There is no way other than to a computer, unless the photo were on a SD card instead of on the phone itself then you "may" be able to place the SD card into another phone and get them that way. BUT if it says to format or do anything at all to the card when you plug it into the new device, "don't". Any changes to the card would wipe the data on it.
In the end, the best and simplest way is to transfer to a computer and then to another device.