Apparatus for and method of judging dotted image area

Details Apparatus for and method of judging dotted image area Apparatus for and method of judging dotted image area

1995-11-02

1998-03-17

Coles, Sr., Edward L.

Image analysis

Image segmentation

382176, 382273, 358453, 358462, H04N 1387, H04N 140

Patent

active

057296278

ABSTRACT:
An apparatus for and a method of judging a dotted image area using a small-capacity memory. Image data corresponding to one line out of image data representing an original image are stored in a line memory. On the line corresponding to the image data stored in the line memory, a target pixel is successively set along the main scanning direction. Image data corresponding to the target pixel is compared with image data corresponding to pixels around the target pixel. It is judged whether or not the target pixel is a peculiar point pixel on the basis of the result of the comparison. Further, the distance between peculiar point pixels is operated. The operated distance between the peculiar point pixels is referred to a predetermined judgment basis, to judge whether or not a judging area including the finite number of pixels is a dotted image area.

REFERENCES:
patent: 4547811 (1985-10-01), Ochi et al.
patent: 5418626 (1995-05-01), Semasa
patent: 5513282 (1996-04-01), Williams
patent: 5515180 (1996-05-01), Maeda et al.

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