Method and device for improving bayer image contrast

Abstract

The present invention provides a method and device for improving the contrast of a Bayer image, which includes: respectively acquiring the dark primary color image data at the bottom, middle and top of the pixel unit in the current Bayer image data; managing the acquired dark primary color image data in a time-sharing manner, and using the dark primary color image data at the top to The primary color image data obtains the integral value of the left top region TL and the right top region TR. The integral value of the left bottom region BL and the right bottom region BR is obtained through the dark primary color image data at the bottom, and an integral map is formed; through the integral map, the left top region After comprehensive processing, the integral values ​​of TL, right top area TR, left bottom area BL and right bottom area BR are processed by bilateral filtering to obtain filtered dark primary color image data; the filtered dark primary color image data are calculated and processed to obtain Bayer image data after contrast improvement. Through the above method, while ensuring the contrast and detailed information of the image, the intermediate processing process is simplified and the processing delay is reduced.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and a device for improving the contrast of a Bayer image. Background technique [0002] In the process of image capture and video capture, when night vision or backlight is poor, the image obtained at this time has low contrast and fuzzy details, which brings a lot of inconvenience to the subsequent image analysis work. Using image enhancement technology can effectively improve the performance of video acquisition, image recognition, dynamic recognition and other systems in low-light conditions. [0003] For color images, it is necessary to collect a variety of the most basic colors, such as RGB three colors, the easiest way is to use the filter method, the red filter through the red wavelength, the green filter through the green wavelength, A blue filter passes blue wavelengths. If you want to collect the three basic colors of RGB, you need three filters, whi...

AI Technical Summary

Problems solved by technology

Therefore, in the existing contrast enhancement methods for Bayer image data, both graphics processing and digital signal processing can meet the real-time requirements, and even the processing delay can reach several seconds.

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