CN113873153B - Shooting adjusting method of video camera - Google Patents
Shooting adjusting method of video camera Download PDFInfo
- Publication number
- CN113873153B CN113873153B CN202111113877.8A CN202111113877A CN113873153B CN 113873153 B CN113873153 B CN 113873153B CN 202111113877 A CN202111113877 A CN 202111113877A CN 113873153 B CN113873153 B CN 113873153B
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- test
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- test card
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- field
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 111
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
- H04N23/67—Focus control based on electronic image sensor signals
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/95—Computational photography systems, e.g. light-field imaging systems
- H04N23/958—Computational photography systems, e.g. light-field imaging systems for extended depth of field imaging
- H04N23/959—Computational photography systems, e.g. light-field imaging systems for extended depth of field imaging by adjusting depth of field during image capture, e.g. maximising or setting range based on scene characteristics
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computing Systems (AREA)
- Theoretical Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Automatic Focus Adjustment (AREA)
Abstract
The invention discloses a camera shooting adjusting method, which comprises a focusing distance adjusting method and a depth of field testing method; the focusing distance adjusting method comprises the following steps: s11, manufacturing a series of test cards scaled in equal proportion; s12, erecting a fixed camera; s13, placing the test card at a corresponding position, wherein the test card faces the lens and is perpendicular to the lens optical axis of the camera, and the lens optical axis of the camera passes through the center of the test card; s14, respectively placing the corresponding test cards at the front and rear numerical values of the depth of field requirement according to the depth of field requirement, focusing through a camera lens to enable the resolution values of the front and rear test cards to be the same, placing a plurality of test cards at the corresponding positions between the front and rear test cards, and finding out the test card with the largest resolution test value, wherein the distance between the corresponding position of the test card and the camera is the focusing distance. The camera shooting adjusting method can accurately determine the optimal focusing distance and depth of field test.
Description
Technical Field
The invention relates to the technical field of camera adjustment, in particular to a camera shooting adjustment method.
Background
The depth of field refers to the front-back distance range of the shot object measured by the front edge of the camera lens or other imagers capable of obtaining the clear image, namely the clear image presented in the front-back range of the focus after focusing is completed, and the front-back distance range is called the depth of field; the distance between the aperture, the lens and the object is an important factor affecting the depth of field. Depth of field is a major factor in the imaging effect of an image object. At present, when a camera is used for photographing different far and near objects, the depth of field is judged mainly by observing the blurring degree of the far and near objects by human eyes, the judgment of the depth of field is inaccurate, and the effect of depth of field change cannot be quantified. Most of the field depth testing devices on the market are matched, and the universality is poor. In addition, when a camera is used for photographing, the optimal focusing distance cannot be accurately determined.
Disclosure of Invention
The invention aims to provide a camera shooting adjusting method which can accurately determine the optimal focusing distance and accurately test the depth of a scene.
In order to achieve the above purpose, the invention provides a camera shooting adjusting method, which comprises a focusing distance adjusting method and a depth of field testing method; the focusing distance adjusting method comprises the following steps:
s11, manufacturing a series of test cards scaled in equal proportion;
s12, erecting a fixed camera and measuring the distance;
s13, placing the test card at a corresponding position, wherein the test card faces the lens and is perpendicular to the lens optical axis of the camera, and the lens optical axis of the camera passes through the center of the test card;
s14, respectively placing the corresponding test cards at the front and rear numerical values of the depth of field requirement according to the depth of field requirement, focusing through a camera lens to enable the resolution values of the front and rear test cards to be the same, placing a plurality of test cards at the corresponding positions between the front and rear test cards, and finding out the test card with the largest resolution test value, wherein the distance between the corresponding position of the test card and the camera is the focusing distance.
Preferably, the depth of field testing method comprises the following steps:
s21, manufacturing a series of test cards scaled in equal proportion;
S22, erecting a fixed camera and measuring the distance;
S23, placing the test card at a corresponding position, wherein the test card faces the lens and is perpendicular to the lens optical axis of the camera, and the lens optical axis of the camera passes through the center of the test card;
S24, placing the corresponding test card at the position to be tested, adjusting the image of the test card at the position to be tested clearly through focusing of the camera lens, placing the corresponding test card at the front and rear positions of the depth of field requirement, testing the resolution of the test card at the front and rear positions of the depth of field, and observing whether the resolution at the front and rear positions of the depth of field meets the requirement.
Preferably, the test card is a resolution test card.
The camera shooting adjusting method has the advantages and positive effects that:
The invention adopts the series of test cards with equal scaling to quantify the shooting definition, can obtain the accurate optimal focusing distance, and can accurately test the scene depth distance. The camera shooting adjustment method provided by the invention has good compatibility and can be generally used in various cameras.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
Fig. 1 is a schematic diagram of an embodiment of a method for adjusting shooting of a camera according to the present invention.
