CN1007378B - Chinese character retrieval on basis of sound recognition - Google Patents
Chinese character retrieval on basis of sound recognitionInfo
- Publication number
- CN1007378B CN1007378B CN 87101946 CN87101946A CN1007378B CN 1007378 B CN1007378 B CN 1007378B CN 87101946 CN87101946 CN 87101946 CN 87101946 A CN87101946 A CN 87101946A CN 1007378 B CN1007378 B CN 1007378B
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- chinese
- sound
- mark
- tone
- chinese character
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- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
- Document Processing Apparatus (AREA)
Abstract
To shorten a retrieving time by being composed of the speech recognizing device of the Chinese language, a KANJI (Chinese character) character pattern system and a system to select the KANJI/figure of a purpose out of the displayed KANJI/figure. A phonetic symbol and a tone symbol corresponding to a voice are outputted in response to the voice of the Chinese language pronunciated word by word by a speech recognizing device 1 of the Chinese language, the phonetic symbol of the KANJI/figure of the Chinese language is matched to the tone symbol and the character pattern of the KANJI/figure of the Chinese language is stored into a KANJI character pattern file 8. Next, in response to the phonetic symbol and the tone symbol from the speech recognizing device of the Chinese language, the KANJI character pattern matched to the phonetic symbol and the tone symbol is read from a KANJI character pattern file, the KANJI/figure of the Chinese language is displayed into the display, and out of the displayed KANJI/figure, the KANJI/figure of the purpose is selected by the input from a keyboard 4. Thus, a retrieving time is shortened.
Description
The invention relates to the voice signal that pronounces according to the Chinese phonetic alphabet and tone is transformed to pronunciation mark and tone mark, with the Chinese indexing unit according to the sound understanding of Chinese of retrieval Chinese, output Chinese written language.
In the indexing unit of original this Chinese characters, adopted key element tablet mode.This key element tablet mode is exactly that whole Chinese characters with Chinese are printed on the key element tablet, on the Chinese character that has printed, enclose coding, Chinese character on the key element tablet is detected by staff, by depressing with nib etc., the coding of Chinese character just is sent signal conditioning package, and the Chinese character character and graphic data that conform to this coding just are displayed on the CRT(cathode-ray tube (CRT)) on.The applicant will adopt the N6300/50N Chinese terminal of this retrieval mode to output to China, for generally using.
Also have, because this mode must detect 1 Chinese character from whole Chinese characters of the Chinese on the key element tablet, this compares with sound understanding input mode of the present invention needs 2.5～6 times retrieval time.
The objective of the invention is to by sound understanding and can be directly according to sound with the retrieval Chinese characters, thereby improve above-mentioned shortcoming, so that the Chinese indexing unit of the retrieval high speed that can make Chinese to be provided.
Chinese indexing unit according to sound understanding of the present invention is to have display device and keyboard, and the Chinese indexing unit that Chinese is retrieved from file, it comprises:
Respond to the pronunciation of word one by one Chinese sound and will be corresponding to the sound understanding device of the Chinese of the pronunciation mark of this sound and the output of tone mark.
The pronunciation mark of the Chinese character/numeral of Chinese and tone mark are merged together Chinese character text graphics file with the character and graphic of the Chinese character/numeral of storage Chinese.
Respond to pronunciation mark and tone mark from the sound understanding device of above-mentioned Chinese, the Chinese character character and graphic that will be consistent with this pronounce mark and tone mark is read from above-mentioned Chinese character text graphics file, Chinese character/the numeral that in above-mentioned display device, shows Chinese, simultaneously from shown Chinese character/numeral, the input by above-mentioned keyboard is with the selecting arrangement of Chinese character/numeral of selecting purpose.
Fig. 1 is the figure that shows according to an embodiment of indexing unit of the present invention, Fig. 2 is the formation and the sound input part of display control unit, the figure of the annexation of CRT, keyboard and test pattern file, Fig. 3 is the figure of the file layout of display standard graphic file, Fig. 4 is the figure of the annexation of the sound understanding device of the formation of display information processor and Chinese and Chinese character text graphics file, and Fig. 5 is the figure that shows the file layout of Chinese character text graphics file.
