Method and apparatus for locating the boundary of an object
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United States of America Patent
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Aug 27, 1985
Issued Date -
N/A
app pub date -
Feb 28, 1983
filing date -
Dec 4, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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 representation. 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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