Video Intensity Correction Circuit for Surveillance
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Solution Overview
Problem
Video surveillance systems face challenges in maintaining image quality and reducing data processing requirements, particularly in high-definition video surveillance, due to issues with intensity variations and bandwidth constraints.
Innovation Solution
A method and integrated circuit for providing intensity correction in video frames using a combination of global and local intensity correction techniques, which evaluate differences between frames and apply correction factors to optimize image quality while minimizing data processing and bandwidth requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If global intensity correction is applied to all blocks, then processing complexity is reduced, but image quality deteriorates in regions with local intensity variations
Solution Approach 1:
The patent applies local intensity correction selectively to specific blocks based on intensity difference thresholds. The system evaluates each block's intensity variation and applies correction only when necessary, rather than uniformly to all blocks. This resolves the contradiction by making the correction approach adaptive to local conditions, improving image quality in regions with intensity variations while avoiding unnecessary processing in uniform regions.
2Manufacturing precision
If local intensity correction is applied to all blocks, then image quality improves, but data processing requirements increase
Solution Approach 1:
The patent implements partial local intensity correction by applying correction only to blocks that exceed a predetermined intensity difference threshold. Instead of processing all blocks with local correction, the system selectively processes only those blocks where it is necessary. This resolves the contradiction by performing partial correction action, improving image quality where needed while minimizing overall data processing requirements.
3Manufacturing precision
If intensity correction is applied, then image quality improves, but bandwidth requirements increase
Solution Approach 1:
The patent transmits only the necessary correction parameters for blocks that require local intensity correction, rather than transmitting correction data for all blocks. The system identifies blocks with intensity variations exceeding the threshold and sends correction information only for those specific blocks. This resolves the contradiction by reducing the quantity of transmitted data to only what is necessary for improving image quality in affected regions.
Data Source
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AI summary
A method of providing intensity correction for a video is disclosed. The method may comprise evaluating (602) a portion of a frame of the video; determining (604) a difference in intensity of a current block of the frame with the corresponding block of the previous frame; correcting (607) all blocks of the frame with local intensity correction if a first set of parameters is met; and correcting (608,614) the current block of the frame with both global intensity correction and local intensity correction if the first set of parameters is not met. An integrated circuit (202) having a circuit for providing intensity correction for a video is also disclosed.