For PBM images, specify image type pbm. Color, gray-scale and
monochromatic images are supported. For mono PBM images, two additional
image properties are supported.
:foreground foregroundnil for the default color. This color is
used for each pixel in the PBM that is 1. The default is the frame's
foreground color.
:background backgroundnil for the default color. This color is
used for each pixel in the PBM that is 0. The default is the frame's
background color.
For JPEG images, specify image type jpeg.
For TIFF images, specify image type tiff.
For PNG images, specify image type png.
For SVG images, specify image type svg.