professional digital photography application, Aperture. Starting with Mac OS X 10.5, any application that implements Image Kit can utilize Core Image. Preview and iPhoto are common examples. In 2011, Apple added Core Image to iOS in iOS 5.0. The Xcode Tools include Core Image Fun House and Quartz Composer; both utilize Core Image. Pixel accuracy All pixel processing provided by an Image Unit is performed in a pre-multiplied alpha (RGBA) color space, storing four color channels: red, green, blue, and transparency (alpha). Each color channel is represented by a 32-bit, floating point number. This provides exceptional color depth, far greater than can be perceived by the human eye, as each pixel is represented by a 128-bit vector (four 32-bit color channels). For color spaces of lower bit-depth, the floating-point calculation model employed by Core Image provides exceptional performance, which is useful when processing multiple images or video frames. Supported graphics processors Any programmable GPU that supports the required OpenGL Shader (GLSL) commands is Core Image capable. Apple has used the following graphics cards to support Core Image GPU processing in Mac OS X 10.4 and Aperture, so the following list could be considered an example of minimum requirements: ATI Mobility Radeon 9700 (Mobility Radeon 9600 is also capable) ATI Radeon 9550, 9600, 9650, 9600 XT, 9600 Pro, 9700 Pro, 9800 XT, and 9800 Pro ATI Radeon X600 XT, X600 Pro, X800 XT, X850 XT, X1600, X1900 XT ATI Radeon HD 2400 XT, HD 2600 Pro, and HD 2600 XT NVIDIA GeForce FX 5200 Ultra, FX Go 5200 NVIDIA GeForce 6600, 6600 LE, 6800 Ultra DDL, and 6800 GT DDL NVIDIA GeForce 7300 GT, 7600 GT, and 7800 GT NVIDIA GeForce 8600M GT & 8800 GT NVIDIA GeForce 9400M & 9600M GT NVIDIA GeForce GT 120 & GT 130 NVIDIA GeForce GTX 285 NVIDIA Quadro FX 4500 & FX 5600 NVIDIA Quadro FX 4800 NVIDIA Quadro 4000 NVIDIA GeForce 320M NVIDIA GeForce GT 330M NVIDIA GeForce GT 640M NVIDIA GeForce GT 650M NVIDIA GeForce GTX 660M NVIDIA GeForce GTX 675M NVIDIA GeForce GTX 680MX NVIDIA GeForce GT 750M NVIDIA GeForce GT 755M NVIDIA GeForce GTX 775M NVIDIA GeForce GTX 780M Intel GMA 900, GMA 950, or GMA X3100 Intel HD Graphics 3000(Sandy Bridge) Intel HD Graphics 4000(Ivy Bridge) Intel HD Graphics 5000(Haswell) Intel Iris 5100(Haswell) Intel Iris Pro 5200(Haswell) Intel HD Graphics 5300(Broadwell) Intel HD Graphics 6000(Broadwell) Intel Iris 6100(Broadwell) Note