|Open||None||T43371 Thumbnail/imagescaler (tracking)|
|Open||None||T192309 Thumbnails for specific TIFF pages have small rendering errors, ugly edges, glow missing|
Is the TIF scaled down before the thumbnail is created? If so, the bug might be easily "fixable" as a workaround, by reversing the process: Generate the large JPG and scale that down. Because that seems to work nicely.
Oh, this is a very weird, possibly broken TIFF file. Opening it in GIMP looks very different again!
Note how black the right half is! Exporting this file as PNG creates this image:
Atmospheric glow missing!
(scaled down to 1000px for upload)
The real surprise came when I added a white layer above the original TIFF:
The TIFF file contains "TIFF channels", additionally to the RGB channels. Two of them:
(This is an animated GIF, click to play!)
I have never seen such an unusual file before. It should be replaced by a PNG, solving all problems.
This file comes straight from NASA. If you find any evidence of a fake moon landing in those channels let us know. ;-)
Converting it to PNG is something I wanted to do as well.. Except I had trouble opening the file as well. I'll ask someone else.
I had to load the images in my PDF viewer, print them to a file, use the gimp and presto png?? I checked to be sure the conversion went well and they look just like the jpg files from NASA, minus the compression artifacts.
@ToBeFree : thanks for the help! I'm not sure if this bug should be fixed or not. It probably needs to be fixed in some library Wikimedia uses.