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PRB: Thumbnails for Some JPEG Files Are Too Dark (Image Uploader for Java)
Rank: Advanced Member
Groups: Member, Administration, Moderator Joined: 7/28/2003(UTC) Posts: 1,660
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This article describes why thumbnails for some JPEG images may be too dark if they are rendered with Java version of Image Uploader.OverviewWhen Java version of Image Uploader is used to upload JPEG files, under certain conditions the generated thumbnails will be way too dark, as on the picture below. Thumbnail generated with Image Uploader Normal thumbnail How to ReproduceThis problem occurs only in Java version of Image Uploader with JPEG files created with Nikon cameras which have the ICC profile "Nikon sRGB 4.0.0.3001." under the following conditions: - Thumbnail size larger than EXIF thumbnails (typically 160 pixels).
- Thumbnail resize quality is Medium.
ReasonWhen Medium quality is used, Image Uploader uses the Java ImageIO library to read the image. Due a bug in this library, it reads JPEG files created with Nikon cameras which have the ICC profile "Nikon sRGB 4.0.0.3001." incorrectly. For more details see bug 6372769 in the Java bug database. SolutionCurrently the only solution of this problem is to set the resize quality to High: Code:iu.addParam("PreviewThumbnailResizeQuality", "High");
This bug should be fixed by Java developers in the next release of the Java platform. NotesThis problem does not concern neither ActiveX version of Image Uploader, nor any JPEG files with ICC profiles different from "Nikon sRGB 4.0.0.3001." |
Best regards, Fedor Skvortsov
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Rank: Member
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Joined: 3/20/2007(UTC) Posts: 21
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Hello, we have the same problem also with ActiveX version.
We use 4,7,16,0 version.
PETER
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Rank: Advanced Member
Groups: Member, Administration, Moderator Joined: 8/3/2003(UTC) Posts: 1,070
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jps26401 wrote: we have the same problem also with ActiveX version. We use 4,7,16,0 version.
Hello Peter, Could you post a case and attach this image there? |
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Rank: Member
Groups: Joined: 3/28/2007(UTC) Posts: 3
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One of our users reported this issue this past week. All of his thumbnails appear darkened.
We're using Version 6.0 Feb 21, 2009 and the problem only occurs when uploading on a Mac (10.4 in test). It happens in both Safari 4 and Firefox 3.5.
Stripping the EXIF data from the jpg before uploading seems to resolve the issue but this should be addressed properly in an update.
We haven't tried the high quality thumb fix mentioned above.
I'll open a case and send a sample image.
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Rank: Advanced Member
Groups: Member, Administration, Moderator Joined: 8/3/2003(UTC) Posts: 1,070
Thanks: 1 times Was thanked: 12 time(s) in 12 post(s)
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Hello,
We confirm, the problem still exists. Actually this is issue in JRE implementation on Mac. Nevertheless we realize that it is important problem because photos made by Nikon cameras are not handled by Image Uploader correctly on Mac computers. We will try to find a solution till the next minor release. |
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Aurigma Forums
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Upload Suite
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FAQ – ActiveX/Java Uploader
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PRB: Thumbnails for Some JPEG Files Are Too Dark (Image Uploader for Java)
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