CN112230491A - Application method of technical camera capable of automatically focusing - Google Patents
Application method of technical camera capable of automatically focusing Download PDFInfo
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- CN112230491A CN112230491A CN202011194772.5A CN202011194772A CN112230491A CN 112230491 A CN112230491 A CN 112230491A CN 202011194772 A CN202011194772 A CN 202011194772A CN 112230491 A CN112230491 A CN 112230491A
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- technical
- camera
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/08—Trick photography
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/28—Systems for automatic generation of focusing signals
- G02B7/36—Systems for automatic generation of focusing signals using image sharpness techniques, e.g. image processing techniques for generating autofocus signals
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B41/00—Special techniques not covered by groups G03B31/00 - G03B39/00; Apparatus therefor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Optics & Photonics (AREA)
- Automatic Focus Adjustment (AREA)
- Studio Devices (AREA)
Abstract
The invention relates to the technical field of technical cameras, in particular to an application method of a technical camera capable of automatically focusing, which comprises the following steps: (1) setting relevant parameters in the controller; (2) the controller controls the technical camera to move, and the graphic image acquisition device positioned on the rear frame works in the moving process; (3) the computing unit cuts the picture and records the position Si of the corresponding picture; (4) calculating and evaluating the pair of the definition and the contrast of the cut picture by utilizing an evaluation algorithm program to obtain an evaluation value Hi; (5) calculating extreme values Hmax and corresponding positions Smax of Si and Hi; (6) the controller controls the lens or the image acquisition device of the technical camera to move to the position Smax so as to finish automatic focusing. The automatic focusing method is designed aiming at the technical camera, meets the actual working requirement of the technical camera, has high automation degree in the whole process, and can quickly realize the automatic focusing of the technical camera.
Description
Technical Field
The invention relates to the technical field of technical cameras, in particular to an application method of a technical camera capable of automatically focusing.
Background
The technical camera mainly comprises a front frame, a rear frame, a guide rail, a leather chamber and other parts, wherein the front frame is provided with a lens, the rear frame is provided with a film, and the front frame and the rear frame are connected by the leather chamber. The most important function of the technical camera is the shift, wherein the shift comprises displacement and rotation, and the displacement is divided into lifting and translation; rotation includes pitch and roll. The image position can be moved through shaft shifting, the relation of the affected area can be adjusted, the parallel line convergence deformation of the image is corrected, the depth of field is regulated and controlled, the definition is assigned and distributed, and the perspective deformation is corrected. Technical camera commercial photography has been irreplaceable based on the above advantages, and certainly not only in commercial photography, some astronomical enthusiasts choose to use technical cameras in order to take the most elegant astronomical landscape.
The camera in the prior art is manually operated when the shaft moving function is realized, the front frame and the rear frame are slowly adjusted to slide back and forth on the track, the leather cavity stretches and retracts to adjust the distance, the front frame and the rear frame are simultaneously pitched and swung to adjust the vertical and horizontal angles of the front frame and the rear frame, and the operation process is complicated. Sometimes a lot of time is spent on panning in order to take one picture.
Application number CN202020431181.4 discloses an automatic technical camera, which improves the structure of the prior art camera, and adjusts the distance by arranging related components such as motors to drive the front and rear frames to slide, and adjusts the vertical and horizontal angles by arranging components such as motors to drive the front and rear frames to pitch and swing. The motor is used for replacing manual operation, and the adjusting efficiency of the technical camera can be improved. It is known that focusing is required to take pictures with different effects in the process of taking a picture, and the focusing can adjust the reality and the virtues of the picture to make the picture clear. In this document, although there is a disclosure that the operation of the motor is controlled by a computer program, the tilt of the camera can be automatically and rapidly achieved, but there is no disclosure of a method for achieving auto-focusing. In the field of technical cameras, no reports are seen on achieving the autofocus of technical cameras either. Therefore, the inventor proposes an application method of the technical camera capable of automatically focusing.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide an application method of a technical camera capable of automatic focusing, so as to achieve automatic focusing of the technical camera and further improve adjustment efficiency of the technical camera.
In order to achieve the purpose, the invention provides the following technical scheme:
an application method of a technical camera capable of automatically focusing comprises the following steps:
(1) setting a focusing range in the controller, and selecting a focusing area;
(2) the controller controls the technical camera to move, and the graphic image acquisition device positioned on the rear frame works in the moving process;
(3) a computing unit connected with the controller acquires pictures from the graphic image acquisition device, cuts the pictures according to a set focusing area, and acquires and records the position Si of the corresponding pictures from the controller;
(4) calculating and evaluating the definition and/or contrast ratio of the cut picture by utilizing an evaluation algorithm program to obtain a picture definition and/or contrast ratio evaluation value Hi;
(5) calculating extreme values Hmax and corresponding positions Smax of Si and Hi;
(6) and the controller acquires a position Smax corresponding to the extreme value Hmax and controls a lens of the technical camera or the image acquisition device to move to the position to finish automatic focusing.
