Image processing apparatus and method

Details Image processing apparatus and method Image processing apparatus and method

1995-09-05

1998-05-05

Couso, Yon

Image analysis

Pattern recognition

Feature extraction

382170, G06K 900, G06K 948

Patent

active

057487782

ABSTRACT:
An image processing apparatus of the present invention extracts a boundary point between a white pixel area and a black pixel area on a binary image. In the image processing apparatus, a scan line set section sets a scan line on the binary image. A cumulative histogram creation section examines each pixel on the scan line and creates a cumulative histogram, a predetemined value being added whenever one of a black pixel and a white pixel is extracted, corresponding to pixel position of the scan line. A boundary point extraction section extracts a point from the binary image corresponding to a point on the histogram where the display moves from a relatively flat part to a monotone increasing part and determines the pixel position corresponding to the extracted point on the scan line as a boundary point which indicates a transition from one pixel area to the other pixel area.

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patent: 5150433 (1992-09-01), Daly
patent: 5321770 (1994-06-01), Huttenlocher et al.
patent: 5436978 (1995-07-01), Kasdan
M. Kas et al., "Snakes: Active Contour Models", IEEE, pp. 259-268 (1987).

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