance ：
T Fuzzy substance ＝ΔT n ·n n
Step three, exposure time measurement
The exposure time measurement adopts the same-stage setting, in the exposure time measurement, the calibration lamps ((n + 1) × l) LED lamps are adjusted to be one stage, the ((n + 1) × l) lamps are sequentially lightened, the lightening time is set according to the exposure fuzzy time of the camera in the step two, and the lightening time delta T of each LED lamp is set Exposure method The upward rounding setting is as follows:
then Δ T Exposure to light Namely, the precision measurement of the exposure time of the camera is carried out; other exposure gears design the lighting time of the LED according to the same method, measure the number of the lighting lamps in the shot image, and multiply the lighting time to obtain the total length of the exposure time;
calibration lampThe time of middle lighting is delta T Exposure to light Each row of the lighting lamps has n number 1 、n 2 、n 3 、n 4 、n 5 ...n n+1 Then the exposure time of the device is:
T exposure method ＝ΔT Exposure method ·n 1 +ΔT Exposure method ·n 2 +ΔT Exposure method ·n 3 +ΔT Exposure method ·n 4 +...+ΔT Exposure method ·n n+1
If the number of unlit lamps/total number of lamps in the exposure image is more than or equal to 20%, resetting the lighting time as follows, wherein T Exposure 1 For the first calculation of T Exposure method Time of (2):
and repeating the exposure time measuring step until the measurement requirement is met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110493014.1A CN113225551B (en) | 2021-05-07 | 2021-05-07 | Camera exposure time detection method based on calibration lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110493014.1A CN113225551B (en) | 2021-05-07 | 2021-05-07 | Camera exposure time detection method based on calibration lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113225551A CN113225551A (en) | 2021-08-06 |
| CN113225551B true CN113225551B (en) | 2022-11-22 |
Family
ID=77091194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110493014.1A Active CN113225551B (en) | 2021-05-07 | 2021-05-07 | Camera exposure time detection method based on calibration lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113225551B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4941009A (en) * | 1988-07-07 | 1990-07-10 | Konica Corporation | Method for slow synchro-flash photography |
| US5758213A (en) * | 1993-01-11 | 1998-05-26 | Nikon Corporation | Camera having a shutter measuring apparatus |
| CN1813218A (en) * | 2003-06-30 | 2006-08-02 | 诺基亚有限公司 | Method and system in digital imaging for adjusting exposure and a corresponding device |
| CN103348667A (en) * | 2011-03-31 | 2013-10-09 | 富士胶片株式会社 | Image-capturing device, image-capturing method, and program |
| CN103676453A (en) * | 2012-09-11 | 2014-03-26 | 北京航天计量测试技术研究所 | Method and device for measuring shutter delay time of camera |
| WO2014057654A1 (en) * | 2012-10-12 | 2014-04-17 | セイコーエプソン株式会社 | Method, display device, and device for measuring shutter time lag; method for manufacturing camera; method for measuring camera display delay; and device for measuring display delay |
| CN105357520A (en) * | 2015-12-10 | 2016-02-24 | 北京旷视科技有限公司 | Method and device for measuring exposure time of camera |
| CN105430387A (en) * | 2015-12-16 | 2016-03-23 | 中国科学院西安光学精密机械研究所 | System and method for testing exposure time of camera/vidicon |
| JP2016058852A (en) * | 2014-09-09 | 2016-04-21 | カシオ計算機株式会社 | Imaging apparatus, imaging method and program |
| CN205490960U (en) * | 2015-12-16 | 2016-08-17 | 中国科学院西安光学精密机械研究所 | Camera / camera exposure time test system |
| JP2017004003A (en) * | 2016-08-23 | 2017-01-05 | セイコーエプソン株式会社 | Shutter time lag measurement method, shutter time lag measurement display device and manufacturing method for camera |
| CN110971892A (en) * | 2019-11-27 | 2020-04-07 | 深圳市派科斯科技有限公司 | Exposure delay measuring method, device and storage medium |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI405459B (en) * | 2009-12-31 | 2013-08-11 | Altek Corp | Automatic adjustment method of camera safe shutter |
| JP5827100B2 (en) * | 2011-10-31 | 2015-12-02 | 富士機械製造株式会社 | Image sensor inspection device |
| CN104931470B (en) * | 2015-06-02 | 2018-04-03 | 江苏大学 | A kind of pesticide residue detection device and detection method based on fluorescent high spectral technology |
