Legacy ImageMagick Discussions Archive

There is definitely an issue with conversion of CMYK TIFF images with JPEG compression in version 6.8.6-9.
After conversion the black channel is blank and the CMY channels are altered, producing a result looking almost like a negative image.

The same image conversion in version 6.7.9-9 produces a ...

I know that I could rework the command to substitute -resample with -density and -resize/-geometry but since I never know the properties of incoming images in advance I would need to interrogate each image in order to build an appropriate command.
-resample is a wonderful shortcut that would allow ...

Is this something you would consider fixing/adding in the near future?

Me no -- I have enough to do. But it is possible that "Magick" would.

I have an issue with resampling.

I cannot get -resample to prohibit upsampling.

I am trying the following:
convert "infile.psd"[0] -resample 300x300> "outfile.tif"
since I only want to downsample very high resolution files and leave lower resolution files untouched.

Upsampling is usually a bad ...