ตัวแปลงไฟล์ออนไลน์ฟรี G4 เป็น SNB

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).

Is a format developed for the Shanda Bambook e-books, and is exclusive to those devices. Certain e-books produced by other companies can also view documents of this type. Shanda released its latest device in 2011 which is why this format is not widely used at present.