Image Processing Shine Correction via Dynamic Parameter Adjustment
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Solution Overview
Problem
Existing image processing technologies fail to effectively reduce shine in facial areas of images, leading to unfavorable impressions due to overexposure and loss of color information, especially when ambient light or flash is reflected by skin surfaces.
Innovation Solution
An image processing apparatus that detects predetermined subjects, such as faces, and adjusts the correction amount for high luminance areas based on feature information from multiple image regions to perform shine correction, ensuring accurate and uniform image processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If correction processing is performed on high luminance areas without adjustment, then shine reduction is achieved in individual face regions, but correction nonuniformity occurs when multiple face regions are present
Solution Approach 1:
The patent adjusts the correction amount parameter based on the number of detected face regions. When multiple face regions are detected, the correction amount is reduced compared to when a single face region is detected. This dynamic parameter adjustment ensures uniform correction across all face regions while preventing over-correction that would cause unnatural appearances.
2Ease of operation
If high luminance areas are corrected using fixed correction amounts, then processing simplicity is maintained, but natural appearance is lost due to over-correction or under-correction
Solution Approach 1:
The system automatically adjusts the correction amount parameter based on detected face region characteristics. For single face regions, a larger correction amount is applied; for multiple face regions, a smaller correction amount is applied. This automatic parameter adaptation maintains processing simplicity while achieving natural-looking correction results.
Solution Approach 2:
The correction process uses feedback from face region detection results to determine appropriate correction amounts. The detection unit identifies the number and characteristics of face regions, and this information feeds back to the correction unit to adjust the correction amount accordingly, ensuring natural appearance preservation.
3Manufacturing precision
If correction amount is increased to reduce shine effectively, then shine reduction performance improves, but color information loss increases and unnatural appearance occurs
Solution Approach 1:
The patent dynamically adjusts the correction amount parameter based on the number of detected face regions to optimize the balance between shine reduction and color information preservation. By reducing the correction amount when multiple face regions are detected, the system prevents over-correction that would cause color information loss and unnatural appearance, while still effectively reducing shine in each region.
Data Source
AI summary
In an image processing apparatus, a face detection unit detects a face area from an input image, and an image processing unit extracts a high luminance area from the face area to generate a correction amount of the high luminance area and corrects the high luminance area using the correction amount. Then, in a case where a plurality of face areas is detected, the image processing unit adjusts the correction amount based on feature information of the plurality of face areas.