CN101102412A - Image shooting method of display device - Google Patents
Image shooting method of display device Download PDFInfo
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- CN101102412A CN101102412A CNA2007100293708A CN200710029370A CN101102412A CN 101102412 A CN101102412 A CN 101102412A CN A2007100293708 A CNA2007100293708 A CN A2007100293708A CN 200710029370 A CN200710029370 A CN 200710029370A CN 101102412 A CN101102412 A CN 101102412A
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Abstract
The method comprises: according to the refreshing frequency of the display, setting the exposure time of the camera as N times of the refreshing cycle of the display, N>1; making sync shooting or non-sync shooting to the images on the display. The display is a display with a given refreshing frequency, such as a CRT display, a project display, a frame scan LCD display, a PDC display. For shooting the motion pictures on the CRT display, project display, frame scan LCD display and PDP display, the shooting is the sync shooting; for shooting still image, the shooting is non sync shooting.
Description
Technical field
The present invention relates to the technique for taking of display device image, specifically be meant the image pickup method of display device image.
Background technology
Recently, along with improvement of computer science, various capture apparatus and display device have obtained extensive use.When the random shooting display device screen, such as the televising image photograph, when shutter opening, the scanning point on the television screen can not just in time drop on the starting point of image scanning, details in a play not acted out on stage, but told through dialogues or complete black phenomenon will occur; If the time for exposure of the refreshing frequency of display device and capture apparatus is inconsistent, the phenomenon of screen flicker or striped or brightness irregularities will occur, even the photo of taking is with actual seen inconsistent.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of image pickup method of display device image is provided, its shooting effect is good, do not glimmer, no striped, brightness are even.
Purpose of the present invention is achieved through the following technical solutions: the image pickup method of this display device image, be meant refreshing frequency according to display device, the time for exposure that capture apparatus is set is the refresh cycle of display device or N times of refresh cycle, N is the integer greater than 1, takes synchronously or asynchronous shooting the image of display device is corresponding.
For realizing the present invention better, when described display device is the display device of known refreshing frequency, it comprises CRT display device, projection-type display device and based on LCD, the PDP display device of field, frame scan several times, to the CRT display device, several times the projection-type display device image and when taking based on the dynamic image of the LCD of field, frame scan, PDP display device, described shooting is to take synchronously, when taking based on the rest image of the LCD of field, frame scan, PDP display device, described shooting is asynchronous shooting.
Described projection display apparatus several times is DLP, its projection cycle is the refresh cycle, the N that sets the time for exposure when taking synchronously and be projection cycle or projection cycle doubly, N is the integer greater than 1, and capture apparatus is caught the initial moment of first red light signal of each frame projection as the time for exposure.
When described display device is the display device of unknown refreshing frequency, it comprises CRT display device, projection-type display device and based on LCD, the PDP display device of field, frame scan, when taking to the image of CRT display device, projection-type display device and based on the dynamic image of field, frame scan display device, described shooting is to take synchronously, when taking based on the rest image of the LCD of field, frame scan, PDP display device, described shooting is asynchronous shooting.
The acquisition methods of the refreshing frequency of the display device of described unknown refreshing frequency is: directly detect the field sync signal or the frame synchronizing signal of display device vision signal, obtain the refreshing frequency of display device; Perhaps the field signal with the display device vision signal converts light signal to by level signal, detects the cycle of this light signal again, thereby obtains the refreshing frequency of this display device.
Also can adopt following method to obtain the refreshing frequency of the display device of described unknown refreshing frequency: the light intensity signal that directly detects display device by described capture apparatus, judge the period of change of bright field and details in a play not acted out on stage, but told through dialogues with this, thereby obtain the refreshing frequency of display device.
In order to eliminate the influence of shutter time lag (be the shutter opening transient process, begin to be opened to the time of whole unlatchings from shutter), when described capture apparatus is taken synchronously, before arriving, field sync signal open the capture apparatus shutter in advance.
When capture apparatus is taken synchronously to CRT display device image, when the back field blanking signal ended of a frame scan image or before closing to an end, close shutter again, to eliminate the sunset glow influence of picture tube fluorescent material.
The present invention compared with prior art has following advantage and beneficial effect: shooting effect is good, the screen flicker of display device can not occur in the photo that takes or the phenomenon of striped, brightness irregularities is arranged.
