How to make Imagemagick show the colorspace as Uncalibrated/Unknown/Undeclared when it is undeclared?

Question

I use the identify command of ImageMagick to retrieve exif of a photo. ImageMagick, unlike exiftool, returns sRGB when the colorspace has been undeclared. How can I make ImageMagick return either Uncalibrated or Unknown or Undeclared when it is the case?

Answer 1

Fred's right. You'll need to use some additional utilities (like awk) in addition to some -format [EXIF:*] magick.

identify -format '%[EXIF:Col*ce]\n' input_file.tif | \
   awk '{ if (length($0)) { print $0; exit } else { print "Uncalibrated" }}'

This works by invoking a query (*) character which will attempt to return a list of key-matches. If the key EXIF:Colorspace is set, awk will print it, else "Uncalibrated" would be returned.

Another option is identify -debug Coder input_file.tif which will dump all the data-points ImageMagick extracts from the image format. But that may be overkill.