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Thread: JPEG Lossless Crop Fails on Automatically Rotated Images

  1. #1
    IV Newbie
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    Sep 2008
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    Unhappy JPEG Lossless Crop Fails on Automatically Rotated Images

    The JPEG lossless crop fails when applied to images that have been automatically rotated due to EXIF information. I'm assuming that it does not map the coordinates correctly to the rotated image and so tries to crop an area that does not exist and so it fails.

    Affects Irfanview 4.28 and probably 4.30 as well seeing as this is not mentioned in the changelog.

  2. #2
    Professional User Mij's Avatar
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    Mar 2007
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    Camberley, Surrey, UK
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    IrfanView 4.51
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    Default

    This was reported some time ago here but nothing appears to have changed. As I tried to explain then it is not obvious how to solve the problem.
    My advice is to turn off the Auto-rotate feature if you plan to use lossless operations.

  3. #3
    IV Newbie
    Join Date
    Jun 2018
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    Default JPG Lossless Crop Plugin

    In this version is a bug relating to JPG lossless crop plugin. You have a Jpg picture which has the EXIF orientation other than "Top left". Now if you made a selection and use the lossless crop, then it crops to a wrong selection.

    OS: Windows 10
    IrfanView 4.51 64 bit
    IrfanView plugins 4.51 64 bit

  4. #4
    Moderator Enterprise User Bhikkhu Pesala's Avatar
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    East London
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    IrfanView 4.51
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    As advised by Mij, turn off the Auto-rotate feature if you plan to use lossless operations.

    It is not easy to fix this issue.

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