Description of drawings
Fig. 1 is the present invention carries out method of synchronization shooting and automatic exposure control signal according to detected field sync signal a sequential chart;
To be the present invention carry out asynchronous mode according to detected field sync signal to Fig. 2 takes sequential chart with the automatic exposure control signal;
Fig. 3 is when adopting the present invention to take unknown refresh rate display device, the fundamental diagram that field sync signal is detected.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment one
Adopt the image pickup method of this display device image, when taking, the time for exposure that capture apparatus is set is the refresh cycle of TV, thereby TV is taken synchronously to the TV (CRT display device) of known refreshing frequency.
Television image forms by spot scan, if any 25 frame/seconds of Phase Alternation Line system and 30 frame/seconds of TSC-system etc., adopting and setting the time for exposure when taking synchronously is the refresh cycle of PAL or NTSC, as shown in Figure 1, shutter begins to open, device is caught first field sync signal after this, enter the synchronous shooting state of a frame television image, close shutter after having taken a frame television image, when arriving, the field sync signal of next frame image opens again, consider that shutter opening transient process (beginning to be opened to the time of whole unlatchings from shutter) is the time lag of shutter, before field sync signal arrives, open shutter in advance; Consider the sunset glow problem of picture tube fluorescent material, when the back field blanking signal ended of a frame scan image or before closing to an end, close shutter again.
Embodiment two
Adopt the image pickup method of this display device image, the display device of projection-type several times to known refreshing frequency when taking, is synchronous shooting as DLP (Digital Light Processor).The displaying principle of DLP is: projecting camera light bulb emits beam, and the light source of white is focused on minute colour wheel by condenser, divides colour wheel to be made up of the red, green, blue filtering system, and it is with the frequency rotation of 60Hz, and in this structure, DLP is operated in the sequential color pattern.So capture apparatus only need be caught the initial moment of first red light signal of each frame projection as exposure, the time for exposure is projection cycle or projection cycle N a times, and N is the integer greater than 1.
Embodiment three
As shown in Figure 1, adopt the image pickup method of this display device image, for based on the field, the LCD of frame scan, when the dynamic image of PDP display device is taken, the time for exposure that capture apparatus is set is the refresh cycle of TV, be synchronous shooting, as shown in Figure 1, shutter begins to open, device is caught first field sync signal after this, enter the synchronous shooting state of a two field picture, close shutter after having taken a two field picture, when the field sync signal of next frame image arrives, open again, consider that shutter opening transient process (beginning to be opened to the time of whole unlatchings from shutter) is the time lag of shutter, before field sync signal arrives, open shutter in advance.
Embodiment four
As shown in Figure 2, adopt the image pickup method of this display device image, when taking based on the rest image of the LCD of field, frame scan, PDP display device, be asynchronous shooting, need not the capture field synchronizing signal, N times based on refresh cycle of the display device of field, frame scan set the time for exposure and be by the electronic shutter of control capture apparatus during shooting, and N is the integer greater than 1.
Embodiment five
Adopt the image pickup method of this display device image, display device to unknown refreshing frequency, when taking as the image of CRT display device, projection-type display device and based on the dynamic image of the LCD of field, frame scan, PDR display device, adopt synchronous image pickup method, setting the time for exposure during shooting is the detected display device refresh cycle, comprise CRT display device, projection-type display device and, obtain refreshing frequency and can adopt diverse ways according to above-mentioned all kinds of display devices based on the LCD of field, frame scan, the displaying principle difference of PDP display device:
(1) directly detects the cycle information of the field sync signal or the frame synchronizing signal of vision signal, obtain the refreshing frequency of display device;
(2) as shown in Figure 3, available wireless or wired mode are transmitted cycle information, can on the video signal cable of above-mentioned display device input, install an adapter additional, convert the level signal of field signal to light signal, detect the cycle of this light signal again with receiver, thereby obtain the refreshing frequency of this display device;
(3) can adopt capture apparatus such as camera or video tape recorder directly to detect the light intensity signal of display device, judge the period of change of bright field and details in a play not acted out on stage, but told through dialogues, thereby obtain the refreshing frequency of display device with this.