| CN105721861B (en) * | 2016-01-21 | 2018-01-09 | 北京中科慧眼科技有限公司 | The detection method and detection means of digital camera |
-
2021
- 2021-05-07 CN CN202110493014.1A patent/CN113225551B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4941009A (en) * | 1988-07-07 | 1990-07-10 | Konica Corporation | Method for slow synchro-flash photography |
| US5758213A (en) * | 1993-01-11 | 1998-05-26 | Nikon Corporation | Camera having a shutter measuring apparatus |
| CN1813218A (en) * | 2003-06-30 | 2006-08-02 | 诺基亚有限公司 | Method and system in digital imaging for adjusting exposure and a corresponding device |
| CN103348667A (en) * | 2011-03-31 | 2013-10-09 | 富士胶片株式会社 | Image-capturing device, image-capturing method, and program |
| CN103676453A (en) * | 2012-09-11 | 2014-03-26 | 北京航天计量测试技术研究所 | Method and device for measuring shutter delay time of camera |
| WO2014057654A1 (en) * | 2012-10-12 | 2014-04-17 | セイコーエプソン株式会社 | Method, display device, and device for measuring shutter time lag; method for manufacturing camera; method for measuring camera display delay; and device for measuring display delay |
| JP2016058852A (en) * | 2014-09-09 | 2016-04-21 | カシオ計算機株式会社 | Imaging apparatus, imaging method and program |
| CN105357520A (en) * | 2015-12-10 | 2016-02-24 | 北京旷视科技有限公司 | Method and device for measuring exposure time of camera |
| CN105430387A (en) * | 2015-12-16 | 2016-03-23 | 中国科学院西安光学精密机械研究所 | System and method for testing exposure time of camera/vidicon |
| CN205490960U (en) * | 2015-12-16 | 2016-08-17 | 中国科学院西安光学精密机械研究所 | Camera / camera exposure time test system |
| JP2017004003A (en) * | 2016-08-23 | 2017-01-05 | セイコーエプソン株式会社 | Shutter time lag measurement method, shutter time lag measurement display device and manufacturing method for camera |
| CN110971892A (en) * | 2019-11-27 | 2020-04-07 | 深圳市派科斯科技有限公司 | Exposure delay measuring method, device and storage medium |
Non-Patent Citations (1)
| Title |
|---|
| 全帧型CCD数码相机曝光时间的精确控制;杜云飞等;《光子学报》;20090415(第04期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113225551A (en) | 2021-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110267031B (en) | Method and system for testing delay time of output image of camera | |
| CN1264132C (en) | A method and apparatus for calibrating display devices and automatically compensating for loss in their efficiency over time | |
| CN103676453A (en) | Method and device for measuring shutter delay time of camera | |
| CN106611583B (en) | Gamma voltage debugging method and device for electroluminescent display device | |
| EP1792494A2 (en) | Uniformity and brightness measurement in oled displays | |
| CN110971892B (en) | Exposure delay measuring method, device and storage medium | |
| CN104316295B (en) | The photoelectric test method and device of a kind of LED component | |
| US4225825A (en) | Precision self-adjusting slope circuit | |
| CN101206833A (en) | System and method for obtaining gamma correction data point-to-point as well as application system thereof | |
| CN105430387B (en) | A kind of camera/camcorder time for exposure test system and method | |
| EP1919191A1 (en) | On chip test mode implementation | |
| CN113225551B (en) | Camera exposure time detection method based on calibration lamp | |
| CN115580782B (en) | Light source brightness control method and system for linear array camera illumination and storage medium | |
| CN103884405B (en) | The gas meter, flow meter correction method shown based on liquid crystal display screen | |
| JP2011039449A5 (en) | ||
| CN104792498A (en) | Dynamic testing method for light source | |
| US9071744B1 (en) | Mobile device flash calibration | |
| CN114778076A (en) | Multi-camera synchronism measuring method and device based on nanosecond LED (light emitting diode) running water lamp | |
| CN113518219B (en) | Camera exposure time deviation detection method based on calibration lamp | |
| CN104796691B (en) | A kind of digital camera shutter speed detection means and detection method | |
| CN112153369A (en) | Image shooting synchronism detection method | |
| JP2016194673A (en) | Method for regulating light source of photolithography exposure system and exposure assembly for photolithography device | |
| CN117528067B (en) | Industrial camera exposure test equipment and test method | |
| CN105848338B (en) | A kind of done with high accuracy method of common light sensor | |
| CN110933397B (en) | High-precision imaging delay testing device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |