Pattern recognizing system

Claim 2

A pattern recognizing system comprising: first quantizing means for converting an unknown pattern to be recognized into a first signal corresponding to a first number of picture elements; second quantizing means for converting the same unknown pattern into a second signal corresponding to a second number of picture elements, said second number of the picture elements in the second signal being less than said first number of the picture elements in the first signal; first storage means for storing signals representing a plurality of classifying reference patterns; classifying meanS for comparing the second signal from said second quantizing means with each of the signals of the classifying reference patterns from said first storage means, including selecting means for selecting at least one pattern from among the classifying reference patterns as a probable pattern; second storage means for storing signals representing a plurality of discriminating reference patterns; and discriminating means for comparing the first signal from said first quantizing means with each of the signals of the discriminating reference patterns from said second storage means belonging to the probable classifying reference pattern selected by said classifying means, thereby carrying out the discrimination of the unknown pattern.

Claim 3

A pattern recognizing system according to claim 1, in which said second quantizing means comprises register means for storing the first signal from said first quantizing means, compressor means for compressing successively a plurality of picture elements constituting the first signal into a single element and converter means for converting the single element compressed by said compressing means into the quantized second signal.

Claim 4

A pattern recognizing system according to claim 1, in which said classifying means comprises calculating means for calculating the deviations between the second signal from said second quantizing means and each of signals of the classifying reference patterns from said first storage means and detecting means for selecting the classifying reference pattern which indicates the minimum value among the deviations obtained by said calculating means.

Claim 5

A pattern recognizing system according to claim 1, in which said discriminating means comprises calculating means for calculating the deviations between the first signal from said first quantizing means and each of the signals of the discriminating reference patterns belonging to the probably classifying reference pattern selected by said classifying means and detecting means for selecting the discriminating pattern which indicates the minimum value among the deviations obtained by said calculating means.

Claim 6

A pattern recognizing system comprising: first, second, third and fourth quantizing means for converting an unknown pattern to be recognized into first, second, third and fourth quantized signals each corresponding to a number of picture elements, respectively, the numbers of the picture elements of the first, second, third and fourth quantized signals, X1, X2, X3 and X4 being related as X1<X2<X3<X4; first, second and third storage means for storing signals corresponding to first, second and third classifying reference patterns, respectively; fourth storage means for storing signals corresponding to discriminating reference patterns; first classifying means for comparing the first quantized signal from said first quantizing means with each of signals of the first classifying reference patterns from said first storage means and selecting at least one pattern from among the first classifying reference patterns; second classifying means for comparing the second quantized signal from said second quantizing means with each of signals of the second classifying reference patterns from said second storage means, belonging to the first classifying reference pattern selected by said first classifying means and selected at least one pattern from among the second classifying reference patterns; third classifying means for comparing the third quantized signal from said third quantizing means with each of signals of the third classifying reference patterns from said third storage means, belonging to the second classifying pattern selected by said second classifying means and selecting at least one pattern from among the third classifying reference patterns; and discriminating means for comparing the fourth quantized signal from said fourth quantizing means with eAch of signals of the classifying reference patterns from said fourth storage means, belonging to the third classifying pattern selected by said third classifying means and selecting a pattern from among the fourth classifying reference patterns, thereby carrying out the discrimination of the unknown pattern.

Claim 7

A pattern recognizing system comprising: first, second, third and fourth quantizing means for converting an unknown pattern to be recognized into first, second, third and fourth quantized signals each corresponding to a number of picture elements, respectively, the numbers of the picture elements of the first, second, third and fourth quantized signals, X1, X2, X3 and X4 being related as X1<X2<X3<X4; first, second and third storage means for storing signals corresponding to first, second and third classifying reference patterns, respectively; fourth storage means for storing signals corresponding to discriminating reference patterns; first classifying means for comparing the first quantized signal from said first quantizing means with each of signals of the first classifying reference patterns from said first storage means and selecting at least one pattern from among the first classifying reference patterns; second classifying means for comparing the second quantized signal from said second quantizing means with each of signals of the second classifying reference patterns from said second storage means, belonging to the first classifying reference pattern selected by said first classifying means and selected at least one pattern from among the second classifying reference patterns; third classifying means for comparing the third quantized signal from said third quantizing means with each of signals of the third classifying reference patterns from said third storage means, belonging to the second classifying pattern selected by said second classifying means and selecting at least one pattern from among the third classifying reference patterns; and discriminating means for comparing the fourth quantized signal from said fourth quantizing means with eAch of signals of the classifying reference patterns from said fourth storage means, belonging to the third classifying pattern selected by said third classifying means and selecting a pattern from among the fourth classifying reference patterns, thereby carrying out the discrimination of the unknown pattern.