Setting the time for exposure during shooting is the detected display device refresh cycle, electronic shutter begins to open, device is caught first field sync signal after this, enter the synchronous shooting state of a frame display image, close electronic shutter after having taken a frame display image, when arriving, the field sync signal of next frame display image opens again, consider that shutter opening transient process (beginning to be opened to the time of whole unlatchings from shutter) is the time lag of shutter, before field sync signal arrives, open shutter in advance;
For the CRT display device, consider the sunset glow problem of picture tube fluorescent material, when the back field blanking signal ended of a frame scan image or before closing to an end, close shutter again.
Embodiment six
Adopt the image pickup method of this display device image, display device to unknown refreshing frequency, when taking as the image of CRT display device, projection-type display device and based on the still image of field, frame scan display device, adopt asynchronous image pickup method, the method of obtaining refreshing frequency is identical with embodiment five, the electronic shutter of control capture apparatus during shooting, the setting time for exposure is that the N of detected display device refresh cycle doubly takes, N is the integer greater than 1.
As mentioned above, just can realize the present invention preferably, the foregoing description is preferred embodiment of the present invention only, is not to be used for limiting practical range of the present invention; Be that all equalizations of doing according to content of the present invention change and modification, all contained by claim of the present invention scope required for protection.
Claims (8)
1, the image pickup method of display device image, it is characterized in that: according to the refreshing frequency of display device, the time for exposure that capture apparatus is set is the refresh cycle of display device or N times of refresh cycle, N is the integer greater than 1, takes synchronously or asynchronous shooting the image of display device is corresponding.
2, image pickup method according to the described display device image of claim 1, it is characterized in that: described display device is the display device of known refreshing frequency, comprise the CRT display device, projection-type display device and based on the field several times, the LCD of frame scan, the PDP display device, to the CRT display device, the image of projection-type display device and based on the field several times, the LCD of frame scan, when the dynamic image of PDP display device is taken, described shooting is to take synchronously, for based on the field, the LCD of frame scan, when the rest image of PDP display device was taken, described shooting was asynchronous shooting.
3, according to the image pickup method of the described display device image of claim 2, it is characterized in that: described projection display apparatus several times is DLP, its projection cycle is the refresh cycle, the N that sets the time for exposure when taking synchronously and be projection cycle or projection cycle doubly, N is the integer greater than 1, and capture apparatus is caught the initial moment of first red light signal of each frame projection as the time for exposure.
4, image pickup method according to the described display device image of claim 1, it is characterized in that: described display device is the display device of unknown refreshing frequency, comprise the CRT display device, projection-type display device and based on the field, the LCD of frame scan, the PDP display device, to the CRT display device, the image of projection-type display device and based on the field, the LCD of frame scan display device, when the PDP dynamic image is taken, described shooting is to take synchronously, for based on the field, the LCD of frame scan, when the rest image of PDP display device was taken, described shooting was asynchronous shooting.
5, according to the image pickup method of the described display device image of claim 4, it is characterized in that: the acquisition methods of the refreshing frequency of the display device of described unknown refreshing frequency is: directly detect the field sync signal or the frame synchronizing signal of display device vision signal, obtain the refreshing frequency of display device; Perhaps the field signal with the display device vision signal converts light signal to by level signal, detects the cycle of this light signal again, thereby obtains the refreshing frequency of this display device.
6, according to the image pickup method of the described display device image of claim 4, it is characterized in that: the acquisition methods of the refreshing frequency of the display device of described unknown refreshing frequency is: the light intensity signal that directly detects display device by described capture apparatus, judge the period of change of bright field and details in a play not acted out on stage, but told through dialogues with this, thereby obtain the refreshing frequency of display device.
7, according to the image pickup method of each described display device image of claim 1 to 6, it is characterized in that: when described capture apparatus is taken synchronously, before field sync signal arrives, open the capture apparatus shutter in advance, to eliminate the influence of shutter time lag.
