Method for self adaptation of CMOS (Complementary Metal Oxide Semiconductor) image sensor to external ray environment

Abstract

The invention relates to a method for self adaptation of a CMOS (Complementary Metal Oxide Semiconductor) image sensor to an external ray environment, which comprises the steps of: 1, initializing a CMOS by a main controller and setting a preset exposure parameter during initialization; 2, collecting a frame of empty original image and computing average gray; 3, judging whether the average gray level is within a reasonable range, if so, skipping to a step 4; 4, regulating a CMOS exposure parameter according to a result and returning to the step 2 if the average gray level is not within the reasonable range; 5, waiting for a command for collecting an image and entering a step 6 after receiving the command; 6, collecting a frame of image by the CMOS by using the current parameter; 7, analyzing and judging the image by collected the CMOS, and returning to the step 6 if the image is not qualified; and 8, processing the qualified image to finish equipment work. The method has the advantages of easiness in use, accuracy, real-time performance and stability, the easiness of the method in use lies in that the self adaptation of equipment to the external environment does not need manual control, and the accuracy of the method ensures that the equipment performance related to the image aspect can be kept in an optimal state..

Description

technical field [0001] The invention relates to the application field of CMOS image sensors, in particular to a method for the CMOS image sensor to automatically adapt to the external light environment. Background technique [0002] In the application of CMOS in the prior art, based on the preset exposure value and gain value, the image is collected after the device receives the image command, and the collected image is judged, and then the specific operation or follow-up is performed on the image according to the judgment result. use. Such as figure 1 As shown, the specific steps are as follows: [0003] Step 1: Power on the system, the main controller initializes the CMOS, and sets the preset parameters; [0004] Step 2: Wait for the command to capture images, and go to step 3 after receiving the command; [0005] Step 3: CMOS uses preset parameters to capture a frame of image; [0006] Step 4: The main controller analyzes and judges the image collected by the CMOS, a...

AI Technical Summary

Problems solved by technology

[0022] The present invention aims to solve the problems that CMOS sensors cannot automatically adjust parameters under different external light environments, resulting in that the quality of collected images does not meet the requirements, that the CMOS sensors have poor adaptability after changing the application environment, and that the consistency of CMOS sensors is not strong. A method for CMOS image sensor to automatically adapt to external light environment

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