Camera Contrast Curve Control for Light Blooming Reduction
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Solution Overview
Problem
Existing systems fail to effectively reduce the adverse effects of 'light blooming' caused by bright objects such as automobile headlights and sunlight, leading to nuisance visual elements, light pollution, obstructed views, and eye strain.
Innovation Solution
A system comprising a camera, electronic control unit, and visual display that detects blooming pixels and modifies contrast curves to generate a processed frame, reducing blooming while maintaining image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional image capture is used, then the camera captures the environment, but light blooming effects occur around bright light sources
Solution Approach 1:
The system modifies contrast curves of pixels based on detected light source characteristics, dynamically adjusting image processing parameters to reduce blooming effects while preserving image quality and edge details
2Object-affected harmful factors
If contrast curves are modified to reduce blooming pixels, then blooming is reduced, but image edges may become distorted
Solution Approach 1:
The system applies different contrast curve modifications to different regions of the image based on proximity to light sources, adjusting processing intensity locally to reduce blooming while preserving edge accuracy in non-blooming areas
Solution Approach 2:
The system iteratively adjusts contrast curves by comparing edge counts before and after processing, using feedback from edge detection to refine the blooming reduction algorithm and maintain edge fidelity
Data Source
AI summary
A system includes a camera, an electronic control unit, and a visual display. The camera is operational to acquire an acquired frame of an environment external to the system. The acquired frame has a plurality of pixels. The electronic control unit is coupled to the camera and is operational to detect one or more light sources in the acquired frame, determine a first number of a plurality of blooming pixels around the one or more light sources among the plurality of pixels, and generate a processed frame by modifying a plurality of contrast curves of the plurality of pixels to reduce the plurality of blooming pixels around the one or more light sources. The visual display is coupled to the electronic control unit and is operational to display the processed frame.