Method and apparatus for assigning temporary and true labels to

Details Method and apparatus for assigning temporary and true labels to Method and apparatus for assigning temporary and true labels to

1997-08-29

1999-08-10

Boudreau, Leo H.

Image analysis

Image segmentation

Region labeling

382176, G06K 900

Patent

active

059370912

ABSTRACT:
A method and apparatus for assigning a temporary label to each connected area in an image by scanning the image by using a window which has a size of two pixels in the vertical direction and of a plurality of pixels in the horizontal direction. A set of values of pixels contained in the above window is obtained and one of predetermined temporary label assignment rules corresponding to the obtained set of pixel values is selected. A temporary label is assigned to each pixel contained in the window, based on the above one of the temporary label assignment rules determined as above, and based on temporary labels of pixels in the second group in the window at the above each location. In addition, the temporary labels are converted to true labels, by scanning the image pixel within the at least one circumscribing area only, where each circumscribing area is predetermined so that the at least one circumscribing area contains all pixels which do not belong to a background area in the image.

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patent: 4847786 (1989-07-01), Wang et al.
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patent: 5073953 (1991-12-01), Westdijk
patent: 5199083 (1993-03-01), Takeda
patent: 5305393 (1994-04-01), Kawai et al.

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