Legacy ImageMagick Discussions Archive

I am trying to resize TIFF and PSD files but retain all the channels. There could be as many as 25 channels. As I understand it, IM6 only supports up to 3+1 or 4+1 channels, and IM7 was supposed to resolve that (I believe). I've compiled IM7 on OSX (ImageMagick 7.0.0-0 Q16 x86_64) and trying to run the conversion via command-line, but really don't know where to begin. Is this even possible? Any help or direction would be greatly appreciated. Thank you.

Hello,
I am wondering if you ever got around to figuring out how to add additional channels to a tiff file?

If you can upload a tiff with more than 5 channels, I can test it with a fairly recent v7.

Do you really mean "channels" and not "layers"? If so, you need to use IM 7, but I do not think it has any multichannel reader or writer, yet, built-in. It can store multiple channels internally. I could be wrong and will defer to the IM developers.

ImageMagick V7 supports multi-channels but we have not enhanced any of the coders yet to take advantage of more than 5 channels. Doing so is on our radar but we have not had the time so far. As a reminder, the official release of ImageMagick V7 is April 30, 2016.

Yes, channels not layers. We use the channels as selection masks in Photoshop as well as clipping/alpha masks in InDesign. I know that IM7 supports >5 channels. I'll keep an eye out for the updates. Thanks!