CN1196632A - Optimization method for software of camera pickup at low light level static state - Google Patents
Optimization method for software of camera pickup at low light level static state Download PDFInfo
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- CN1196632A CN1196632A CN 98110638 CN98110638A CN1196632A CN 1196632 A CN1196632 A CN 1196632A CN 98110638 CN98110638 CN 98110638 CN 98110638 A CN98110638 A CN 98110638A CN 1196632 A CN1196632 A CN 1196632A
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Abstract
A software optimizing method for static photography of camera in condition of weak light features that the taken video images are stored in memory of computer for being optimized by software, the images are taken 4-128 times at a certain intervals (0.1-10), and all the images are added to obtain high-brightness low-noise clear image.
Description
The present invention is the optimization for program method that a kind of colour, B obtain the high definition video image.
Utilization is colored, B (C D) obtains the static video image of single frames, has been widely used in fields such as biology, medical science, security, product quality management and ad production.Also there is a fatal shortcoming in the image taking of most of CCD under low light environment, when connecting the built-in automatic gain control switch of CCD (AGC ON), though the picture brightness of picked-up can have tangible increase, but picture can produce a large amount of clutter (noise) simultaneously, and the image acquisition definition is obviously descended.Usually this image that contains serious noise can't directly be used and be write down.
The objective of the invention is to design a kind of program, the video image clarity that obtains under the video camera is significantly improved.
Adopt the computer video interface, can carry out real-time digitlization to various standard video signals and catch, can be stored among calculator memory, it is directly controlled by software program through the single frames video image after the digitlization.
Specifically be, by the computer video interface, capture a certain amount of continuous single frames original image by computer, because object is static, the object outline of being taken the photograph in each two field picture also is stable, and the much noise that is produced by auto brightness gain on the picture produces at random, at this moment as the software by certain algorithm programming just can carry out complex superposition to a plurality of successive frame pictures, cancel out each other and make the perfect purpose of clear picture thereby reach picture noise.
Program of the present invention realizes by following flow process:
(1) initiating hardware at first, purpose is: the initialization digital interface card, so that can obtain digitized image in real time.
(2) set up memory buffer 1. with the buffering 2., purpose is:
In host memory, set up two independently memory blocks, will cushion 1., will cushion 2. as front buffer as the back buffer district.
(3) can obtain by the computer video interface, capture a frame of digital video image by computer.
(4) image is deposited in buffering 1. in.
(5) all data in will cushioning 1., reduction (being about to former pixel count value X1/n) by a certain percentage
(6) data in will cushioning 1. transfer to buffering 2. in, and with the legacy data addition of buffering in 2., by step (5), (6) constitute a mean filter.
(7) whether finished the number of times that requires, general continuous capturing gets final product for 4-128 time, if "Yes" is then finished image taking one time, continues to carry out if "No" is then got back to (3), until the number of times of setting.After finishing image taking, final view data is stored in buffering (2).
Utilization the present invention program, and when starting the automatic gain function of video camera (being CCD), every 0.1-10 catches a two field picture second, and continuous capturing 8-24 time carries out superposition to each two field picture, can obtain the picture rich in detail that quality has clear improvement.
Be integrated in the image processing function library during software program application of the present invention,, mainly bear the task of obtaining image by video interface as one of them module.
The software integrated image is handled function library Module Design method: entered the mouth by the image function storehouse, enter initiating hardware respectively, create image buffer, discharge image buffer, use program of the present invention when obtaining the single frames video image, obtain the TWAIN image, again through image filter, final image shows, preserves, and enters other module as required.
The present invention can pass through establishment PC microcomputer or Single Chip Microcomputer (SCM) program realizes, and applicable to various colours or black and white video standard.
The present invention can be applicable to the imaging moiety in the biological electrophoresis analytical system.The nucleic acid electrophoresis gel that is placed in the camera bellows is taken by CCD by this system, by computer it is carried out analyzing and processing.The present invention starts the automatic gain function of CCD, handles through program optimization, makes the faint gel fluoroscopic image through ultraviolet excitation reach high brightness, low noise clear picture, and Fig. 1, Fig. 2 can contrast effect of the present invention.
In following test system environment, obtain Fig. 1, Fig. 2:
CCD model: SONY CCD-TR503E
Video system standard: PAL
Video digitizer interface: Matrox Meteor
Main frame: Pertium133/32M RAM
Host service function: Ms windows95
Fig. 1 is high brightness, the strong noise image that common mode obtains.
Fig. 2 is with the high brightness that obtains after the program optimization of the present invention, low noise image.
Fig. 3 is a flow chart of the present invention.
Claims (3)
1, a kind of optimization method for software of camera pickup at low light level static state is characterized in that low light level photography image is handled through following software optimization:
(1) initiating hardware;
(2) set up memory buffer 1. with buffering 2., and empty;
(3) obtain a frame of digital video image;
(4) deposit image in buffering 1.;
(5) all pixel datas in will cushioning 1. reduce (X1/n) in proportion
(6) data in will cushioning 1. transfer to buffering 2. in, and with the legacy data addition of buffering in 2.;
Whether (7) finish n time, "Yes", "No" is then got back to (3) if then finishing image taking one time.
2, camera pickup at low light level static state optimization method for software according to claim 1 is characterized in that catching with above-mentioned program control video image, and every 0.1-10 catches a two field picture second, carries out 4-128 time continuously
3, the optimization method for software of camera pickup at low light level static state according to claim 1 is characterized in that software is integrated in the module of image processing function library when using.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110638 CN1196632A (en) | 1998-01-22 | 1998-01-22 | Optimization method for software of camera pickup at low light level static state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110638 CN1196632A (en) | 1998-01-22 | 1998-01-22 | Optimization method for software of camera pickup at low light level static state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1196632A true CN1196632A (en) | 1998-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98110638 Pending CN1196632A (en) | 1998-01-22 | 1998-01-22 | Optimization method for software of camera pickup at low light level static state |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1196632A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414412C (en) * | 2003-12-12 | 2008-08-27 | 东芝松下显示技术有限公司 | Liquid crystal display device |
| CN103002223A (en) * | 2011-09-08 | 2013-03-27 | 奥林巴斯映像株式会社 | Photographic equipment |
| CN104363375A (en) * | 2014-11-28 | 2015-02-18 | 广东欧珀移动通信有限公司 | Method, device and terminal for photograph noise reduction |
-
1998
- 1998-01-22 CN CN 98110638 patent/CN1196632A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414412C (en) * | 2003-12-12 | 2008-08-27 | 东芝松下显示技术有限公司 | Liquid crystal display device |
| CN103002223A (en) * | 2011-09-08 | 2013-03-27 | 奥林巴斯映像株式会社 | Photographic equipment |
| CN104363375A (en) * | 2014-11-28 | 2015-02-18 | 广东欧珀移动通信有限公司 | Method, device and terminal for photograph noise reduction |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |