The G3 format is used to compress image files in TIFF format when sending faxes. The compression algorithm allows for the use of a standard 10-times compression, which can be increased. It is used to remove excess image data, which makes it possible to reduce the size of the image and speed up delivery.
This format was developed by Kodak in order to store images on optical or other media. It is used as a format for archiving scanned documents on Kodak devices. It encodes images in 24-bit color and supports resolutions of up to 6144x4096 pixels.