RAW Moving Image Compression via Bayer Array Separation
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Solution Overview
Problem
The efficiency of compression coding for RAW moving images is limited due to the high correlativity of same color components in Bayer arrays, which hinders effective compression and decoding processes.
Innovation Solution
A moving image compression device and decoding device that separate and alternately array the same color components from Bayer arrays, performing inter-frame prediction coding compression and decoding to improve compression efficiency by leveraging the high correlation between these components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If compression coding is performed on RAW moving images with Bayer array color components, then compression processing can be performed, but compression efficiency is limited due to high correlativity of same color components
Solution Approach 1:
The patent divides the Bayer array color components into separate groups: first pixel groups (odd rows, first color component), second pixel groups (even rows, first color component), third pixel groups (all rows, second color component), and fourth pixel groups (all rows, third color component). This segmentation allows independent processing of each color component group, enabling more effective compression by exploiting the high correlativity within each separated group without the limitations of processing all pixels together.
2Productivity
If same color components are separated and alternately arrayed, then inter-frame prediction coding can be performed effectively, but processing complexity increases
Solution Approach 1:
The patent performs preliminary separation of color components into first, second, third, and fourth pixel groups before compression coding. By pre-organizing the pixel data into logically separated groups with high intra-group correlativity, the system enables more effective inter-frame prediction coding. The preliminary arrangement facilitates better exploitation of temporal redundancy, allowing the compression algorithm to achieve higher compression ratios without excessive complexity during the actual compression process.
Data Source
AI summary
A moving image compression device has an obtaining unit, an image conversion unit, and a compression processing unit. The obtaining unit obtains a RAW moving image having plural frames associated in an order of imaging, the frames having pixels of three different color components which are disposed periodically according to a color array with two rows and two columns. The image conversion unit separates, in a target frame, a first pixel group corresponding to a first color component of odd rows and a second pixel group corresponding to the first color component of even rows, and alternately arrays, in a time base direction, a first image including the first pixel group and a second image including the second pixel group. The compression processing unit performs inter-frame prediction coding compression on the first image and the second image.