updating from image v0.24 to image v0.25 is causing colour distortions

[lovasoa]

Hello !

I don't have the time to investigate more deeply on this, but I wanted to let you know. Updating from image-rs v0.24 to v0.25 causes serious color distortions in decoded jpeg images.

This can be reproduced by compiling dezoomify-rs against the two different versions of image-rs.

I fixed the issue in dezoomify-rs by downgrading image-rs, but I thought this may be worth sharing here.

The detailed reproduction steps are here: https://github.com/lovasoa/dezoomify-rs/issues/259#issuecomment-2373567635

My best guess is that image tiles like these are not decoded properly: tiles.zip

[lovasoa]

Interesting, and may be relevant: the gnome file browser image previews are also decoded with incorrect colors, but the gnome image viewer gets the right colors (same as image-rs v0.24):

[lovasoa]

The problem may come from the embedded color profile in the image (Prophoto RGB) which was correctly interpreted in v0.24 and ignored in v0.25.

Here is the output of imagemagick identify:

``` $ identify -verbose /tmp/original-server-tile.jpg Image: Filename: /tmp/original-server-tile.jpg Permissions: rw-r--r-- Format: JPEG (Joint Photographic Experts Group JFIF format) Mime type: image/jpeg Class: DirectClass Geometry: 512x512+0+0 Units: Undefined Colorspace: sRGB Type: TrueColor Base type: Undefined Endianness: Undefined Depth: 8-bit Channels: 3.0 Channel depth: Red: 8-bit Green: 8-bit Blue: 8-bit Channel statistics: Pixels: 262144 Red: min: 32 (0.12549) max: 243 (0.952941) mean: 207.67 (0.814391) median: 214 (0.839216) standard deviation: 20.2158 (0.0792778) kurtosis: 18.5473 skewness: -3.903 entropy: 0.620616 Green: min: 24 (0.0941176) max: 240 (0.941176) mean: 197.969 (0.77635) median: 206 (0.807843) standard deviation: 23.8466 (0.0935161) kurtosis: 13.2825 skewness: -3.14624 entropy: 0.714602 Blue: min: 16 (0.0627451) max: 227 (0.890196) mean: 178.239 (0.698975) median: 184 (0.721569) standard deviation: 19.1504 (0.0750995) kurtosis: 21.8043 skewness: -3.9469 entropy: 0.676309 Image statistics: Overall: min: 16 (0.0627451) max: 243 (0.952941) mean: 194.626 (0.763239) median: 201.333 (0.789542) standard deviation: 21.0709 (0.0826311) kurtosis: 17.878 skewness: -3.66538 entropy: 0.670509 Rendering intent: Perceptual Gamma: 0.454545 Chromaticity: red primary: (0.64,0.33,0.03) green primary: (0.3,0.6,0.1) blue primary: (0.15,0.06,0.79) white point: (0.3127,0.329,0.3583) Matte color: grey74 Background color: white Border color: srgb(223,223,223) Transparent color: black Interlace: None Intensity: Undefined Compose: Over Page geometry: 512x512+0+0 Dispose: Undefined Iterations: 0 Compression: JPEG Quality: 76 Orientation: Undefined Profiles: Profile-exif: 40 bytes Profile-icc: 868 bytes Properties: comment: (C) Google Inc. date:create: 2024-09-25T09:24:48+00:00 date:modify: 2024-09-25T09:24:48+00:00 date:timestamp: 2024-09-25T13:02:32+00:00 exif:Software: Picasa icc:copyright: Copyright (c) Eastman Kodak Company, 1999, all rights reserved. icc:description: ProPhoto RGB icc:manufacturer: KODAK icc:model: Reference Output Medium Metric(ROMM) jpeg:colorspace: 2 jpeg:sampling-factor: 1x1,1x1,1x1 signature: 1d40f53ad2a16840aa7c4f4fdfb06e4e361710ea69ce3afdf24d102118c0f48c Artifacts: verbose: true Tainted: False Filesize: 25514B Number pixels: 262144 Pixel cache type: Memory Pixels per second: 31.0766MP User time: 0.010u Elapsed time: 0:01.008 Version: ImageMagick 7.1.1-33 Q16-HDRI x86_64 22263 https://imagemagick.org ```

original tile	tile with the embedded color profile stripped