Lossless White Balance for Improved Lossless CFA Image and Video Compression.
basic_science · Level V
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- Record sourced from PubMed, PMID 35482698.
- Also identified by DOI 10.1109/TIP.2022.3169687.
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Abstract
Color filter array is a spatial multiplexing of pixel-sized filters fabricated over pixel sensors in most color image sensors. The state-of-the-art lossless coding techniques of raw sensor data captured by such sensors leverage spatial or cross-color correlation using lifting schemes. In this paper, we propose a lifting-based lossless white balance algorithm. When applied to the raw sensor data, the spatial bandwidth of the implied chrominance signals decreases. We propose to use this white balance as a pre-processing step to lossless CFA subsampled image/video compression, improving the overall coding efficiency of the raw sensor data.