CN113873153A - Camera shooting adjusting method - Google Patents
Camera shooting adjusting method Download PDFInfo
- Publication number
- CN113873153A CN113873153A CN202111113877.8A CN202111113877A CN113873153A CN 113873153 A CN113873153 A CN 113873153A CN 202111113877 A CN202111113877 A CN 202111113877A CN 113873153 A CN113873153 A CN 113873153A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000012360 testing method Methods 0.000 claims abstract description 107
- 230000003287 optical effect Effects 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 238000010998 test method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
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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
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 with equal scaling; s12, erecting and fixing a camera; s13, placing the test card at a corresponding position, wherein the test card faces the lens and is vertical to the lens optical axis of the camera, and the lens optical axis of the camera passes through the center of the test card; and S14, respectively placing the corresponding test cards at the front and rear numerical positions of the depth of field requirement according to the depth of field requirement, focusing through a camera lens to enable the resolution numerical values of the front and rear test cards to be the same, placing a plurality of test cards at corresponding positions between the front and rear test cards, and finding out the test card with the maximum 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 the optimal 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 range of distance between the front and the back of a shot object, which is measured by imaging that a clear image can be obtained at the front edge of a camera lens or other imagers, i.e. the clear image is presented in the range between the front and the back of a focus after focusing is completed, and the range of distance between the front and the back 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. The depth of field is a main factor of the shooting effect of the image object. At present, when a camera is used for photographing different far and near objects, the depth of field is mainly judged by observing the fuzzy degree of the far and near objects through human eyes, the judgment of the depth of field is inaccurate, and the effect of depth of field change cannot be quantized. Most of 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 field.
In order to achieve the aim, 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 with equal scaling;
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 vertical to the lens optical axis of the camera, and the lens optical axis of the camera passes through the center of the test card;
and S14, respectively placing the corresponding test cards at the front and rear numerical positions of the depth of field requirement according to the depth of field requirement, focusing through a camera lens to enable the resolution numerical values of the front and rear test cards to be the same, placing a plurality of test cards at corresponding positions between the front and rear test cards, and finding out the test card with the maximum 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 test method includes the following steps:
s21, manufacturing a series of test cards with equal scaling;
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 vertical 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 a camera lens, placing the corresponding test card at the front and rear positions required by the depth of field, 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 requirements.
Preferably, the test card is a resolution test card.
The camera shooting adjusting method has the advantages and positive effects that:
the invention adopts series of test cards with equal scaling to quantify the shooting definition, can obtain the accurate optimal focusing distance and accurately test the depth of field distance. The camera shooting adjusting method provided by the invention has good compatibility and can be universally used in various cameras.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic diagram illustrating a camera shooting adjustment method according to an embodiment of the present invention.
Detailed Description
The technical solution of the present invention is further illustrated by the accompanying drawings and examples.
Examples
Fig. 1 is a schematic diagram illustrating a camera shooting adjustment method according to an embodiment of the present invention. As shown in the figure, a camera shooting adjustment method includes a focusing distance adjustment method and a depth of field test method. The focusing distance adjusting method comprises the following steps:
and S11, manufacturing a series of test cards with equal scaling, wherein the test cards are resolution test cards. For example, the length and width of the test card at 1 unit distance are respectively set to be 1 standard length, and then the length and width of the test card corresponding to n unit distances are respectively n standard lengths according to the calculation based on the similar triangle principle.
And S12, erecting a fixed camera and measuring the distance. The camera is fixed on the bracket, and corresponding distances, such as the front distance and the back distance required by the depth of field, are measured according to requirements.
And S13, placing the test card at a corresponding position, wherein the test card faces the lens and is vertical to the optical axis of the lens of the camera, and the optical axis of the lens of the camera passes through the center of the test card.
And S14, respectively placing the corresponding test cards at the front and rear numerical positions of the depth of field requirement according to the depth of field requirement, focusing through a camera lens to enable the resolution numerical values of the front and rear test cards to be the same, placing a plurality of test cards at corresponding positions between the front and rear test cards, and finding out the test card with the maximum 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 distance of the front, 6 meters is the distance of the back, the test cards corresponding to 1 meter and 6 meters are respectively placed at the positions of 1 meter and 6 meters, and the lens of the camera is adjusted to ensure 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 maximum, and the distance between the position corresponding to the test card with the maximum resolution and the camera is the focusing distance.
The depth of field test method comprises the following steps:
and S21, manufacturing a series of test cards with equal scaling, wherein the test cards are resolution test cards. For example, the length and width of the test card at 1 unit distance are respectively set to be 1 standard length, and then the length and width of the test card corresponding to n unit distances are respectively n standard lengths according to the calculation based on the similar triangle principle.
And S22, erecting a fixed camera and measuring the distance. The camera is fixed on the bracket, and corresponding distances, such as the front distance and the back distance required by the depth of field, are measured according to requirements.
And S23, placing the test card at a corresponding position, wherein the test card faces the lens and is vertical to the optical axis of the lens of the camera, and the optical axis of the lens 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 focus 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 a camera lens, placing the corresponding test card at the front and rear positions required by the depth of field, 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 requirements.
For example, a camera is required to test a depth of field of 5 meters, with a depth of field of 3 meters to 9 meters being specified. Placing the test card at 5 meters into a position of 5 meters, and adjusting the image of the test card at 5 meters to be clear through focusing of a camera lens, wherein the clear degree is set as required, and the horizontal definition is assumed to be 1000 TVL; 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 requirement or not; for example, if the resolution of the test card at the position before and after the depth of field is set to be greater than or equal to the resolution of the focusing distance of 70%, the resolution of the test card at the position 3 m and 9 m 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 ratios of the test cards at the positions before and after the depth of field can be adjusted through the camera lens, so that the resolution ratios of the test cards at the positions before and after the depth of field meet the requirements.
Therefore, the camera shooting adjusting method can accurately determine the optimal focusing distance and accurately test the depth of field; has the advantage of good universality.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the invention without departing from the spirit and scope of the invention.
Claims (3)
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 with equal scaling;
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 vertical to the lens optical axis of the camera, and the lens optical axis of the camera passes through the center of the test card;
and S14, respectively placing the corresponding test cards at the front and rear numerical positions of the depth of field requirement according to the depth of field requirement, focusing through a camera lens to enable the resolution numerical values of the front and rear test cards to be the same, placing a plurality of test cards at corresponding positions between the front and rear test cards, and finding out the test card with the maximum resolution test value, wherein the distance between the corresponding position of the test card and the camera is the focusing distance.
2. The camera shooting adjustment method according to claim 1, characterized in that: the depth of field test method comprises the following steps:
s21, manufacturing a series of test cards with equal scaling;
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 vertical 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 a camera lens, placing the corresponding test card at the front and rear positions required by the depth of field, 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 requirements.
3. A camera shooting adjustment method according to claim 1 or 2, characterized in that: the test card is a resolution test card.
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| CN202111113877.8A CN113873153A (en) | 2021-09-23 | 2021-09-23 | Camera shooting adjusting method |
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| CN202111113877.8A CN113873153A (en) | 2021-09-23 | 2021-09-23 | Camera shooting adjusting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116760974A (en) * | 2023-08-22 | 2023-09-15 | 深圳市灿锐科技有限公司 | Method for automatically evaluating lens definition and depth effect |
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