Below with reference to accompanying drawings the Chinese indexing unit according to sound understanding of the present invention at length is illustrated.
With reference to Fig. 1, one embodiment of the invention have by the sound input part 2 that carries out the sound input, the keyboard 4 of data input usefulness, show at least one pronunciation mark, tone, the CRT3 of Chinese characters and input data, with sound coding data, logical address, pronunciation mark and tone are pressed the test pattern file 6 of the sequential storage of mandarin pronunciation table, and control the control part 5 of these inscapes and the Chinese sound understanding device 1 that constitutes, signal conditioning package 7 and by the Chinese character text graphics file 8 of the Chinese character/numeric literal figure of the sequential storage Chinese of pronunciation mark and tone.
Secondly, the work of having used Chinese sound to be familiar with the Chinese indexing unit of device 1 is explained.
For example, in the time of retrieving " I learn Chinese in Japan " this sentence, to sound input part 2, cooperate pronunciation mark and tone, pronunciation word-for-word is " W ǒ za
r
B ě n gu ó xu é x í zh ō ng w é n ".
Secondly, with reference to Fig. 1, Fig. 2 and Fig. 3 formation and the work of the Chinese sound of this sound input, understanding being familiar with device 1 is explained.
As the prerequisite of sound understanding, must constitute test pattern file 6.The formation of this test pattern file 6 is carried out as following.
With reference to Fig. 2, for example pronounce mark " wo " and tone " the 3rd (
) " combination and pronunciation when " w ǒ ", import with will pronounce mark data " wo " and tone mark data " 3 " of keyboard 4.Like this, the data that are transfused to " wo " reach " 3 " phonetic and voice tone mark data portion 582 by Keyboard Control portion 58 and are sent to document control portion 57, by phonetic and voice tone mark write section 572 be stored in test pattern file 6 decide address, address n for example shown in Figure 3
7On.At this moment, when data " wo " reached " 3 " and are sent to document control portion 57, the signal that display file constitutes just was sent to retrieval/file formation detecting element 62.
The sound that is pronounced under such state " w ǒ " is transformed to electric signal and is exaggerated at sound input part 2, carries out analog/digital conversion by low-pass filter.This example can be with reference to U.S. Patent bulletin 4,239, the record on No. 936 Fig. 3 and the 4th hurdle.Be transformed the sound electric signal of digital form like this,, for example be encoded by ecad difference pulse sign indicating number modulation (ADPCM) mode at acoustic coding control part 60.The sound coding data that is encoded in this mode is stored in the storage part 61, is read out then, is sent to retrieval/file again and constitutes detecting element 62.It is that file constitutes processing that retrieval/file formation detecting element 62 has detected this according to above-mentioned signal, so just the sound coding data of receiving is delivered to the sound coding data write section 571 of document control portion 57.This sound coding data write section 571 with sound coding data be stored in test pattern file 6 decide address, address n for example shown in Figure 3
7On.Shown in Figure 3 " Ah ", " day ", " ", " basis ", " in ", the group of " habit ", " state ", " literary composition ", " ", " pressing " sound coding data, pronunciation mark and tone separately be stored in respectively on the fixed address, to constitute test pattern file 6.
Secondly, processing is described in detail with regard to the understanding of the sound in the indexing unit of the present invention.
