Crop and shrink using xv and izoom

• Run xv capture.rgb
• When xv is running, hit the 'I' key to get size info
• Use the mouse to drag out a square selection (in the info window you can see the size of the selection)
• when your selection is square (say 300x300, it doesn't have to be 200x200 now)(you can also resize using Shift+arrow keys, and move using the arrow keys), click the right mouse button in the image
• in the menu you get, click "Crop"
• click "Save", and save the image in the IRIS RGB format, under a different name (e.g. square.rgb)

Then the shrink:

% izoom square.rgb me.rgb 0.667 0.667 -m

Also note that the 0.667 0.667 above are there because in our example the square we selected was 300x300.

If you couldn't find the izoom program, either you're not running on a Silicon Graphics or you don't have /usr/sbin in your path.

Next, convert the result to a GIF image. Initially this web page told you to use togif for this, but this gives bad results. Instead, run xv again:

% xv me.rgb

Right-click in the image, choose "Save", change the format to GIF and make sure that "Colors:" (right below "Format:") says "Full Color", then click Ok.