Pattern selecting device capable of selecting favorable candidate patterns
First Claim
1. A pattern selecting device for producing an output numeral indicative of one of first through N-th candidate patterns which have first through N-th candidate degrees of similarity relative to an input pattern and are decided by a pattern collating system for collating said input pattern with a plurality of registered patterns to produce, successively in a descending order of said first through said N-th candidate degrees, first through N-th candidate pattern signals representative of said first through said N-th candidate patterns, where N represents an integer which is not less than two and is not greater than said plurality, said pattern selecting device comprising:
- processing means for processing said first through said N-th candidate pattern signals to produce, when an (n+1)-th candidate pattern signal is processed, where n is variable from 1 towards N, an n-th processed signal related to said (n+1)-th through said N-th candidate degrees;
estimating means connected to said processing means for estimating an n-th estimated degree for an n-th candidate pattern with reference to said processed signal to produce an estimated signal representative of said n-th estimated degree; and
deciding means connected to said processing means and said estimating means for deciding whether or not a ratio of said n-th estimated degree to said n-th candidate degree is not smaller than a predetermined value, said deciding means thereby producing a numeral indicative of said n-th candidate pattern as said output numeral.
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Abstract
In a pattern selecting device for use in combination with a pattern collating device for collating an input pattern with a plurality of registered patterns to produce first through N-th candidate pattern signals indicative of first through N-th candidate patterns which have first through N-th candidate degrees of similarity relative to the input pattern, where N represents an integer which is not less than two and is not greater than the number of the registered patterns, a processing unit processes (n+1)-th through the N-th candidate pattern signals and produces an approximation signal representative of an approximation variable related to (n+1)-th through the N-th candidate degrees, where n is variable from 1 toward N. An estimating unit estimates an n-th estimated degree for an n-th candidate pattern with reference to the approximation variable to produce an estimated signal representative of the n-th estimated degree. A deciding unit decides whether or not a ratio of the n-th estimated degree to the n-th candidate degree is not smaller than a predetermined value and produces an output numeral representative of n-th candidate pattern when the ratio is not smaller than the predetermined value. Instead of the ratio, it is possible to use a weighted mean value of the n-th candidate degree and the ratio of the n-th estimated degree to the n-th candidate degree.
44 Citations
8 Claims
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1. A pattern selecting device for producing an output numeral indicative of one of first through N-th candidate patterns which have first through N-th candidate degrees of similarity relative to an input pattern and are decided by a pattern collating system for collating said input pattern with a plurality of registered patterns to produce, successively in a descending order of said first through said N-th candidate degrees, first through N-th candidate pattern signals representative of said first through said N-th candidate patterns, where N represents an integer which is not less than two and is not greater than said plurality, said pattern selecting device comprising:
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processing means for processing said first through said N-th candidate pattern signals to produce, when an (n+1)-th candidate pattern signal is processed, where n is variable from 1 towards N, an n-th processed signal related to said (n+1)-th through said N-th candidate degrees; estimating means connected to said processing means for estimating an n-th estimated degree for an n-th candidate pattern with reference to said processed signal to produce an estimated signal representative of said n-th estimated degree; and deciding means connected to said processing means and said estimating means for deciding whether or not a ratio of said n-th estimated degree to said n-th candidate degree is not smaller than a predetermined value, said deciding means thereby producing a numeral indicative of said n-th candidate pattern as said output numeral. - View Dependent Claims (2, 3)
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4. A pattern selecting device for producing an output numeral indicative of one of first through N-th candidate patterns which have first through N-th candidate degrees of similarity relative to an input pattern and are decided by a pattern collating system for collating said input pattern with a plurality of registered patterns to produce, successively in a descending order of said first through said N-th candidate degrees, first through N-th candidate pattern signals representative of said first through said N-th candidate patterns, where N represents an integer which is not less than two and is not greater than said plurality, said pattern selecting device comprising:
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processing means for processing said first through said N-th candidate pattern signals to produce, when an (n+1)-th candidate pattern signal is processed, where n is variable from 1 towards N, an n-th processed signal related to said (n+1)-th through said N-th candidate degrees; estimating means connected to said processing means for estimating an n-th estimated degree for an n-th candidate pattern with reference to said processed signal to produce an estimated signal representative of said n-th estimated degree; and deciding means connected to said processing means and said estimating means for deciding whether or not a weighted mean value of said n-th candidate degree and a ratio of said n-th estimated degree to said n-th candidate degree is not smaller than a predetermined value, said deciding means thereby producing a numeral indicative of said n-th candidate pattern as said output numeral. - View Dependent Claims (5, 6, 7, 8)
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Specification