The evolution of the DIGIC image processor has been the result of an ongoing search for higher and higher levels of image quality and faster speeds. DIGIC 4, which Canon began using in its camera products in the fall of 2008, represents the sixth generation of DIGIC processors. Compared with first-generation DIGIC processors, device performance has improved 50-fold in the space of just 10 years.
Today’s DIGIC image processor does more than mere image processing: It controls a wide range of functions and circuits, including automatic exposure control, exposure mode control, image file compression/playback control, LCD display control, and more. All of these functions are contained in a single-chip system large-scale integrated circuit (LSI), and the same image-processing platform can be used in any Canon digital camera, including the Digital ELPH/IXUS and PowerShot series of compact digital cameras, and the EOS digital SLR (single-lens reflex) camera series.
One could say that DIGIC is the “brain” of Canon digital cameras. DIGIC 4, the latest version of the DIGIC digital image processor, provides dramatic improvements in terms of image quality and processing speed. So how have these advances in processor design been achieved? We talked to four members of the DIGIC 4 development team to find out more.