Method and apparatus for locating the boundary of an object

Details Method and apparatus for locating the boundary of an object Method and apparatus for locating the boundary of an object

H - Electricity

04

N

350/32, 354/72

H04N 7/18 (2006.01) G06T 9/20 (2006.01)

Patent

CA 1202115

-20- Abstract Method and Apparatus for Locating The Boundary of an Object An apparatus and method for automatically locating the boundary of an object in a field of view has a raster scan device to generate an electrical image of the field of view. The electrical image is segmented and digitized to form a first representation. The image is then processed by comparing the digitized signal to a pre-set threshold to form a second repre- sentation. A converter combines each value of the pixel of the second representation with the values of the adjacent pixels into a single value and stores it in a corresponding location in a third representation. The values of the pixels in the third representation are read out and compared to a look-up table. A chain code of the boundary of the particle is formed from the look-up table.

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