Visual Parameter Controller for Video Dynamic Range Optimization
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Solution Overview
Problem
Capturing devices have a limited dynamic range, making it difficult to achieve the full dynamic range experienced by the human eye, leading to issues like saturation and clipping in video signals.
Innovation Solution
A visual-parameter automatic controller adjusts brightness, contrast, and color parameters of capturing devices based on real-time analysis of video frames to optimize the dynamic range and reduce clipping and saturation, mimicking the human visual system's perception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If capturing devices are used to capture video signals, then video signals can be obtained for processing and storage, but the dynamic range is limited and cannot achieve the full dynamic range experienced by the human eye
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting visual parameters (brightness, contrast, saturation) of the capturing device based on real-time analysis of video frame characteristics. The controller modifies these parameters to expand the effective dynamic range of the captured video signal, allowing the system to capture a broader range of luminance values that better match human visual perception despite the hardware limitations of the capturing device.
2Manufacturing precision
If visual parameters are adjusted to expand dynamic range, then video clarity and detail capture are improved, but saturation and clipping issues occur without proper control
Solution Approach 1:
The patent implements a feedback mechanism where the controller continuously analyzes video frames to detect saturation and clipping conditions, then adjusts visual parameters in response to this feedback. The system monitors the distribution of pixel luminance values and modifies brightness, contrast, and saturation parameters dynamically to prevent harmful saturation and clipping effects while maintaining expanded dynamic range and improved video quality.
Data Source
AI summary
Embodiments of the invention are directed to a system and method for controlling visual parameters of a capturing device to minimize clipping and saturation according to predefined parameters. The method may include processing pixel values of a current input frame of a received video signal captured by a capturing device; accumulating processing results of the current input frame to processing results of one or more previous input frames and calculating a desired dynamic range based on pre-determined user parameters. The processing may further include checking if the accumulated results are within the desired dynamic range and determining if adjustment is desired. If the accumulated results are not within the desired dynamic range, adjusting visual parameters for a subsequent input frame, by controlling the capturing device and if the accumulated results are within the desired dynamic range maintaining current visual parameters of the current input frame for the subsequent input frame.