- published: 08 May 2015
- views: 678
The Nikon Expeed image processing engines (often styled EXPEED) are signal processors for Nikon's digital cameras. They perform a high number of tasks: Bayer filtering, demosaicing, image sensor corrections/dark-frame subtraction, image noise reduction, image sharpening, image scaling, gamma correction, image enhancement/Active D-Lighting, colorspace conversion, chroma subsampling, framerate conversion, lens distortion/chromatic aberration correction, image compression/JPEG encoding, video compression, display/video interface driving, digital image editing, face detection, audio processing/compression/encoding and computer data storage/data transmission.
The used multi-processor system on a chip solution integrates an image processor in multi-core processor architecture, with even each single processor-core able to compute many instructions/operations in parallel. Storage- and display-interfaces and other modules are added and a digital signal processor (DSP) increases the number of simultaneous computations. An on-chip 32-bit microcontroller initiates and controls the operation and data transfers of all processors, modules and interfaces and can be seen as the main control unit of the camera. The Expeed is an application-specific integrated circuit (ASIC) built by Fujitsu specifically for Nikon designs according to Nikon specifications.