CN100490540C

CN100490540C - Method for synthesizing color dynamic image from monochrome CCD/CMOS system

Info

Publication number: CN100490540C
Application number: CNB2004100514586A
Authority: CN
Inventors: 杨泽声
Original assignee: Maike Aodi Industry Group Co Ltd
Current assignee: Maike Aodi Industry Group Co Ltd
Priority date: 2004-09-09
Filing date: 2004-09-09
Publication date: 2009-05-20
Anticipated expiration: 2024-09-09
Also published as: WO2006026902A1; CN1747555A

Abstract

A method for synthesizing dynamic color image in monochromatic CCD/CMOS system includes such steps as sequentially turning on red, green and blue light sources to ensure that only one light source is turned on while sequentially taking three images and using a synthesis algorithm to combine them into a dynamic color image.

Description

The method of the synthetic colored dynamic image of monochromatic CCD/CMOS system

Technical field

The present invention relates to a kind of method that obtains high definition, high-speed dynamic color image, referred in particular to the method for the synthetic colored dynamic image of a kind of monochromatic CCD/CMOS system.

Background technology

Traditionally, in order to obtain the image that resolution is higher, color is abundanter, high-grade camera system generally adopts the 3-CCD system, and 3 CCD respond to R ruddiness, G green glow, B blue light respectively, capture three frame images simultaneously, then with the synthetic frame chromatic image of three frame images.This scheme can obtain good effect, but system complex costs an arm and a leg.

Summary of the invention

The invention provides the method for the synthetic colored dynamic image of a kind of monochromatic CCD/CMOS system, obtaining the same image quality and the display speed of similar 3-CCD system, and make system simplification, price reduces.

The present invention is realized by following technical scheme:

The method of the synthetic colored dynamic image of monochromatic CCD/CMOS system, allow three light sources light successively earlier, arbitrary time only has a light source to open, when light source igniting, carry out image-capture, three light sources are lighted once successively, obtain three frame images, be respectively the image under R ruddiness, G green glow, the illumination of B blue light source; By composition algorithm,, promptly obtain colored dynamic image again with the synthetic frame chromatic image of three frame images.

Concrete steps are as follows:

Step 1, red light is bright, take pictures, and obtains a frame image, and red light extinguishes, and forwards step 2 to;

Step 2, green light is bright, take pictures, and obtains a frame image, and green light extinguishes, and forwards step 3 to;

Step 3, the basket lamp is bright, take pictures, and obtains a frame image, and the basket lamp extinguishes, and returns step 1;

Simultaneously, pass through composition algorithm. with the synthetic frame chromatic image of three frame images. promptly obtain colored dynamic image.

Like this, the present invention only uses a monochromatic camera system (CCD/CMOS), under R ruddiness, G green glow, B blue light three primary colors illuminator, real-time dynamicly with three frame achromatic map combined color images. speed is fully identical with the CCD/CMOS self speed. obtain the same image quality and the display speed of similar 3-CCD system.

Description of drawings

Fig. 1 is an image synthesizing method schematic diagram of the present invention:

Fig. 2 is a general flowchart;

Fig. 3 is a flow process of the present invention;

Fig. 4 is the quick image synthesizing method schematic diagram under the computer control;

Fig. 5 is the example schematic that the present invention is applied to digital biomicroscope;

Fig. 6 is the light path principle schematic diagram that the present invention is applied to digital biomicroscope;

Fig. 7 is that control circuit for light source of the present invention is implemented schematic diagram;

Fig. 8 is CCD/CMOS digital vedio recording system of the present invention and light-source system annexation schematic diagram.

Embodiment

Common synthetic method is continuous repeating step one to three as shown in Figure 2, and three frame monochrome images are obtained in R, G, circulation of B, synthetic one; And then wait for R, G, circulation of B, synthetic second.Twice synthetic time is the time of a RGB circulation.Suppose that CCD was 30 frame/seconds the most at a high speed, every interframe was divided into 0.33 second.In this way synthetic, synthetic maximum speed is 30/3=10 frame/second, and the interframe of synthetic back image is divided into 0.33 * 3=0.99 second.

