well first one would have to upload the images to the computer. I depends on your phone model how this is possible. One way, is if you can send image text messages to your email. Other phones let you connect via usb cable and upload the pictures directly to your harddrive. I suggest reading your phone manual if you do not know what to do or read about it on the webpage for your model.
Good luck, and remember, certain types of cell phones work differntly from others.