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Figure 2
Zoomed (100 × 100 pixels) images of the Hornby_b dataset (Kanitpanyacharoen et al., 2016BB14) after compression using noise bit reset and subsequent lossless compression (bzip2). The first column shows the uncompressed ground truth. The top rows show details taken from compressed projection images and respective line profiles (blue is the compressed signal, red the uncompressed ground truth) extracted along the centred vertical axis (indicated by the white dashed line in the left panels). The numbers indicate the actual achieved compression compared with the target one (in brackets). Note the posterization effect in the rightmost image, and the down-rounding of the actual achieved compression caused by the bit reset. The bottom rows show details taken from the corresponding tomographic reconstructions with the respective line profiles. Note the grain effect in the rightmost image. The numbers indicate the computed MSSIM values. The images share the same dynamic range as the line profiles.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 5| September 2020| Pages 1326-1338
https://doi.org/10.1107/S1600577520007353
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