Front-end Scaler Circuit for Demosaiced Image Data
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Solution Overview
Problem
Existing image processing pipelines face challenges in efficiently demosaicing raw image data from different formats without increasing system resource consumption, particularly when handling Quad Bayer image data, which requires additional memory and processing resources.
Innovation Solution
A multi-mode demosaicing circuit that can handle both Bayer and Quad Bayer raw image formats, utilizing shared line buffers and arithmetic logic to demosaic and interpolate green channels, and a shared memory system that adjusts memory usage based on the original raw image format, allowing for efficient demosaicing and post-processing without increasing memory requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate demosaicing circuits are used for different raw image formats, then processing capability for multiple formats is improved, but device complexity and resource consumption increase
Solution Approach 1:
The patent implements a universal demosaicing circuit that can process multiple raw image formats (Bayer, Quad Bayer, etc.) through a single unified architecture. The circuit uses format-agnostic processing stages including gradient calculation, directional filtering, and interpolation that work across different color filter arrays, eliminating the need for separate dedicated circuits for each format while maintaining full processing capability.
Solution Approach 2:
The patent employs dynamic configuration where the demosaicing circuit adapts its operation based on the detected input format. Control logic dynamically adjusts processing parameters and data flow paths according to the specific format being processed, allowing one circuit to efficiently handle multiple formats without requiring static separate circuits for each format type.
2Productivity
If dedicated memory is allocated for each demosaicing circuit, then processing efficiency is improved, but memory resource consumption increases
Solution Approach 1:
The patent merges the memory resources of multiple demosaicing circuits into a single shared memory pool. The unified demosaicing circuit dynamically allocates and shares line buffers and intermediate data storage across different processing modes and formats, eliminating redundant memory allocations while ensuring sufficient buffer capacity for simultaneous or sequential processing of various image formats.
3Manufacturing precision
If format-specific post-processing operations are performed, then image quality is improved, but processing time and complexity increase
Solution Approach 1:
The patent applies local quality processing where post-processing operations are selectively applied based on the specific format and content requirements. The unified circuit performs format-appropriate processing stages (e.g., specific interpolation methods for Bayer vs. Quad Bayer) only where needed, rather than applying all possible processing operations uniformly, thereby maintaining image quality while reducing unnecessary processing time.
Data Source
AI summary
Embodiments relate to a front-end scaler circuit configured to receive and process demosaiced image data in different modes depending on if the demosaiced image data was demosaiced from Bayer or Quad Bayer raw image data. The front-end scaler circuit shares memory with a demosaicing circuit, and is configured to perform different operations that use different amounts of the shared memory based on the original image format of the demosaiced image data being processed, to compensate for additional memory utilized by the demosaicing circuit when demosaicing certain types of image data. For example, when processing image data demosaiced from Quad Bayer image data, the front-end scaler circuit discards a portion of the chrominance component data for the received image data before performing chromatic suppression, compared to when processing image data demosaiced from Bayer image data.