The present invention adopts new method shown in Fig. 1 and 3-7, and aggregate velocity depends on the speed with CCD fully, if the speed of CCD can reach for 30 frame/seconds, then the speed of composite image also was 30 frame/seconds.At first R, G, B illumination are lighted successively, obtain three frame monochrome images, synthetic the 1st frame chromatic image; Need not wait circulation of RGB afterwards again, when the R illumination is lighted, obtain the R frame image, and synthetic with preceding G frame image that once obtains and B frame image, synthetic the 2nd frame image; G illumination is subsequently lighted, and obtains the G frame image, merges synthetic the 2nd frame image with the last B frame and R frame image.Promptly all be that three the last monochrome frame images synthesize at every turn, needn't wait until after RGB three frames gather together enough just to begin to synthesize.Suppose that CCD was 30 frame/seconds the most at a high speed, every interframe was divided into 0.33 second.Synthetic with method of the present invention, the every interframe of composite image is divided into 0.33 second (identical with CCD self operating rate), 30 frame/seconds of aggregate velocity.

In order to capture correct image, must guarantee camera system and light-source control system work coordination.When camera system is caught image, guarantee the light source igniting that light, other light sources is closed, otherwise light source is not opened may occur catching image the time, maybe needs to catch the image under the R light source, and that light but is G.CCD/CMOS also needs certain time for exposure, and the time of light source igniting is answered long enough, guarantees that CCD/CMOS has sufficient exposure.Light source also needs certain hour from being opened to steady operation. just can begin to catch image after waiting until light stability work.Based on above consideration, the present invention has designed following scheme:

As shown in Figure 4. with the computer is master control system, computer sends order control CCD/CMOS work, after CCD/CMOS has caught a frame image, initiates a message to computer, the computer toggle lights receives pictorial data. and utilize the time waiting light source works that receives data stable.When Data Receiving was finished, light source is steady operation also, and computer can order CCD/CMOS to prepare to catch frame image down, and the beginning deal with data merges, shows that CCD/CMOS utilizes exposure during this period of time.Computer Processing is finished, and CCD/CMOS is ready to new pictorial data, can send message to computer again, repeats said process.

Above-mentioned control flow is to be master control with the computer, and actions such as the light on and off of light source, CCD/CMOS seizure are entirely by computer control.Carry out with these coordinations of program control, can effectively avoid occurring unmatched situation.For raising speed, some steps that are independent of each other have been taked parallel method simultaneously.For example, utilize the time of computer combining image to allow CCD/CMOS catch frame image down; The time of utilizing computer to receive the CCD/CMOS data waits for that light source works is stable.These measures have been played important effect to the lifting of whole system performance.

Technology of the present invention is applied to the example of digital biomicroscope, sees system block diagram as shown in Figure 5.

Digital biomicroscope adopts the plain CCD camera system of monochromatic 130 everythings, and the Lights section adopts the LED of 3 1W, each one of R, G, B.

Cooperate shown in Figure 7ly, control circuit for light source adopts Single-chip Controlling (P89c51), by RS232 serial communication protocol and computer communication.Computer can send the light on and off of three LED of commands for controlling, and can control the brightness of RGB LED respectively, by changing the ratio of three LED brightness of RGB, can produce the light source of any colour temperature.

Claims

1, the method for the synthetic colored dynamic image of monochromatic CCD/CMOS system, it is characterized in that: allow three light sources circulate successively earlier and light, arbitrary time only has a light source to open, when light source igniting, carry out image-capture, three light sources circulate successively and light once, obtain three frame monochrome images, be respectively the image under R ruddiness, G green glow, the illumination of B blue light source; Follow these steps to synthesize: step 1, red light is bright, take pictures, and obtains a frame monochrome image, and red light extinguishes, and is synthetic with the monochrome image under preceding twice G, the B illumination, generates a frame chromatic image, forwards step 2 to; Step 2, green light is bright, take pictures, and obtains a frame monochrome image, and green light extinguishes, and is synthetic with the monochrome image under preceding twice B, the R illumination, generates a frame chromatic image, forwards step 3 to; Step 3, is taken pictures at Lan Dengliang, obtains a frame monochrome image, and blue lamp extinguishes, and is synthetic with the monochrome image under preceding twice R, the G illumination, generates a frame chromatic image, returns step 1; Circular flow so always by composition algorithm, with the synthetic frame chromatic image of the three frame monochrome images of the last time, can obtain colored dynamic image in real time.