Redotopography apparatus and method using moire fringe analysis

Details Redotopography apparatus and method using moire fringe analysis Redotopography apparatus and method using moire fringe analysis

1988-10-31

1991-06-18

Razavi, Michael

Image analysis

Histogram processing

For setting a threshold

382 4, 382 5, 33 3B, 356374, G06K 900

Patent

active

050254766

ABSTRACT:
A pedotopography apparatus which measures the shape of a foot by producing a moire fringe pattern representative of the underside of the foot, capturing and storing an image of the moire fringe pattern in an image storage buffer, analyzing the image to locate at least two points of interest on the foot and computing information corresponding to the distance between the two points. In the preferred embodiment the captured image is processed by Sobel convolution to enhance edges in the image. Both an apparatus and a method of processing are disclosed.

REFERENCES:
patent: 2009340 (1935-07-01), Edwards
patent: 3627427 (1971-12-01), Johnson et al.
patent: 4051483 (1977-09-01), Suzuki
patent: 4525858 (1985-06-01), Cline et al.
patent: 4538353 (1985-09-01), Gardner
patent: 4541113 (1985-09-01), Seufert et al.
patent: 4604807 (1986-08-01), Bock et al.
Gould, Nathaniel, M.D., Evaluation of Hyperpronation and Pes Planus in Adults, Clinical Orthopaedics and Related Research, vol. 181, pp. 37-45.
Drawing of pedotopography device used in clinical research.

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