Many of today’s digital cameras use memory devices such as SD, MiniSD, XD, CompactFlash, SmartMedia, Sony Memory Stick, and MMC cards to store captured image data. These devices store the data on a memory chip contained within them. A camera memory card is little different to a hard disk drive or memory stick with regards to the way that the operating system stores and retrieves data from it. As with these other devices, the same principles apply for file and data recovery in this case too.
In order to have the best chance of a successful image file or data recovery, do not save any more images or files to the device. In most cases, all or most of the image data is still contained on the memory card. You stand a good chance of being able to recover the deleted file until new data (a new picture) is saved onto the card at which point the likelihood of being able to perform successful file and data recovery diminishes.
Further information on how to recover deleted file(s) from a digital camera or memory card is provided at recover deleted photos.