Legacy ImageMagick Discussions Archive

Thanks! That fixed my problem.

Hi all, There seems to be a bug in the TIFF EXIF handling in ImageMagick 6.7.3-2. The TIFFGetEXIFProperties function holds the offset variable in a uint32, but the TIFF format seems to support up to 64 bits data. From tiff.c... static void TIFFGetEXIFProperties(TIFF *tiff,Image *image ...

Use identify to check the jpeg:subsampling-factor property. Subsampling values other than 1x1 are not valid for CMYK JPEGs and can result in this sort of blurring.

I would think ImageMagick should reset this when you convert an RGB JPEG to CMYK, but it doesn't seem to (at least in v.6.6..

I'm using ImageMagick to convert RGB JPEG images to CMYK for print purposes. However, some of the JPEGs are coming across blurred after the conversion. After playing around with images, I think I've narrowed it down to JPEGs that were saved with subsampling (ie, 2x2, 2x1, etc). Images that were ...