Description:

Canon's digital cameras can all be remote-controlled by a PC via
USB. The camera comes only with Windows software for that. To
remote-capture with free software, you can use this utility. It is
based on libptp and does not only capture but also gives access to all
camera settings and it opens a live viewfinder window on the PC
screen.

The tool is command-line based, either for doing actions with shell
commands (out of scripts for example) or in an interactive command
mode (start "capture" without arguments and on the "capture>" prompt,
type "help" to know the commands and its arguments.

Should work with all compact digital cameras from Canon, most probably
does not work with all Canon EOS DSLRs. Tested with Canon PowerShot
A60, A70, S50, S60, S400 (Digital IXUS 400), they all work. Also
tested with the Canon EOS 300D (Digital Rebel), this camera does not
work (error on the "start" command). Note that you have to switch your
camera into PTP mode if it has an appropriate entry in its "Setup"
menu. If there is no such menu entry, the camera switches
automatically.