Legacy ImageMagick Discussions Archive

• Hi,
  Please check below columns to understand Image flip issue with attached specific file ‘IMG_0233.jpg’ after conversion to Color TIFF.

• Subject ==> Picture flipped(mirror image) after conversion to Color TIFF - 25035150

• Problem description ==> We have a Customer issue for a specific image ‘IMG_0233.jpg’ file where image is flipped after conversion to Color/Grayscale, 300 or 200 resolution TIFF file using class ‘class MagickPPExport Image’. TIFF file viewed in IrfanView viewer.

• Replicate ==> We can see issue every time when we write code similar as in Code Snippet section below.

• Sample files ==> Attached Customer sample input file ‘IMG_0233.jpg’ and converted file ‘Converted - 2019-06-21T115901.857.tiff’.
  
  ‘IMG_0233.jpg’ - https://drive.google.com/open?id=1ZmTGQ ... qjp84L2wIF
  ‘Converted - 2019-06-21T115901.857.tiff’ - https://drive.google.com/open?id=1HvCtQ ... zXnghf0_pO

• Code Snippets ==>
  Image img;
  img.read(“IMG_0233.jpg”);
  img->density(300x300);//illustrative
  img->quality(50);
  img->resolutionUnits(PixelsPerInchResolution);
  img.compressType(JPEG); //illustrative
  img.type(TrueColour); //illustrative
  img.depth(8);
  img.write(“Converted - 2019-06-21T115901.857.tiff”);

• Component(s) ==> Image Magick Source build

• Support request ==> Please find the root-cause for Image getting flipped or mirror image of original after conversion to Color TIFF file.

Regards
Ganesh.

• Version ==> ImageMagick 7.0.8-12

• Support request ==> Please find the root-cause for Image getting flipped or mirror image of original after conversion to Color TIFF file.

Both your input and output files has Orientation: RightTop (= 6) value. Most viewer support orientation for JPEG but not for Tiff, that is the cause of the problem.
(If you see the files on Windows 7, both are rotated, because Windows 7 does not support orientation even for JPEG.)

So I suggest first rotate and/or flip the image to the stats of orientation = 1 (and set the orientation value to 1 or unset) somehow, then convert.
(From 6 to 1, rotate 90 degree clockwise. See https://magnushoff.com/jpeg-orientation.html for example.)

ImageMagick command line has -orient and -auto-orient option.

-auto-orient should do this work.

Thanks a lot 246246, for detailed explanation and the info on blog post. It was much helpful.

Regards,
Ganesh.

Thanks a lot 246246, for detailed explanation and the info on blog post. It was much helpful.

Regards,
Ganesh.