Color Correction Device, Method, and Program

摘要

It is made possible to easily correct the color tone changing from region to region in an image without the need of preparing a color chart for each region where the color tone changes due to factors such as light source change. A color correction device comprises: moving object detection means 101 which detects a moving object in input video images; position-specific color information acquisition means 102 which judges the identity of the detected moving object in the video images, thereby acquires the position of the moving object along with its movement and information representing the color of the moving object in each image, and stores the position of the moving object along with its movement and the information representing the color of the moving object in each image in position-specific color information storage means 103 while associating them with each other; color-stable region estimation means 104 which estimates color-stable regions in the shooting area based on the information representing the relationship between the position and the color of the moving object; color correction parameter calculation means 108 which calculates color conversion parameters between color-stable regions based on the result of the estimation of the color-stable regions and information on color in each color-stable region; and color correction means 106 which corrects colors of the correction target image by using the color conversion parameters between color-stable regions.

主权项

1. A color correction device comprising:
a moving object detection unit which detects a moving object in video images whose shooting area is identical with or entirely includes the shooting area of a correction target image; a position-specific color information acquisition unit which judges the identity of the moving object detected by the moving object detection unit in the video images and thereby acquires the position of the moving object along with its movement and information representing the color of the moving object in each image; a position-specific color information storage unit which stores the position of the moving object along with its movement and the information representing the color of the moving object in each image acquired by the position-specific color information acquisition unit while associating them with each other; a color-stable region estimation unit which estimates color-stable regions, as regions in the shooting area where color is stable, based on the information representing the relationship between the position and the color of the moving object which has been stored in the position-specific color information storage unit; a color conversion parameter calculation unit which calculates color conversion parameters, as parameters for converting colors between color-stable regions, based on the result of the estimation by the color-stable region estimation unit and the information representing the relationship between the position and the color of the moving object which has been stored in the position-specific color information storage unit; and a color correction unit which corrects colors of the correction target image by using the color conversion parameters between color-stable regions calculated by the color conversion parameter calculation unit.