Image Processing Apparatus Flare Pixel Correction
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Solution Overview
Problem
Existing image processing systems face challenges in accurately correcting pixel values affected by flare light, leading to deteriorated image quality due to differences in spectral characteristics between focus detection pixels and image pixels, which existing methods fail to address effectively.
Innovation Solution
An image processing apparatus that acquires pixel values from a detection pixel and its surrounding pixels, determines flare-affected pixels based on these values, and corrects pixel values using interpolation and weighting techniques to account for color differences and orientation information, thereby identifying and correcting pixels impacted by flare light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If offset correction is performed on pixels adjacent to focus detection pixels based on values of multiple image pixels, then flare influence is reduced, but correction accuracy is insufficient and unnecessary corrections occur
Solution Approach 1:
The patent applies local quality by differentiating between pixels that are actually affected by flare and those that are not. It identifies flare-affected pixels through specific criteria (comparing pixel values with surrounding pixels and detecting abnormal changes) and applies correction only to those identified pixels, rather than uniformly correcting all adjacent pixels. This selective approach improves correction accuracy while avoiding unnecessary corrections on non-affected pixels.
Solution Approach 2:
The patent implements feedback by using the pixel values of surrounding non-affected pixels as reference to determine whether correction is needed. The system compares pixel values of potential correction targets with their surrounding pixels to detect abnormal changes caused by flare, and only applies correction when such abnormalities are detected. This feedback mechanism ensures high precision in identifying truly affected pixels.
2Reliability
If correction is applied to all pixels adjacent to focus detection pixels, then flare influence is addressed, but unnecessary corrections reduce image quality
Solution Approach 1:
The patent applies local quality by differentiating between pixels that are actually affected by flare and those that are not. It identifies flare-affected pixels through specific criteria (comparing pixel values with surrounding pixels and detecting abnormal changes) and applies correction only to those identified pixels, rather than uniformly correcting all adjacent pixels. This selective approach improves correction accuracy while avoiding unnecessary corrections on non-affected pixels.
Solution Approach 2:
The patent implements feedback by using the pixel values of surrounding non-affected pixels as reference to determine whether correction is needed. The system compares pixel values of potential correction targets with their surrounding pixels to detect abnormal changes caused by flare, and only applies correction when such abnormalities are detected. This feedback mechanism ensures high precision in identifying truly affected pixels.
Data Source
AI summary
An image processing apparatus includes a pixel value acquisition circuit configured to acquire pixel values from image data that is generated by an imaging device including a detection pixel, and a pixel specification circuit configured to specify a flare-affected pixel that is affected by flare.