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    • 24. 发明专利
    • COORDINATE VALUE CHECKING CIRCUIT
    • JPS55140971A
    • 1980-11-04
    • JP4789179
    • 1979-04-20
    • TOKYO SHIBAURA ELECTRIC CO
    • WAKAZONO SHIGEO
    • G06F3/041G06F3/043G06F3/048G06K9/30G06K11/06G06T1/00
    • PURPOSE:To avoid sending the erroneous data to the processor by disregarding the erroneous data in case the continuous coordinate value is read out mistakenly, thus omitting the data check at the processor. CONSTITUTION:Reading data 10 of the coordinate value read out first is stored into the 1st register 11 via reading pulse 14 which is supplied simultaneously. Then data 10 stored in register 11 is stored into the 2nd register 12 via the reading pulse which is delayed by the fixed time through delay circuits 15 and 16. The comparison is given through comparator 13 between reading data 10 of the coordinate value which is supplied continuously and reading data 10 which was read precedingly and stored into register 12. And in case the difference of the absolute values is within the fixed range, the logic product of AND gate circuit 17 is set up by the output of comparator 13 to deliver data strobe pulse 18. While in case the difference of the absolute values exceeds the fixed range, the logic product of circuit 17 is not set up. Thus the transmission of the erroneous data is inhibited to the processor.
    • 25. 发明专利
    • ONLINE CHARACTER FEATURE EXTRACTOR
    • JPS55138172A
    • 1980-10-28
    • JP4708479
    • 1979-04-17
    • FUJITSU LTD
    • KATOU OSAMUFUJII YOSHIHISA
    • G06K9/62G06K9/30G06K9/46G06K9/52
    • PURPOSE:To discriminate between similar characters by detecting even a slight difference in stroke by extracting as the feature value of a character a time series of four kinds of feature values, i.e., stroke linearity, a relative length ration, an angle of a direction from an initial point to a terminal point, and a change in curvature angle of the stroke. CONSTITUTION:A unit which extracts features regarding strokes of an online character expressed by a time series of strokes expressed by a sequence of representative points is provided with stroke-feature extracting circuit 1. This extracting circuit 1 is provided with linearity extracting circuit 2 which extracts the linearity of each stroke, length-ratio extracting circuit 3 which extracts length ratios, direction angle extracting circuit 4 which extracts the angle of the direction from an initial point to a terminal point, and angle-change extracting circuit 5 which extracts the angle change showing the curvature of each stroke, thereby applying extracted feature values to stroke feature storage buffer 7. Then, a slight difference between strokes is detected by each feature value to discriminate between similar characters correctly.
    • 26. 发明专利
    • HANDDWRITTEN PATTERN RECOGNITION UNIT
    • JPS55123776A
    • 1980-09-24
    • JP3143379
    • 1979-03-16
    • NIPPON ELECTRIC CO
    • SHIROKURA HIROKI
    • G06K9/62G06K9/30G06K11/06
    • PURPOSE:To improve accuracy of recognition with a simple hard constitution, by detecting the input sequence of hand-written patterns and by comparing this detection output with the input sequency, which is previously stored in a memory means, to recognize hand-written input patterns. CONSTITUTION:Tablet plate 13 detects the position signal of pen 14, and this position signal and the ON signal of pen 14 are given to pattern control part 15, and control part 15 decomposes the hand-written pattern into picture elements on a absis of two signals and gives them to picture element sequence 16. Picture element sequence 17 is a picture element sequence retrieved from picture element sequence file 19 where all picture elements for the recognition object pattern are recognized previously, and coincidence circuit detection circuit 18 detects coincidence between sequence 16 and sequence 17, and the detection result obtained by checking whether coincidence between them is detected or not is given to decision circuit 20. Circuit 20 outputs a trigger signal to character synthesizing circuit 21 when obtaining coincidence between them, and circuit 21 takes out respective picture elements from sequence 17 and synthesizes them and types out them on typewriter 12.