Photodetector array based image analysis apparatus

Details Photodetector array based image analysis apparatus Photodetector array based image analysis apparatus

1995-07-07

1997-02-11

Razavi, Michael T.

Image analysis

Applications

348189, G06K 900

Patent

active

056029322

ABSTRACT:
Image analysis apparatus comprises a two dimensional array of photodetectors (80) for receiving light from pixels of a display screen (90). The intensity values generated by the photodetectors (80) in response to incident light from the pixels are stored in a memory (40). The photodetectors' spatial geometry is mapped onto the display screen's known pixel geometry. A processor (50) determines one or more performance parameters of the display screen (90) as a function of the intensity values stored in the memory (40) and of the photodetectors mapped spatial geometry (80). Calibration and correlation problems associated with prior art measurement techniques are avoided by mapping the spacing of the array of photodetectors onto the known geometry of the display pixel structure. Also, the apparatus can be conveniently incorporated into a handset and therefore does not require complicated positioning jigs in use.

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