A vision chip is an integrated circuit having both image sensing circuitry and image processing circuitry on the same die. The image sensing circuitry may be implemented using charge-coupled devices, active pixel sensor circuits, or any other light sensing mechanism. The image processing circuitry may be implemented using analog, digital, or mixed signal (analog and digital) circuitry. One area of research is the use of neuromorphic engineering techniques to implement processing circuits inspired by biological neural systems. The output of a vision chip is generally a partially processed image or a high-level information signal revealing something about the observed scene. Although there is no standard definition of a vision chip, the processing performed may comprise anything from processing individual pixel values to performing complex image processing functions and outputting a single value or yes/no signal based on the scene.
Types of processing performed in a vision chipedit
There is no standard definition of what constitutes a vision chip and thus the type of circuitry that may be performed. Below is a sample list of processing steps reported in vision chip designs, as reported in several books.:[1][2][3][4]
The overwhelming majority of vision chip designs were executed largely by academic institutions as part of research projects. However several designs have, at one point or another, been commercialized as a product.
Optical mouse sensor: The sensor chip used in an optical mouse is a vision chip.
Vision processing unit, a class of processor for accelerating machine vision, possibly including camera interfaces, but not directly including photosensitive elements
Referencesedit
^Analog VLSI and Neural Systems, by Carver Mead, 1989
^Vision Chips: Implementing Vision Algorithms With Analog Vlsi Circuits, Ed. by Koch and Li, IEEE, 1995
^Analog VLSI Circuits for the Perception of Visual Motion, by Alan Stocker, Wiley and Sons, 2006
^Vision Chips, by Alireza Moini, Kluwer Academic Publishers, 2000
^E. Funatsu, K. Hara, T. Toyoda, J. Ohta & K. Kyuma, Variable-sensitivity photodetector of pn-np structure for optical neural networks, Japanese Journal of Applied Physics, Part 2 (Letters), Vol. 33, No. 1B, pp. L113-L115, January 1994.
vision, chip, vision, chip, integrated, circuit, having, both, image, sensing, circuitry, image, processing, circuitry, same, image, sensing, circuitry, implemented, using, charge, coupled, devices, active, pixel, sensor, circuits, other, light, sensing, mecha. A vision chip is an integrated circuit having both image sensing circuitry and image processing circuitry on the same die The image sensing circuitry may be implemented using charge coupled devices active pixel sensor circuits or any other light sensing mechanism The image processing circuitry may be implemented using analog digital or mixed signal analog and digital circuitry One area of research is the use of neuromorphic engineering techniques to implement processing circuits inspired by biological neural systems The output of a vision chip is generally a partially processed image or a high level information signal revealing something about the observed scene Although there is no standard definition of a vision chip the processing performed may comprise anything from processing individual pixel values to performing complex image processing functions and outputting a single value or yes no signal based on the scene Contents 1 Types of processing performed in a vision chip 1 1 Light sensing techniques 1 2 Spatial processing techniques 1 3 Temporal processing techniques 1 4 Other techniques 2 Commercially available vision chips 3 See also 4 References 5 External linksTypes of processing performed in a vision chip editThere is no standard definition of what constitutes a vision chip and thus the type of circuitry that may be performed Below is a sample list of processing steps reported in vision chip designs as reported in several books 1 2 3 4 Light sensing techniques edit Active pixel sensors APS Charge coupled devices Logarithmic compression pixels Microbolometers for thermal imagingSpatial processing techniques edit Lateral inhibition Artificial silicon retina circuits Contrast enhancement Edge or other static feature detectionTemporal processing techniques edit Intensity change detection Detection of visual motion optical flowOther techniques edit Cellular nonlinear networksCommercially available vision chips editThe overwhelming majority of vision chip designs were executed largely by academic institutions as part of research projects However several designs have at one point or another been commercialized as a product Optical mouse sensor The sensor chip used in an optical mouse is a vision chip Mitsubishi silicon retina chip 5 See also editOptical flow sensor Active pixel sensor Charge coupled device Neuromorphic engineering Vision processing unit a class of processor for accelerating machine vision possibly including camera interfaces but not directly including photosensitive elementsReferences edit Analog VLSI and Neural Systems by Carver Mead 1989 Vision Chips Implementing Vision Algorithms With Analog Vlsi Circuits Ed by Koch and Li IEEE 1995 Analog VLSI Circuits for the Perception of Visual Motion by Alan Stocker Wiley and Sons 2006 Vision Chips by Alireza Moini Kluwer Academic Publishers 2000 E Funatsu K Hara T Toyoda J Ohta amp K Kyuma Variable sensitivity photodetector of pn np structure for optical neural networks Japanese Journal of Applied Physics Part 2 Letters Vol 33 No 1B pp L113 L115 January 1994 External links edithttp www iee et tu dresden de iee analog papers mirror visionchips Retrieved from https en wikipedia org w index php title Vision chip amp oldid 1126857065, wikipedia, wiki, book, books, library,