Detailed Description
The technical scheme of the invention is further described below through the attached drawings and the embodiments.
Examples
Fig. 1 is a schematic diagram of an embodiment of a method for adjusting shooting of a camera according to the present invention. As shown in the figure, the camera shooting adjustment method comprises a focusing distance adjustment method and a depth of field test method. The focusing distance adjusting method comprises the following steps:
S11, manufacturing a series of test cards scaled in equal proportion, wherein the test cards are resolution test cards. For example, the length and width of the test card with 1 unit distance are set to be 1 standard length respectively, and then calculated according to the principle of similar triangle, the length and width of the test card with n unit distances are set to be n standard lengths respectively.
S12, erecting a fixed camera and measuring the distance. The camera is fixed on the bracket and the corresponding distance, such as the front and rear distance required by the depth of field, is measured according to the requirement.
S13, placing the test card at a corresponding position, wherein the test card faces the lens and is perpendicular to the lens optical axis of the camera, and the lens optical axis of the camera passes through the center of the test card.
S14, respectively placing the corresponding test cards at the front and rear numerical values of the depth of field requirement according to the depth of field requirement, focusing through a camera lens to enable the resolution values of the front and rear test cards to be the same, placing a plurality of test cards at the corresponding positions between the front and rear test cards, and finding out the test card with the largest resolution test value, wherein the distance between the corresponding position of the test card and the camera is the focusing distance.
For example, the depth of field requires 1 meter to 6 meters, 1 meter is the front distance, 6 meters is the rear distance, the test cards corresponding to 1 meter and 6 meters are respectively placed at the positions of 1 meter and 6 meters, and the camera lens is adjusted so that the resolution values of the test cards at the positions of 1 meter and 6 meters are the same; then a plurality of test cards are placed between the positions of 1 meter and 6 meters, the test value of the resolution of one test card is the largest, and the distance between the position corresponding to the test card with the largest resolution test value and the camera is the focusing distance.
The depth of field testing method comprises the following steps:
s21, manufacturing a series of test cards scaled in equal proportion, wherein the test cards are resolution test cards. For example, the length and width of the test card with 1 unit distance are set to be 1 standard length respectively, and then calculated according to the principle of similar triangle, the length and width of the test card with n unit distances are set to be n standard lengths respectively.
S22, erecting a fixed camera and measuring the distance. The camera is fixed on the bracket and the corresponding distance, such as the front and rear distance required by the depth of field, is measured according to the requirement.
S23, placing the test card at a corresponding position, wherein the test card faces the lens and is perpendicular to the lens optical axis of the camera, and the lens optical axis of the camera passes through the center of the test card.
The first three steps of the depth of field test method are the same as the first three steps of the focusing distance adjustment method.
S24, placing the corresponding test card at the position to be tested, adjusting the image of the test card at the position to be tested clearly through focusing of the camera lens, placing the corresponding test card at the front and rear positions of the depth of field requirement, testing the resolution of the test card at the front and rear positions of the depth of field, and observing whether the resolution at the front and rear positions of the depth of field meets the requirement.
For example, the camera is to test a depth of field at 5 meters, providing a depth of field of 3 meters to 9 meters. Placing the test card at the position of 5 meters into the position of 5 meters, adjusting and clearing the image of the test card at the position of 5 meters through focusing of a camera lens, setting the clear degree according to the requirement, and assuming that the horizontal definition is 1000TVL; then placing the test card at the positions of 3 meters and 9 meters, and observing whether the resolution of the test card at the positions of 3 meters and 9 meters meets the set requirements; for example, if the resolution of the test card at the position before and after the depth of field is greater than or equal to 70% of the resolution of the focusing distance, the resolution of the test card at the positions of 3 meters and 9 meters is greater than or equal to 700TVL, the depth of field requirement is met, otherwise the depth of field requirement is not met. The resolution of the test card at the front and rear positions of the depth of field can be adjusted through the camera lens, so that the resolution of the test card at the front and rear positions of the depth of field meets the requirements.
