Image Processing System Brightness Variation Reduction
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Solution Overview
Problem
The prolonged use of screens for extended periods leads to eye fatigue and discomfort due to significant brightness variations between consecutive frames or groups of frames in image content, causing visual strain and discomfort for users.
Innovation Solution
The method involves identifying and modifying brightness variations between image frames by calculating a rolling average of luminance, adjusting frame brightness relative to this average, applying threshold values, and modifying contrast to reduce brightness variations, thereby smoothing the luminance curve and enhancing user comfort during screen use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If brightness variations between consecutive frames are significant, then image content can maintain dynamic visual interest and detail, but user comfort deteriorates due to eye fatigue and visual strain
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the brightness parameter of image frames based on calculated luminance values and rolling averages. The system modifies brightness values within specific ranges (e.g., 0-255 for 8-bit images) to reduce excessive variations while preserving acceptable dynamic range, thereby improving user comfort without sacrificing visual quality.
Solution Approach 2:
The patent implements feedback by continuously calculating luminance values for consecutive frames, comparing them against rolling averages, and using this information to guide brightness adjustments. This closed-loop approach ensures that brightness modifications are based on actual frame-by-frame analysis, adapting to changing scene conditions in real-time.
2Illumination intensity
If brightness variations between frames are reduced, then user comfort improves, but the dynamic visual quality and detail of image content may deteriorate
Solution Approach 1:
The patent applies local quality by differentiating between acceptable and unacceptable brightness variations. Rather than uniformly smoothing all brightness changes, the system targets only excessive variations that exceed predetermined thresholds, preserving acceptable dynamic changes that enhance visual interest while eliminating only those that cause discomfort.
Solution Approach 2:
The patent implements partial action by applying brightness modifications only to the extent necessary to reduce uncomfortable variations, rather than completely eliminating all brightness changes. The system uses controlled adjustment ranges and thresholds to achieve sufficient comfort improvement without over-smoothing that would degrade visual quality.
3Ease of operation
If brightness modifications are applied to reduce variations, then user comfort improves, but processing complexity and computational requirements increase
Solution Approach 1:
The patent applies preliminary action by pre-calculating rolling averages of luminance values and establishing brightness adjustment ranges before processing individual frames. This preparation step simplifies the main processing loop, as the system only needs to compare current frame luminance against pre-computed averages and apply adjustments within predetermined parameters.
Solution Approach 2:
The patent replaces complex real-time analysis with simpler computational operations by using rolling averages and predetermined thresholds. Instead of analyzing every possible brightness combination or using complex adaptive algorithms, the system uses straightforward arithmetic operations on luminance values to achieve brightness normalization.
Data Source
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AI summary
A content processing system for modifying the brightness of one or more image frames of content, the system comprising a content analysis unit operable to identify brightness information for each of two or more image frames within the content, a variation detection unit operable to detect a variation in the brightness of at least two image frames within the content, and a brightness modification unit operable to modify the brightness of one or more image frames in dependence upon the detected brightness variation so as to reduce the variation in brightness between frames of the content.