It seems that "compare" outputs everything to STDERR. Why?

[mattalexx]

It seems that "compare" outputs everything to STDERR. Is there a reason for this? It's making things a little confusing on my end.

Thanks.

[magick]

Not a bug.

It seems that "compare" outputs everything to STDERR. Is there a reason for this?

Why sure, otherwise the difference image is stuffed up if you write it to STDOUT:

• compare -metric psnr image.png reconstruct.png png:-