- Joined
- Dec 27, 2014
- Messages
- 6,169
- Reaction score
- 7,357
- Points
- 373
- Location
- Germany
- Printer Model
- L805, WF2010, ET8550, T3100X
Profiling software typically has a function to create a page or more with color patches, let the user print those pages directly or save them for later use, such files are saved in .tiff format.
Do not ever try to save them into .jpg format e.g. after editing - adding comments etc or changing the size , the JPG un/compression algorithm will create for you lots of new colors you never dreamed about.

I cannot upload the original .tiff file here directly, about every image editing program has a hidden funtion - 'count unique colors' - this one displays 1101 colors - a few spots are double - probably some black spots.
Saving this file as a .jpg file and displaying it again will give you 177 453 unique colors - wow . The JPG arithmetic is pretty inventive here, most of the additonal colors are visible along edges - you typically can see those compression artifacts. The number of additional colors is related to the compression ratio, but in this case the number of colors is not compressed but expanded siginificantly.
Do not ever try to save them into .jpg format e.g. after editing - adding comments etc or changing the size , the JPG un/compression algorithm will create for you lots of new colors you never dreamed about.

I cannot upload the original .tiff file here directly, about every image editing program has a hidden funtion - 'count unique colors' - this one displays 1101 colors - a few spots are double - probably some black spots.
Saving this file as a .jpg file and displaying it again will give you 177 453 unique colors - wow . The JPG arithmetic is pretty inventive here, most of the additonal colors are visible along edges - you typically can see those compression artifacts. The number of additional colors is related to the compression ratio, but in this case the number of colors is not compressed but expanded siginificantly.