Camera Color Matching Using Color Chart Vector Scope Regions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing color matching techniques between multiple cameras struggle to provide intuitive visual verification of color matching accuracy, especially when capturing images from different angles, as they display color difference signals across the entire image, making it difficult to assess color shifts in the color chart region.
Innovation Solution
A color adjustment apparatus and method that generates a correction lookup table (LUT) based on captured images from reference and target cameras, and displays color difference signals in a visually intelligible manner using vector scope images, focusing only on the color chart regions to facilitate easy comparison and assessment of color matching accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If color difference signals of the entire captured image are displayed as vector scope image, then comprehensive color information is provided, but color matching accuracy of the color chart cannot be easily grasped
Solution Approach 1:
The patent divides the captured image into two distinct regions: color chart region and non-color chart region. It then generates separate vector scope images for each region, allowing users to independently analyze color matching accuracy of the color chart while preserving access to comprehensive color information from the entire image through the non-color chart region's vector scope image.
Solution Approach 2:
The patent extracts the color chart region from the entire captured image to create a dedicated vector scope image that displays only color difference signals from the color chart. This extraction allows focused visual verification of color matching accuracy without the distraction or confusion of other image regions, directly addressing the problem of difficult visual assessment.
2Area of stationary object
If images from reference camera and target camera are different in capturing field angle, then comprehensive scene coverage is achieved, but color difference in non-color chart regions increases
Solution Approach 1:
The patent segments the image analysis by creating separate processing paths for color chart region and non-color chart region. This segmentation allows the system to tolerate field angle differences in non-color chart regions while maintaining strict color matching requirements for the color chart region, effectively decoupling the impact of different capturing angles from color matching accuracy assessment.
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
PROBLEM TO BE SOLVED: To display color matching accuracy in a visually intelligible manner. SOLUTION: A color adjustment apparatus (102) includes means for obtaining a first captured image by capturing a color chart (105) including patches (301C, 302C, 303C) with a reference camera (100), means (400) for obtaining a second captured image by capturing the color chart with a target camera (101), for obtaining information for color matching, and for generating a third captured image by applying the information to the second captured image, means (401) for outputting color difference signals of the first and third captured images, and means (402) for generating a first image based on color difference signals in areas corresponding to the patches among the color difference signals of the first captured image and a second image based on color difference signals in the areas among the color difference signals of the third captured image.