Method for calibrating colors of multiple cameras in open environment

Abstract

The invention discloses a method for calibrating colors of multiple cameras in an open environment, comprising the specific steps as follows: firstly, the white balance of a single camera is calibrated by adopting an X-Rite 24 color standard color card so as to solve the problem that physical parameters of the cameras are inconsistent with one another; secondly, data of the X-Rite 24 color standard color card of different cameras under different monitoring scenes is obtained, the position of the color card is obtained in a man-machine interaction way, the position and the color average value of each color lump in the color card are calculated to obtain 24 color values in two scenes with multiple cameras, color mapping relation among the cameras is calculated in a polynominal regression method, and each camera is subjected to color calibration; and finally, areas with similar colors in the two scenes are found according to an H-S color matching method, and color calibration parameters are adjusted in a self-adaption way by detecting the change of pixel colors in the matched areas with the similar colors through on-line detection, thereby ensuring that the multiple cameras in a monitoring system are consistent in color in the open environment.

Description

technical field [0001] The invention belongs to the technical field of video surveillance and relates to a color calibration method between multiple cameras in an open environment. Background technique [0002] In recent years, the multi-camera joint surveillance system mode has been applied more and more in the surveillance system. In the multi-camera joint surveillance without overlapping fields of view, the correct matching of the same target in different cameras at different times is the key to realize the multi-camera target. A prerequisite for proper tracking. Because the color feature has good adaptability to the discontinuity of time and space, it is the feature that is often used in the process of human moving target recognition and tracking, but the color feature is easily affected by the light source, noise, shadow, sensitivity of the optical sensor, etc., making the same target There is a big difference in the color of different cameras in the field of view. Due...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to propose a color calibration method between multi-cameras in an open environment, which overcomes that in the prior art, when matching targets based on colors, the difference between the same target due to the difference in the target environment and the cameras used causes The problem of color differences, realized the color calibration between multiple cameras of the same target in different environments

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