Photometric device

Details Photometric device Photometric device

1988-10-27

1990-10-09

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358163, 358168, 358169, 358903, H04N 1700

Patent

active

049624253

ABSTRACT:
The equipment and calibration of a luminance and image analysis device is ovided for acquiring and interpreting calibrated images. The device is comprised of a solid state video camera with V-lambda (photopic) correction filter for acquiring light (luminance) and spatial information from a scene and a personal computer with image capture board for storing and analyzing these data. From the acquired spatial-luminance information the software may, for example, predict Relative Visual Performance, or RVP. Essentially, the RVP is computed on the basis of three stimulus variables contained in a captured image; the age dependent adaptation luminance and apparent contrast of the target against its background, and the apparent size of the target. The device is not limited to assessments of RVP, but can acquire and process images according to any set of algorithms where light (luminance) and size information is required. The device is capable of providing information for almost every vision algorithm. The two essential functions of the device, are image acquisition and image processing.

REFERENCES:
patent: 4862265 (1989-08-01), Bartow

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