Preferably, the image capturing device in step (2) is a digital camera, a digital video camera or a digital back.
Preferably, in the step (3), when the image acquisition device takes a picture, the calculation unit directly acquires the picture; when the image acquisition device records a video or reads an electronic view video stream, frame extraction is needed to obtain a picture.
Compared with the prior art, the invention has the following beneficial effects:
the automatic focusing method is designed for a technical camera, accords with the actual working requirement of the technical camera, sets relevant parameters in a controller, and controls the technical camera to move, wherein a graphic image acquisition device on a rear frame works in the moving process; the computing unit cuts the picture according to the focusing area and records the position Si corresponding to the picture; and finally, the controller controls the lens of the image acquisition device to move to the position to finish the automatic focusing work, the automation degree of the whole process is high, and the automatic focusing of the technical camera can be quickly realized.
Drawings
FIG. 1 is a flow chart of the present invention;
Detailed Description
The technical solutions of the present invention are described in detail below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An application method of a technical camera capable of automatically focusing comprises the following steps:
(1) setting a focusing range in the controller, and selecting a focusing area; the lens moving speed V and the sampling step length Delta S can also be set simultaneously;
(2) the controller controls the technical camera to move, and the graphic image acquisition device positioned on the rear frame works in the moving process;
(3) a computing unit connected with the controller acquires a picture from the graphic image acquisition device, cuts the picture according to a set focusing area, and acquires and records a position Si of the corresponding picture from the controller; in the step, when the image acquisition device shoots a picture, the calculation unit directly acquires the picture; when the image acquisition device records a video or reads an electronic view video stream, the calculation unit needs to extract frames to acquire pictures.
(4) Calculating and evaluating the definition and/or contrast ratio of the cut picture by utilizing an evaluation algorithm program to obtain a picture definition and/or contrast ratio evaluation value Hi;
(5) calculating extreme values Hmax and corresponding positions Smax of Si and Hi; in the step, a least square method is adopted to perform curve fitting on Si and Hi, and then an extreme value Hmax and a corresponding position Smax are obtained;
(6) and the controller acquires a position Smax corresponding to the extreme value Hmax and controls a lens of the technical camera or the image acquisition device to move to the position to finish automatic focusing.
In this embodiment, the image capturing device in step (2) is a digital camera, a digital video camera, or a digital back.
When in operation, a user firstly sets a focusing range, a lens moving speed V and a sampling step length delta S in the controller, selects a focusing area, sets related parameters, then the controller controls the technical camera to move in the set focusing range, and the graphic image acquisition device on the rear frame works in the moving process. The calculation unit obtains the picture from the image acquisition device, and simultaneously cuts the picture according to the set focusing area and records the position Si corresponding to the picture. And finally, the controller controls a lens of the technical camera or a graphic image acquisition device to move to the position, and automatic focusing is finished.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (3)
1. An application method of a technical camera capable of automatically focusing is characterized by comprising the following steps:
(1) setting a focusing range in the controller, and selecting a focusing area;
(2) the controller controls the technical camera to move, and the graphic image acquisition device positioned on the rear frame works in the moving process;
(3) a computing unit connected with the controller acquires pictures from the graphic image acquisition device, cuts the pictures according to a set focusing area, and acquires and records the position Si of the corresponding pictures from the controller;
(4) calculating and evaluating the definition and/or contrast ratio of the cut picture by utilizing an evaluation algorithm program to obtain a picture definition and/or contrast ratio evaluation value Hi;
(5) calculating extreme values Hmax and corresponding positions Smax of Si and Hi;
(6) and the controller acquires a position Smax corresponding to the extreme value Hmax and controls a lens of the technical camera or the image acquisition device to move to the position to finish automatic focusing.
2. The method of claim 1, wherein the image capturing device in step (2) is a digital camera, a digital video camera or a digital back.
