초록 ▼

An image correcting method and apparatus is disclosed in which processing other than a smoothing process can be performed in accordance with conditions of a line such as correction of a line width with a small circuit size and at low cost. The disclosed dot image correcting method stores correction

An image correcting method and apparatus is disclosed in which processing other than a smoothing process can be performed in accordance with conditions of a line such as correction of a line width with a small circuit size and at low cost. The disclosed dot image correcting method stores correction data corresponding to a correction dot pattern(s) in a window(s), determines whether or not a dot pattern coincides with a correction dot pattern, and when coincidence is detected, performs correction in accordance with corresponding correction data, characterized in that there are a plurality of windows, and correction data are stored corresponding to a combination of correction dot patterns in various windows, and determination is made as to whether or not dot patterns in a plurality of windows coincide with a combination of correction dot patterns in various windows, and when coincidence is detected, correction is performed in accordance with corresponding correction data.

대표청구항 ▼

1. A dot image correcting method comprising the steps of:storing correction data corresponding to a correction dot pattern in a window;determining whether or not a dot pattern in a window of a dot image coincides with said correction dot pattern; andperforming correction, when coincidence is detecte

1. A dot image correcting method comprising the steps of:storing correction data corresponding to a correction dot pattern in a window;determining whether or not a dot pattern in a window of a dot image coincides with said correction dot pattern; andperforming correction, when coincidence is detected, in accordance with said corresponding correction data;wherein there are a plurality of said windows and said correction data are stored corresponding to a combination of correction dot patterns of various windows;and wherein it is determined whether or not dot patterns in said plurality of windows coincide with a combination of correction dot patterns of various windows, and, if coincidence is detected, correction is performed in accordance with said corresponding correction data. 2. A dot image correcting method according to claim 1, wherein each of said plurality of windows includes an observation dot and said correction data are data for correcting said observation dot. 3. A dot image correcting method according to claim 2, wherein said plurality of windows are moved on said dot image such that said observation dot scans said dot image, and it is determined whether or not the dot patterns in said windows coincide with said correction dot patterns. 4. A dot image correcting method according to claim 2, wherein said plurality of windows includes:two windows of 1 dot in width including said observation dot and extending in the horizontal direction and in the vertical direction, respectively; andtwo windows of 1 dot in width including said observation dot and extending in each of two directions inclined at 45° relative to said horizontal direction, respectively. 5. A dot image correcting method according to claim 2, wherein one of said plurality of windows includes:two dot-lines including said observation dot and extending in the horizontal direction and in the vertical direction, and two dot-lines including said observation dot and extending in two directions inclined at 45° relative to said horizontal direction. 6. A dot image correcting apparatus comprising:a correction data storage circuit that stores correction data corresponding to a correction dot pattern in a window;a pattern coincidence detection circuit that detects whether or not a dot pattern in a window of a dot image coincides with said correction dot pattern; anda correction signal generating circuit that performs correction, when coincidence is detected, in accordance with said corresponding correction data;wherein there are a plurality of said windows and said correction data storage circuit stores said correction data corresponding to a combination of correction dot patterns of various windows;and wherein said pattern coincidence detection circuit includes a plurality of pattern coincidence detection circuits that detect whether or not dot patterns in said plurality of windows coincide with a combination of correction dot patterns of various windows. 7. A dot image correcting apparatus according to claim 6, wherein each of said plurality of windows includes a common observation dot and said correction data are data for correcting said observation dot. 8. A dot image correcting apparatus according to claim 7, further comprising:a line buffer that temporarily stores image data of said dot image in a wider range than the width of said windows; anda window register that supplies said dot pattern in said window register to said plurality of pattern coincidence detection circuits such that said observation dot scans said dot image. 9. A dot image correcting apparatus according to claim 7, wherein said plurality of windows includes:two windows of 1 dot in width including said observation dot and extending in the horizontal direction and in the vertical direction; andtwo windows of 1 dot in width including said observation dot and extending in directions inclined at 45° relative to said horizontal direction. 10. A dot image correcting apparatus according to claim 7, wherein one of said plurality of windows includes:two dot lines including said observation dot and extending in the horizontal direction and in the vertical direction, and two dot lines including said observation dot and extending in two directions inclined at 45° relative to said horizontal direction.