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The ImageMagick module can support files with the following MIME types:

image/gif
image/jpeg
image/pjpeg
image/jp2
image/jpg2
image/jpx
image/png
image/tiff
image/svg+xml
image/bmp
application/pdf
application/postscript
application/photoshop
image/x-photo-cd
image/tga
image/jpeg-cmyk
image/tiff-cmyk
application/photoshop-cmyk