Bayer Sensor Interpolation Circuit Using Region Flipping
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Solution Overview
Problem
Current image processing methods for four-cell Bayer sensors require multiple interpolation techniques and additional de-mosaic processes, leading to increased design and manufacturing costs and potential loss of image details due to varying pixel positions and weightings.
Innovation Solution
An image processing method that uses a single interpolation technique by selecting a region for each pixel, determining if color information needs to be flipped, and performing interpolation using color information from that region or its flipped version to generate missing color information, thereby reducing the need for multiple interpolation circuits and algorithms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple interpolation techniques and de-mosaic processes are used to process raw image data from a four-cell Bayer sensor, then image processing accuracy is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The patent combines multiple interpolation techniques and de-mosaic processes into a single unified interpolation operation. By merging these separate processing steps into one integrated approach, the system achieves accurate color information recovery without requiring multiple distinct circuits or algorithms, thus reducing device complexity while maintaining processing accuracy.
Solution Approach 2:
The patent creates a universal interpolation method that can handle all pixel types in the four-cell Bayer sensor array using a single algorithmic approach. This multi-functional interpolation circuit can process different pixel positions and color combinations uniformly, eliminating the need for multiple specialized interpolation circuits for different pixel scenarios.
2Measurement precision
If multiple interpolation circuits and algorithms are used to handle different pixel positions, then interpolation accuracy is improved, but manufacturing costs increase
Solution Approach 1:
The patent implements a universal interpolation circuit that can accurately process all pixel positions and color combinations through a single algorithmic framework. This multi-functional approach allows one circuit design to handle every interpolation scenario in the four-cell Bayer sensor, significantly reducing manufacturing costs by eliminating the need for multiple specialized circuits.
Solution Approach 2:
The patent adjusts interpolation parameters dynamically based on pixel position and color type within a unified circuit architecture. By changing parameters rather than changing the entire circuit configuration, the system maintains high interpolation accuracy for all pixel types while using a single manufacturable circuit design.
3Ease of operation
If a re-mosaic process is performed before de-mosaic technology, then color information is reorganized, but image details are lost impacting image quality
Solution Approach 1:
The patent extracts and processes color information directly from the raw sensor data without performing an intermediate re-mosaic step. By taking out the necessary color information from surrounding pixels and inserting it directly into the target pixel through a single interpolation operation, the system avoids the information loss that would occur during repeated de-mosaic operations.
Solution Approach 2:
The patent skips the traditional re-mosaic and de-mosaic sequence by rushing through directly to a single interpolation operation. This approach bypasses the intermediate step that causes image detail loss, achieving efficient color information organization while preserving image quality.
Data Source
AI summary
An image processing method is provided, wherein the image processing method includes the steps of: receiving raw image data from an image sensor, wherein the image sensor is a four-cell Bayer sensor, the raw image data includes color information of each pixel, and the color information of each pixel only corresponds to a single color; for a specific pixel to be processed, selecting a region including the specific pixel; referring to a position of the specific pixel to determine whether to flip color information within the region to generate a flipped region; and using color information of at least one portion of pixels within the region or the flipped region to perform an interpolation operation, to generate color information that the specific pixel lacks.