matshow can display any image type as well as .mat image files. It can also display weights contained in a network weights file (see '-conf' option). User can zoom, pan, show multiple images at once, display image informations and change display range (see controls section).

• matshow <file(s)> [options]

• Display all .mat images in current directory:

  matshow *.mat

• Display all .jpg images in current directory:

  matshow *.jpg

• Display all network weight in current directory which structure is defined in 'best.conf' configuration file, zooming on weights slices with a factor of 2.0, displaying them from the -1.5,1.5 range:

  matshow *.mat -conf best.conf -zoom 2.0 -range -1.5,1.5

• pan: left-click and move mouse around to pan the image.
• zoom: use mouse wheel to zoom in and out.
• multiple images: multiple images can be shown at the same time using x or z keys to show more or less images horizontally, or y and t keys vertically.
• previous/next: user can show images back and forth using left/right or backspace/space keys.
• image information: display image informations such as size by pressing i.
• help: key controls can be shown by pressing h.
• autorange: enable/disable automatic input range by pressing a. Automatic range will map the minimum and maximum input range to the 0,255 display extrema.
• CTRL+{0,1,2,3}: shows different images channels, 0 for RGB, 1 for R only, 2 for G only and 3 for B only.

• Show a trained network's weights:

  -conf <filename>

• Zoom on weights by this factor:

  -zoom <factor>

• Input range to map to display range (0 - 255):

  -range <range, e.g.: -1,1>

• Display and save all input images in a video_<timestamp> directory, than can later be compile into a video:

  -video