At first the sound that is pronounced " w ǒ " is transformed to digital signal 2 ones of sound inputs, is encoded at acoustic coding control part 60, is stored in the storage part 61 as sound coding data then.At this moment, owing to there are not data to be transfused to from keyboard 4, the sound coding data that is read out from storage part 61 constitutes be retrieved processing and detecting of detecting element 62 at retrieval/file, then is sent to comparison control part 51.On the other hand, read portion 573 from test pattern file 6 by sound coding data and read sound coding data in turn, and it is delivered to comparison control part 51.At comparison control part 51, will constitute the data of detecting element 62 and the data comparison in turn of reading portion 573 in turn from sound coding data from retrieval/file.Consistent judging part 52 is made consistent or inconsistent judgement according to comparative result.Only otherwise be judged as unanimity, relatively finish detecting element 53 till the final data that is judged as test pattern file 6, repeatedly carrying out relatively working of control part 51 relatively.Its result is judged as when inconsistent unceasingly until last data, sends the signal that finishes at the detecting element that relatively finishes.Error display control unit 55 responds to this signal and reads portion 575 to control information and send control information and read indication.Thereby control information is read portion 575 and is responded to this indication test pattern file 6 reading error information, and sends this information to control information display part 562.Error display control unit 55 responds to the above-mentioned signal that finishes to the 562 output expression indications of control information display part.562 of control information display parts respond to this and show indication, will be presented on the CRT3 from the control information that control information is read portion 575.This control information demonstrates: " pronouncing badly of Chinese, this is the pronunciation that does not have storage in test pattern file 6 ".So the people who does retrieval with pronunciation just attempts pronunciation with correct Chinese speech pronunciation again.
On the other hand, when above-mentioned consistent judging part 52 was judged as unanimity, pronunciation mark generation indicating section 54 was just read portion 574 to the phonetic and voice tone mark of document control portion 57 and is sent and read indication.Respond to this and read indication, the phonetic and voice tone mark is read portion 574, the pronunciation mark " wo " and the tone " 3 " of normative document 6 are read, and the portion that posts a letter 591 by communication control unit 59, deliver to signal conditioning package 7.Simultaneously, pronunciation mark generation instruction unit 54, the phonetic and voice tone mark display part 561 of CRT control part 56 provided show indication, this phonetic and voice tone mark display part 561 will be presented on the CRT3 from pronunciation mark " wo " and the tone " 3 " that the phonetic and voice tone mark is read portion 574.
Secondly, to being provided this pronunciation mark " wo " and the signal conditioning package of tone " 3 " and the formation and the work thereof of Chinese character text graphics file 8, explain with reference to Fig. 1, Fig. 4 and Fig. 5.With reference to Fig. 1 and Fig. 4, the pronunciation mark " wo " and the tone " 3 " that are provided by Chinese sound understanding device 1, the communication control unit 71 by signal conditioning package 7 is stored in the storage part 72.Pronunciation mark " wo " and tone " 3 " that phonetic and voice tone comparing section 73 will be read out from storage part 72 compare with the pronunciation mark " A " shown in Figure 5 and the tone " 1 " of Chinese character text graphics file 8.Because result relatively is inconsistent, with this inconsistent notice detecting element 74 that finishes.The detecting element 74 that finishes is judged in whole pronunciation mark/tones of phonetic and voice tone comparing section 73 Chinese character text graphics files 8 and more whether finishing of the pronunciation mark/tone that is provided by storage part 72.If also do not finish, just phonetic and voice tone comparing section 73 is sent indication, make it until relatively finishing, repeat in turn relatively to work.In phonetic and voice tone comparing section 73, the pronunciation mark " wo " and the tone " 3 " that will be read out from storage part 72 compare with the pronunciation mark " wo " shown in Figure 5 and the tone " 3 " of Chinese character text graphics file 8.Because comparative result shows consistent, thus pronunciation mark " wo " shown in Figure 5 and tone " 3 " and on the same group in Chinese character character and graphic " 1. I " be stored in the storage part 72.This Chinese character character and graphic " 1. I " is sent to control part 5 from storage part 72 by communication control unit 71.
In phonetic and voice tone comparing section 73, when being compared, whole pronunciation mark/tones of Chinese character text graphics file 8 finish, and do not have yet to obtain consistent result, and detected when finishing at the detecting element 72 that finishes, control information just takes place in control information generating unit 75.This control information is sent to control part 5 by communication control unit 71.
Below the Chinese character character and graphic that just is read out from signal conditioning package 7 and the selection display process of control information, described in detail with reference to Fig. 1, Fig. 2 and Fig. 5.
At first, the display process to Chinese character image describes.
