I use to write my own opencv program to stack a set of images for viewing, e.g. rectification results of multiple images. But today I want to give ImageMagick a try. I searched on-line, and find many extremely useful features of ImageMagick. To stack a set of images, I could use ‘convert’ command with option ‘+/-append’. I could also ‘montage’. Some examples go follows:

  montage -label Balloon   balloon.gif  \
       -label Medical   medical.gif  \
       \( present.gif  -set label Present  \) \
       \( shading.gif  -set label Shading  \) \
       -tile x1  -frame 5  -geometry '60x60+2+2>' \
       -title 'My Images'     titled.jpg

or

 montage -font Times-New-Roman -pointsize 24 \
       -label (a) F28_IMG_0001.ppm \
       -label (b) F28_IMG_0002.ppm \
       -label (c) F28_x.ppm \
       -tile x1 -geometry +10+10 titled.jpg 

These commands are really cool. I don’t need Illustrator anymore for preparing my paper figures. http://www.imagemagick.org/Usage/montage/