Handwriting input apparatus
First Claim
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1. A handwriting input apparatus for processing handwritten input, comprising:
- input means for making a handwritten input;
a processor for processing said handwritten input, said processor representing said handwritten input using one or more of three primitive figures, said three primitive figures being a circle, a straight line segment, and a curving line segment;
display means, associated with said input means, for displaying said one or more primitive figures indicative of said handwritten input; and
discriminating means for defining a proximity area around each primitive figure displayed by said display means and for discriminating whether a predetermined amount of a subsequent handwritten input is within the proximity area of one or more displayed primitive figures;
wherein said one or more displayed primitive figures having a proximity area in which a predetermined amount of said subsequent handwritten input is made, as determined by said discriminating means, is entirely erased.
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Abstract
A handwriting input apparatus allows erasure of a displayed figure by a simple handwritten input. When all of a sequence of handwriting points H (indicated by black dots in the figure) composing a locus of a single stroke of handwritten input is located within a proximity area (shown by broken lines in the figure) of either primitive figure obj1 or obj2 currently being displayed, this stroke is recognized as specifying an erasure and the portions of the primitive figures obj1 and obj2 which correspond to the sequence of handwriting points H are accordingly erased.
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Citations
20 Claims
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1. A handwriting input apparatus for processing handwritten input, comprising:
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input means for making a handwritten input; a processor for processing said handwritten input, said processor representing said handwritten input using one or more of three primitive figures, said three primitive figures being a circle, a straight line segment, and a curving line segment; display means, associated with said input means, for displaying said one or more primitive figures indicative of said handwritten input; and discriminating means for defining a proximity area around each primitive figure displayed by said display means and for discriminating whether a predetermined amount of a subsequent handwritten input is within the proximity area of one or more displayed primitive figures; wherein said one or more displayed primitive figures having a proximity area in which a predetermined amount of said subsequent handwritten input is made, as determined by said discriminating means, is entirely erased. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A handwriting input method for processing handwritten input, comprising:
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making a handwritten input using input means; processing said handwritten input with a processor, said processor representing said handwritten input using one or more of three primitive figures, said three primitive figures being a circle, a straight line segment, and a curving line segment; displaying said one or more primitive figures indicative of said handwritten input with display means, associated with said input means; defining a proximity area around each primitive figure displayed by said display means; discriminating with discriminating means whether a predetermined amount of a subsequent handwritten input is within the proximity area of one or more displayed primitive figures; and erasing entirely said one or more displayed primitive figures having a proximity area in which a predetermined amount of said subsequent handwritten input is made. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification