Software that lets you save an image as a *.png file.
This same technique will work for *.jpg and *.gif (in JDK (Java Development Kit)
1.6+). For a fuller example of creating a transparent
PNG (Portable Network Graphics) file from scratch and saving it to disk see Masker. See the source code for
Cropper to see how to load,
crop, scale and save a *.png file.