Bayer image contrast improvement method and device

Abstract

The invention provides a Bayer image contrast improvement method and device. The method comprises steps that dark primary color image data of bottom, middle and top portions of pixel units of presentBayer image data are respectively acquired; time-divisionally management of the acquired dark primary color image data is carried out, integral values of the top left region TL and the top right region TR are acquired through the top dark primary color image data, integral values of the bottom left region BL and the bottom right region BR are acquired through the bottom dark primary color image data, and an integral graph is formed; after the integral graph and the integral values of the top left region TL, the top right region TR, the bottom left region BL and the bottom right region BR are processed, bilateral filtering processing is carried out to acquire the filtered dark primary color image data; calculation processing of the filtered dark primary color image data is carried out to acquire Bayer image data after contrast improvement. The method is advantaged in that on the condition that the image contrast and the detailed information are guaranteed, the intermediate processing process is simplified, and 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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