Therefore, the camera shooting adjusting method can accurately determine the optimal focusing distance and accurately test the depth of view; has the advantage of good universality.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (1)
1. A camera shooting adjusting method is characterized in that: the method comprises a focusing distance adjusting method and a depth of field testing method; the focusing distance adjusting method comprises the following steps:
s11, manufacturing a series of test cards scaled in equal proportion;
s12, erecting a fixed camera and measuring the distance;
s13, placing the test card at a corresponding position, wherein the test card faces the lens and is perpendicular to the lens optical axis of the camera, and the lens optical axis of the camera passes through the center of the test card;
S14, respectively placing the corresponding test cards at the front and rear numerical values of the depth of field requirement according to the depth of field requirement, focusing through a camera lens to enable the resolution values of the front and rear test cards to be the same, placing a plurality of test cards at the corresponding positions between the front and rear test cards, and finding out the test card with the largest resolution test value, wherein the distance between the corresponding position of the test card and the camera is the focusing distance;
The depth of field testing method comprises the following steps:
s21, manufacturing a series of test cards scaled in equal proportion;
S22, erecting a fixed camera and measuring the distance;
S23, placing the test card at a corresponding position, wherein the test card faces the lens and is perpendicular to the lens optical axis of the camera, and the lens optical axis of the camera passes through the center of the test card;
s24, placing the corresponding test card at a position to be tested, adjusting the image of the test card at the position to be tested clearly through focusing of a camera lens, placing the corresponding test card at the front and rear positions of the depth of field requirement, testing the resolution of the test card at the front and rear positions of the depth of field, and observing whether the resolution at the front and rear positions of the depth of field meets the requirement;
The test card is a resolution test card.
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| CN202111113877.8A CN113873153B (en) | 2021-09-23 | 2021-09-23 | Shooting adjusting method of video camera |
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| CN202111113877.8A CN113873153B (en) | 2021-09-23 | 2021-09-23 | Shooting adjusting method of video camera |
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| CN113873153A CN113873153A (en) | 2021-12-31 |
| CN113873153B true CN113873153B (en) | 2024-06-21 |
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| CN116760974B (en) * | 2023-08-22 | 2024-02-23 | 深圳市灿锐科技有限公司 | Method for automatically evaluating lens definition and depth effect |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991841A (en) * | 2017-11-10 | 2018-05-04 | 苏州灵猴机器人有限公司 | Depth of field automatic testing equipment |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990039780A (en) * | 1997-11-14 | 1999-06-05 | 전주범 | How to adjust auto focus of digital camera |
| JP2003255217A (en) * | 2002-03-01 | 2003-09-10 | Mitsubishi Electric Corp | Focusing method and focusing device |
| US7071966B2 (en) * | 2003-06-13 | 2006-07-04 | Benq Corporation | Method of aligning lens and sensor of camera |
| JP4203380B2 (en) * | 2003-08-29 | 2008-12-24 | 富士フイルム株式会社 | Portable device with camera function and imaging method thereof |
| CN100584044C (en) * | 2004-08-27 | 2010-01-20 | 鸿富锦精密工业（深圳）有限公司 | Digital image resolution test chart producing method |
| JP2007249000A (en) * | 2006-03-17 | 2007-09-27 | Casio Comput Co Ltd | Imaging apparatus, imaging method, and imaging program |
| JP4420909B2 (en) * | 2006-06-02 | 2010-02-24 | 富士フイルム株式会社 | Imaging device |
| CN103336404B (en) * | 2013-06-29 | 2016-08-10 | 歌尔声学股份有限公司 | A kind of lens test device and method |
| CN205721067U (en) * | 2016-03-30 | 2016-11-23 | 广东光阵光电科技有限公司 | A kind of depth of field test device |
| CN206948474U (en) * | 2017-07-05 | 2018-01-30 | 深圳市捷高电子科技有限公司 | A kind of quick focusing mechanism |
| CN208509157U (en) * | 2018-05-17 | 2019-02-15 | 昆山丘钛微电子科技有限公司 | Camera depth of field test device |
| CN109060850B (en) * | 2018-07-20 | 2021-01-29 | 中国科学院电工研究所 | Resolution test card for detecting Nano CT imaging quality and preparation method thereof |
| CN109348129B (en) * | 2018-11-13 | 2020-11-03 | 信利光电股份有限公司 | Definition detection method and system for fixed-focus camera |
| CN110519588B (en) * | 2019-09-05 | 2021-03-19 | 普联技术有限公司 | Image definition detection method and device for focusing and camera device |
| CN111726605B (en) * | 2020-06-03 | 2021-10-22 | 上海摩勤智能技术有限公司 | Resolving power determining method and device, terminal equipment and storage medium |
| CN111901585A (en) * | 2020-07-23 | 2020-11-06 | 上海龙旗科技股份有限公司 | Method and device for detecting focusing time of camera and computer readable storage medium |
| CN214154699U (en) * | 2020-11-24 | 2021-09-07 | 广州视源电子科技股份有限公司 | Interactive flat plate analytic force testing device |
-
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107991841A (en) * | 2017-11-10 | 2018-05-04 | 苏州灵猴机器人有限公司 | Depth of field automatic testing equipment |
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