3. The method for applying an auto-focusing camera according to claim 1, wherein in the step (3), when the image capturing device captures a picture, the computing unit directly obtains the picture; when the image acquisition device records a video or reads an electronic view video stream, frame extraction is needed to obtain a picture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011194772.5A CN112230491A (en) | 2020-10-30 | 2020-10-30 | Application method of technical camera capable of automatically focusing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011194772.5A CN112230491A (en) | 2020-10-30 | 2020-10-30 | Application method of technical camera capable of automatically focusing |
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| CN112230491A true CN112230491A (en) | 2021-01-15 |
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| CN202011194772.5A Pending CN112230491A (en) | 2020-10-30 | 2020-10-30 | Application method of technical camera capable of automatically focusing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176274A (en) * | 2021-03-19 | 2021-07-27 | 哈工大机器人(中山)无人装备与人工智能研究院 | Automatic focusing method, device and system for detecting defects of display panel |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613031A (en) * | 2001-12-07 | 2005-05-04 | 斯玛特伦斯公司 | Hylen steven H. L. Ruda Mitch |
| CN1908803A (en) * | 2006-08-10 | 2007-02-07 | 张云 | Monorail swing and tilt big range changeable camera |
| CN1916750A (en) * | 2006-08-24 | 2007-02-21 | 宁波大学 | Automatic focusing method of digital imaging based on Contourilct transform |
| CN101582985A (en) * | 2008-12-09 | 2009-11-18 | 王玉龙 | Digital scene-touching technique camera |
| CN201812119U (en) * | 2010-08-23 | 2011-04-27 | 王日升 | Focusing device of large format camera |
| CN103169491A (en) * | 2011-12-23 | 2013-06-26 | 上海力保科技有限公司 | X-ray digital image detector |
| CN105227831A (en) * | 2015-09-06 | 2016-01-06 | Tcl集团股份有限公司 | A kind of method and system of self adaptation zoom |
| CN105592258A (en) * | 2014-10-22 | 2016-05-18 | 杭州海康威视数字技术股份有限公司 | Automatic focusing method and apparatus |
| CN105938243A (en) * | 2016-06-29 | 2016-09-14 | 华南理工大学 | Multi-magnification microscope fast focusing method applied to TFT-LCD detection |
| CN106303242A (en) * | 2016-08-18 | 2017-01-04 | 上海交通大学 | The focusing system quickly of muti-spectrum imaging and method |
| CN107277363A (en) * | 2017-07-21 | 2017-10-20 | 深圳市泰衡诺科技有限公司上海分公司 | Image processing method, image processing apparatus and electronic equipment |
| CN109005340A (en) * | 2018-07-27 | 2018-12-14 | 武汉精测电子集团股份有限公司 | The Atomatic focusing method and device of image definition curve matching are carried out based on least square method |
| CN109862270A (en) * | 2019-02-25 | 2019-06-07 | 苏州长风航空电子有限公司 | Real-time automatic focusing method based on FPGA infrared video stream |
| CN111338051A (en) * | 2020-04-08 | 2020-06-26 | 中导光电设备股份有限公司 | Automatic focusing method and system based on TFT liquid crystal panel |
| CN211454196U (en) * | 2020-03-30 | 2020-09-08 | 广西代达科技有限公司 | Automatic technical camera |
-
2020
- 2020-10-30 CN CN202011194772.5A patent/CN112230491A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613031A (en) * | 2001-12-07 | 2005-05-04 | 斯玛特伦斯公司 | Hylen steven H. L. Ruda Mitch |
| CN1908803A (en) * | 2006-08-10 | 2007-02-07 | 张云 | Monorail swing and tilt big range changeable camera |
| CN1916750A (en) * | 2006-08-24 | 2007-02-21 | 宁波大学 | Automatic focusing method of digital imaging based on Contourilct transform |
| CN101582985A (en) * | 2008-12-09 | 2009-11-18 | 王玉龙 | Digital scene-touching technique camera |
| CN201812119U (en) * | 2010-08-23 | 2011-04-27 | 王日升 | Focusing device of large format camera |
| CN103169491A (en) * | 2011-12-23 | 2013-06-26 | 上海力保科技有限公司 | X-ray digital image detector |
| CN105592258A (en) * | 2014-10-22 | 2016-05-18 | 杭州海康威视数字技术股份有限公司 | Automatic focusing method and apparatus |
| CN105227831A (en) * | 2015-09-06 | 2016-01-06 | Tcl集团股份有限公司 | A kind of method and system of self adaptation zoom |
| CN105938243A (en) * | 2016-06-29 | 2016-09-14 | 华南理工大学 | Multi-magnification microscope fast focusing method applied to TFT-LCD detection |
| CN106303242A (en) * | 2016-08-18 | 2017-01-04 | 上海交通大学 | The focusing system quickly of muti-spectrum imaging and method |
| CN107277363A (en) * | 2017-07-21 | 2017-10-20 | 深圳市泰衡诺科技有限公司上海分公司 | Image processing method, image processing apparatus and electronic equipment |
| CN109005340A (en) * | 2018-07-27 | 2018-12-14 | 武汉精测电子集团股份有限公司 | The Atomatic focusing method and device of image definition curve matching are carried out based on least square method |
| CN109862270A (en) * | 2019-02-25 | 2019-06-07 | 苏州长风航空电子有限公司 | Real-time automatic focusing method based on FPGA infrared video stream |
| CN211454196U (en) * | 2020-03-30 | 2020-09-08 | 广西代达科技有限公司 | Automatic technical camera |
| CN111338051A (en) * | 2020-04-08 | 2020-06-26 | 中导光电设备股份有限公司 | Automatic focusing method and system based on TFT liquid crystal panel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113176274A (en) * | 2021-03-19 | 2021-07-27 | 哈工大机器人(中山)无人装备与人工智能研究院 | Automatic focusing method, device and system for detecting defects of display panel |
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