Compression

Data compression and transmission losses

Data compression and transmission losses can have a significant effect on image quality. The right side of the image on the left has been saved as a low quality JPEG. Banding, loss of low-contrast detail, and "waviness" near edges are visible.

A full analysis of data compression and transmission losses is not yet available in Imatest.

Some of these losses, especially the loss of low-contrast detail, can be analyzed with the Log F-contrast module in Rescharts. A more detailed analysis of compression losses is under development.