ImageMagick – Format and Print Image Properties

There are copious amounts of extra data associated with images (metadata), beyond the actual image pixels. This metadata can be useful, either for display, or for various calculations, or in modifying the behavior of later image processing operations. You can utilize percent escapes in a number of options, for example in -format or in montage -label, to print various properties and other settings

[lordnoesis]

identifyとかで使う。

[nilab]

ImageMagick: Format and Print Image Properties