Image Correction Coefficients for Gamma Curve Color Consistency
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Solution Overview
Problem
Existing image correction methods fail to account for adjustments to the gamma curve of image acquisition devices, leading to inconsistencies between colors captured by the device and perceived by human eyes, resulting in color distortion.
Innovation Solution
A system and method that adjusts the correction coefficient based on the gamma curve adjustment of the image acquisition device, using reference color information and correction coefficients to align with human perception, thereby reducing or eliminating color distortion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing image correction methods are used without considering gamma curve adjustments, then the correction process is simple, but color distortion occurs and color accuracy deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction coefficients for multiple gamma curve parameters before actual image correction is needed. When gamma curve adjustment occurs, the system directly retrieves the corresponding pre-computed correction coefficients rather than calculating them in real-time, thus improving color accuracy while avoiding complex real-time computations
Solution Approach 2:
The patent introduces correction coefficients as an intermediary element between the gamma curve adjustment and the final image correction. These coefficients serve as a mediator that translates gamma curve parameter changes into appropriate color corrections, decoupling the complexity of gamma adjustment from the color correction process while maintaining accuracy
2Reliability
If correction coefficients are adjusted to account for gamma curve changes, then color distortion is reduced, but the correction process becomes more complex
Solution Approach 1:
The system performs preliminary calculations to determine correction coefficients for various gamma curve adjustment scenarios in advance. By pre-computing these coefficients and storing them in a lookup table, the system ensures color consistency when gamma adjustments occur while avoiding the need for complex real-time coefficient calculations
Solution Approach 2:
The patent systematically varies gamma curve parameters and computes corresponding correction coefficients for each parameter combination. This methodical approach to parameter changes allows the system to cover a range of possible gamma adjustments with pre-computed coefficients, ensuring reliable color correction without requiring complex runtime algorithms
Data Source
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AI summary
The present disclosure provides methods and systems for image correction. The method may include obtaining a first frame captured by an image acquisition device, a second frame captured by the image acquisition device prior to the first frame, and a correction coefficient of the first frame; determining, based on the first frame and the second frame, whether a gamma curve of the image acquisition device has been adjusted; in response to determining that the gamma curve of the image acquisition device has been adjusted, determining an adjustment coefficient of the correction coefficient based on the first frame and the second frame; and adjusting, based on the adjustment coefficient, the correction coefficient of the first frame.