Labels: Type-Defect Priority-Medium
New issue 555 by flint...@gmail.com
: Webp has Yellow Tint on Scanned Images Produced with GIMP/XnConverthttps://bugs.chromium.org/p/webp/issues/detail?id=555
What steps will reproduce the problem?
The PNG for comparison is uploaded to Google Group conversation :https://groups.google.com/a/webmproject.org/g/webp-discuss/c/NDbo1APIxQ0
Direct image link:https://groups.google.com/a/webmproject.org/group/webp-discuss/attach/343fab42184df/1%20Ori%20PNG.png?part=0.2&view=1
1. Convert the original png to jpg-q75 & webp-q90
2. Using GIMP 2.10.80 (My Version) or XnConvert 1.92 x64
3. Open all those images with image viewers/GIMP to compare by alt-tabbing OR switching layers
What is the expected output? What do you see instead?
At webp-q90, obvious Yellow tint & discoloration (Darker/greyed out) was found.
Where jpg-q75 (~roughly same file sizes as webp-q90) performed much better, making much less obvious compression distortion.
Tried using lossless and the problem was
Personally, the only reason I am using webp at all, is because it was supposed to have higher compression capabilities, meaning smaller file sizes given the same image quality. However, this proves to be not always the case.
What version of the product are you using? On what operating system?
XnConvert 1.92 x64
Please provide any additional information below.
As an passer-by to image format technologies, I guess that may have to do with the color dot matrices of scanned images?? Pure guessing.
1 Ori PNG.png 3.1 MB
2 JPG at 75.jpg 687 KB
3 Webp at 90.webp 763 KB
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