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RAW camera DPCM compression performance analysis

Bouman, Katherine and Ramachandra, Vikas and Atanassov, Kalin and Aleksic, Mickey and Goma, Sergio R. (2011) RAW camera DPCM compression performance analysis. In: Image Quality and System Performance VIII. Proceedings of SPIE. No.7867. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 78670N. ISBN 9780819484048.

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The MIPI standard has adopted DPCM compression for RAW data images streamed from mobile cameras. This DPCM is line based and uses either a simple 1 or 2 pixel predictor. In this paper, we analyze the DPCM compression performance as MTF degradation. To test this scheme's performance, we generated Siemens star images and binarized them to 2-level images. These two intensity values where chosen such that their intensity difference corresponds to those pixel differences which result in largest relative errors in the DPCM compressor. (E.g. a pixel transition from 0 to 4095 corresponds to an error of 6 between the DPCM compressed value and the original pixel value). The DPCM scheme introduces different amounts of error based on the pixel difference. We passed these modified Siemens star chart images to this compressor and compared the compressed images with the original images using IT3 MTF response plots for slanted edges. Further, we discuss the PSF influence on DPCM error and its propagation through the image processing pipe.

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Bouman, Katherine0000-0003-0077-4367
Additional Information:© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).
Subject Keywords:MIPI, DPCM, RAW, compression, MTF
Series Name:Proceedings of SPIE
Issue or Number:7867
Record Number:CaltechAUTHORS:20190405-164254906
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Official Citation:Katherine Bouman, Vikas Ramachandra, Kalin Atanassov, Mickey Aleksic, and Sergio R. Goma "RAW camera DPCM compression performance analysis", Proc. SPIE 7867, Image Quality and System Performance VIII, 78670N (24 January 2011); doi: 10.1117/12.872637;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:94526
Deposited By: George Porter
Deposited On:09 Apr 2019 15:57
Last Modified:03 Oct 2019 21:04

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