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6. Memory management
Selecting the sensor architecture provides the user with a recording medium suited to his needs. Maximum frame rates can be selected, depending on the spatial resolution required. The images generated by the sensor are then transferred for storage in memory. Two types of memory are used in high-speed imaging: internal memory storage and external memory storage after transfer of the image area to an external storage medium. The amount of information to be transferred is directly proportional to the number of bits per pixel, the number of pixels per image... and the number of images per second. Some manufacturers speak in Mpix/s or Gpix/s, and the transfer speed is then obtained by multiplying this value by the weight of the pixel in bytes (1 byte = 8 bits; o in French, B in English).
Some manufacturers express transfer...
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Memory management
Latest developments
Bibliography
Websites
UNIT (Université numérique en ingénierie et technologie), OPI (optique pour l'ingénieur) course "M7G4 Fundamentals of image sensors", http://optique-ingenieur.org/fr/cours/OPI_fr_M05_C06/co/OPI_fr_M05_C06_web.html SD association (page consulted March 2015)
Linkemann...
Standards and norms
- Standard for Characterization of Image, Sensors and Cameras, Release 3.0, Issued by European Machine Vision Association. - EMVA Standard 1288 - Nov 29, 2010
- Photography – Digital still cameras – Determination of exposure index, ISO speed ratings, standard output sensitivity, and recommended exposure index. - ISO 12232 - 2006
Patents
YAMADA, Shigeru, TSUJI, Masataka, and MITSUI, Kenji. High speed imaging apparatus. U.S. Patent N° 5, 412, 422, May 2, 1995.
ACIU, Alexandru V., POP, Petru, and CORLAN, Radu. High-frame rate image acquisition and motion analysis system. U.S. Patent N° 5, 625, 412, Apr. 29, 1997.
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Photron (Europe) Limited, United Kingdom :
NAC, Japan :
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