8, according to the image pickup method of claim 2 or 4 described display device images, it is characterized in that: capture apparatus is to the CRT display device, when the back field blanking signal ended of a frame scan image or before closing to an end, close shutter again, to eliminate the sunset glow influence of picture tube fluorescent material.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100293708A CN100571340C (en) | 2007-07-25 | 2007-07-25 | The image pickup method of display device image |
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| CNB2007100293708A CN100571340C (en) | 2007-07-25 | 2007-07-25 | The image pickup method of display device image |
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| CN101102412A true CN101102412A (en) | 2008-01-09 |
| CN100571340C CN100571340C (en) | 2009-12-16 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102546925A (en) * | 2010-12-29 | 2012-07-04 | Lg电子株式会社 | Mobile terminal and controlling method thereof |
| CN104601900A (en) * | 2015-01-16 | 2015-05-06 | 杭州戈虎达科技有限公司 | Image data acquisition method for intelligent interactive micro-projection device |
| CN107197158A (en) * | 2017-06-29 | 2017-09-22 | 深圳鼎智通讯股份有限公司 | A kind of camera shoots display filter damascene method |
| CN107395980A (en) * | 2017-08-17 | 2017-11-24 | 深圳市金立通信设备有限公司 | A kind of photographic method, terminal and computer-readable recording medium |
| CN107509040A (en) * | 2017-09-15 | 2017-12-22 | 维沃移动通信有限公司 | A kind of photographic method and mobile terminal |
| CN108154060A (en) * | 2018-01-08 | 2018-06-12 | 深圳盈达信息科技有限公司 | A kind of probe aims at light exposure solution system |
| CN110933315A (en) * | 2019-12-10 | 2020-03-27 | Oppo广东移动通信有限公司 | Image data processing method and related equipment |
| CN112565620A (en) * | 2020-11-26 | 2021-03-26 | 京东方科技集团股份有限公司 | Optical compensation method and device for display screen, storage medium and electronic equipment |
| CN112674746A (en) * | 2020-12-18 | 2021-04-20 | 深圳市汇顶科技股份有限公司 | Heart rate detection device and method and electronic equipment |
Families Citing this family (1)
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| CN103475887A (en) * | 2013-07-12 | 2013-12-25 | 黑龙江科技大学 | Image synchronization method and device in camera visual system |
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2007
- 2007-07-25 CN CNB2007100293708A patent/CN100571340C/en not_active Expired - Fee Related
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102546925A (en) * | 2010-12-29 | 2012-07-04 | Lg电子株式会社 | Mobile terminal and controlling method thereof |
| CN102546925B (en) * | 2010-12-29 | 2015-04-01 | Lg电子株式会社 | Mobile terminal and controlling method thereof |
| US9124785B2 (en) | 2010-12-29 | 2015-09-01 | Lg Electronics Inc. | Method for receiving low-resolution and high-resolution images and device therefor |
| CN104601900A (en) * | 2015-01-16 | 2015-05-06 | 杭州戈虎达科技有限公司 | Image data acquisition method for intelligent interactive micro-projection device |
| CN104601900B (en) * | 2015-01-16 | 2017-11-21 | 杭州戈虎达科技有限公司 | For the micro- image data acquiring method for throwing equipment of intelligent interaction |
| CN107197158A (en) * | 2017-06-29 | 2017-09-22 | 深圳鼎智通讯股份有限公司 | A kind of camera shoots display filter damascene method |
| CN107395980A (en) * | 2017-08-17 | 2017-11-24 | 深圳市金立通信设备有限公司 | A kind of photographic method, terminal and computer-readable recording medium |
| CN107509040A (en) * | 2017-09-15 | 2017-12-22 | 维沃移动通信有限公司 | A kind of photographic method and mobile terminal |
| CN108154060A (en) * | 2018-01-08 | 2018-06-12 | 深圳盈达信息科技有限公司 | A kind of probe aims at light exposure solution system |
| CN108154060B (en) * | 2018-01-08 | 2021-10-08 | 深圳盈达信息科技有限公司 | Scanning head aiming light exposure solving system |
| CN110933315A (en) * | 2019-12-10 | 2020-03-27 | Oppo广东移动通信有限公司 | Image data processing method and related equipment |
| CN112565620A (en) * | 2020-11-26 | 2021-03-26 | 京东方科技集团股份有限公司 | Optical compensation method and device for display screen, storage medium and electronic equipment |
| US20220163868A1 (en) * | 2020-11-26 | 2022-05-26 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Optical compensation method for display screen, storage medium, and electronic device |
| US11668995B2 (en) * | 2020-11-26 | 2023-06-06 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Optical compensation method for display screen, storage medium, and electronic device |
| CN112674746A (en) * | 2020-12-18 | 2021-04-20 | 深圳市汇顶科技股份有限公司 | Heart rate detection device and method and electronic equipment |
| CN112674746B (en) * | 2020-12-18 | 2024-01-19 | 深圳市汇顶科技股份有限公司 | Heart rate detection device and method and electronic equipment |
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| CN100571340C (en) | 2009-12-16 |
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