ตัวแปลงไฟล์ออนไลน์ฟรี G4 เป็น VIFF

G4 is a method to compress black and white images without losing quality. It is used for fax machines and as a one of the compression types for the TIFF format. G4 treats a picture as black dots and lines on a white page (less file size will be achieved if there are less black dots and lines).

This is a bitmap image format used in the VisiQuest Khoros visualization software suite. VIFF can be used to store bitmaps that are made up of color zones. It can store up to 2–3 color maps, and it is used to analyze visual data in research software.