XnView Software

Copied from “Question to various rotate”:

1. Download Karl02's suite of test images (exif-orientation-testimages-v2.rar).
2. Extract F2_5.jpg (EXIF orientation: 5 = left/top).
3. Remove the write protection attribute from F2_5.jpg.
4. Make a copy of F2_5.jpg.
5. Rename F2_5.jpg to cmd_rotate90.jpg,
   and Copy of F2_5.jpg to cmd_lrotate90.jpg.
6. Start XnViewMP.
7. Make sure the following settings are activated:
   • General » File operations » Keep original date/time
     • Lossless transformations
   • Browser » Misc. » Rotation
     • Change EXIF orientation ONLY (if possible)
     • Use lossless rotation (if possible)
8. Select the thumbnail of cmd_lrotate90.jpg in the browser and hit Ctrl+Shift+R (= cmd_lrotate90).
   1. Warning message: “JPEG lossless operation will modify original file(s), and may remove some unused pixels (width and height must be multiple of 8 pixels)! Do you want to continue?”
   2. The image is rotated 90° clockwise.
   3. The dimensions are changed from W255×H239 to W224×H255.
   4. The EXIF orientation flag is reset to 1 (top/left).
   5. The file's timestamp remains the same.
9. Select the thumbnail of cmd_rotate90.jpg in the browser and click the Rotate clockwise (= cmd_rotate) button on the main toolbar.
   • No changes are made to the file
     Expected behavior: Steps 8a through 8e

See Issue 918 for details.

This problem is supposed to be fixed in v0.82 or later. Could you please check and confirm, XnTriq?

Configuration:

• Tools → Settings... → Browser → Misc. → Rotation
  • [×] Change EXIF orientation ONLY (if possible)
    [×] Use lossless rotation (if possible)

Test image:

• F2_1.jpg from Karl02's suite of test images
  

  

  F2_1.jpg (9.3 KiB) Viewed 1148 times

  Code: Select all

                {Width}: 239 pixels
               {Height}: 255 pixels
     {EXIF:Orientation}: top-left (1)
               {Size B}: 9'521 bytes

Results:

• cmd_rotate90 (Toolbar → Rotate clockwise)
  

  

  cmd_rotate90.jpg (9.3 KiB) Viewed 1148 times

  Code: Select all

                {Width}: 255 pixels
               {Height}: 239 pixels
     {EXIF:Orientation}: right-top (6)
               {Size B}: 9'521 bytes

• cmd_lrotate90 (Tools → JPEG lossless transformations → Rotate clockwise)
  

  

  cmd_lrotate90.jpg (9.03 KiB) Viewed 1148 times

  Code: Select all

                {Width}: 240 pixels
               {Height}: 239 pixels
     {EXIF:Orientation}: top-left (1)
               {Size B}: 9'249 bytes

For comparison:

• F2_1.jpg rotated 90° CW with Guido Vollbeding's Jpegcrop v2015.12
  

  

  jpegcrop.jpg (9.03 KiB) Viewed 1142 times

  Code: Select all

                {Width}: 240 pixels
               {Height}: 239 pixels
     {EXIF:Orientation}: top-left (1)
               {Size B}: 9'249 bytes

  [×] Transform Trim Edges (= Drop non-transformable edge blocks = Discard partial MCUs)
  

  

  p138995.png (6.04 KiB) Viewed 1142 times

Except for the embedded thumbnails (not automatically updated by Jpegcrop), cmd_lrotate90.jpg and jpegcrop.jpg are identical.

Thank you for your testing, XnTriq. The problem is fixed, right?

helmut wrote:Thank you for your testing, XnTriq. The problem is fixed, right?

Yes, confirmed fixed
Moved to “Closed/Resolved”