Method and apparatus for producing binary picture with detection and retention of plural binary picture blocks having a thin line pattern including an oblique line
First Claim
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1. A binary picture reducing method comprising:
- a first step of dividing an original picture into blocks each having a pattern matrix composed of a predetermined number of picture elements for extracting a plurality of binary picture blocks;
a second step wherein, when individual blocks of the plurality of binary picture blocks each agree with a predetermined thin line pattern including an oblique line, detecting each individual binary picture block as a thin line block; and
a third step wherein each thin line block detected is retained on an output picture at a position corresponding to a predetermined reduction ratio.
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Abstract
Binary picture reducing method and apparatus are disclosed, wherein an original picture is divided for a block of a pattern matrix composed of a predetermined number of picture elements, thereby extracting a plurality of binary picture blocks. When the plurality of binary picture blocks each agree with a predetermined thin line pattern, the binary picture block is detected as a thin line block. The thin line block thus detected is retained on an output picture at a position corresponding to a predetermined reduction ratio.
103 Citations
2 Claims
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1. A binary picture reducing method comprising:
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a first step of dividing an original picture into blocks each having a pattern matrix composed of a predetermined number of picture elements for extracting a plurality of binary picture blocks; a second step wherein, when individual blocks of the plurality of binary picture blocks each agree with a predetermined thin line pattern including an oblique line, detecting each individual binary picture block as a thin line block; and a third step wherein each thin line block detected is retained on an output picture at a position corresponding to a predetermined reduction ratio.
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2. A binary picture reducing apparatus comprising:
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blocking means for dividing an original picture into a plurality of blocks each of a pattern matrix composed of a predetermined number of picture elements to extract the blocks as binary picture blocks; decision means for detecting, when the plurality of binary picture blocks each agree with a predetermined thin line pattern including an oblique line, each binary picture block as a thin line block; and retaining means for retaining each thin line block detected on an output picture at a position corresponding to a predetermined reduction ratio.
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Specification