There are basically two methods used to send pictures over ham radio. A single transmission is wider than the entire 2 meter ham band. Early pictures were low resolution black and white. Now nearly all images are higher resolution color.
Most users use images from the internet etc.
Fontana software website for Roy 1 SSTV program. Dave KB4YZ's site with excellent lists of SSTV links. CombiTech's website for Mscan SSTV program. KA1LPA's website for SSTV32 and WinSKan. Don K0HEO's website for WinPix 32.