With reference to Fig. 1 and Fig. 2, the Chinese character character and graphic that is provided by signal conditioning package 7 " 1. I " is shown on the CRT3 by the receiving part 592 of communication control unit 59 and the Chinese character character and graphic display part 563 of CRT control part 56.At this moment, so " 1. I " word just because the Chinese character character and graphic is nonoptional necessity.Moreover, on the CRT picture, except this Chinese character character and graphic " 1. I ", also read portion 574 and read from test pattern file 6 by the phonetic and voice tone mark, by phonetic and voice tone mark display part 561, will pronounce mark " wo " and tone mark " 3 " are presented on the CRT3.Therefore, on the CRT picture, except " wo " reaches " 3 ", also showing " 1. I ".
Secondly the example that must elect and handle, is described in order to show the Chinese character character and graphic.
Because retrieval is " I learn Chinese in Japan ", so " I " afterwards, from keyboard 4 input pronunciation mark data " ZAI " and tone mark data " 4 ", " z à i " pronounced and is transfused at sound input part 2 simultaneously.Then, in the same manner as described above, from the logical address n of test pattern file 6
2Read pronunciation mark " ZAI " and tone " 4 ", and be presented on the CRT3, be sent to signal conditioning package 7 simultaneously.At signal conditioning package 7, be read out and deliver to control part 5 from Chinese character text graphics file 8 with pronunciation mark " ZAI " and the corresponding to Chinese character character and graphic of tone " 4 " " 1. again, 2., 3. year ".At control part 5, by receiving part 592 and Chinese character character and graphic display part 563, " 1. again, 2., 3. year " is displayed on the CRT3.Retrieval person then sees this CRT3 picture, from keyboard 4 numerical data " 2 " is imported.This numerical data " 2 " is sent to the Chinese character character and graphic selection portion 564 of CRT control part 56 by the numerical data portion 581 of Keyboard Control portion 58.564 pairs of Chinese character character and graphics of Chinese character character and graphic selection portion display part 563 sends selects indication, make it the figure shown by Chinese character character and graphic portion 563 " 1. again, 2., 3. year " among, only show " 2. existing ".Chinese character character and graphic display part 563 responds to this indication, only selects " 2. existing ", and is presented on the CRT3.
The control information that is taken place when secondly, pronunciation mark that is just sent when 5 pairs of signal conditioning packages 7 of control part and tone are not present in the Chinese character text graphics file 8 is illustrated in the processing of control part 5.
With reference to Fig. 2, the control information of being sent by the signal conditioning package 7 of Fig. 1 is shown on the CRT3 by the receiving part 592 of communication control unit 59 and the Chinese character character and graphic display part 563 of CRT control part 56.At this moment, on CRT3, showing and reading portion 574 by the phonetic and voice tone mark and be read out from test pattern file 6, and the pronunciation mark and the tone that are transmitted by phonetic and voice tone mark display part 561.Therefore, on CRT3, except pronunciation mark and tone, the also synthetic control information that showing.As a result, though retrieval person just recognizes that the pronunciation of Chinese is correct, the Chinese characters character and graphic that not existing in Chinese character text graphics file 8 pronounced.
Utilize aforesaid way, to " Japan learns Chinese " remaining among " I learn Chinese in Japan " also one by one word ground retrieve.Promptly at sound input part input " r
" time, from keyboard 4 input pronunciation mark " RI " and tone marks " 4 ".Respond to this input, control part 5 has been read at the address of test pattern file 6 n
1Pronunciation mark " RI " and tone " 4 ", and it is presented on the CRT3, deliver to signal conditioning package 7 simultaneously.Signal conditioning package 7 is read Chinese character character and graphic " 1. day " according to this pronunciation mark " RI " and tone " 4 " from Chinese character text graphics file 8, and is presented on the CRT3 by control part 5.
Secondly, will " b ě n " input from sound input part 2, import from will pronounce mark " BEN " and tone " 3 " of keyboard 4 simultaneously.Respond to this input, control part 5 is with the address n of test pattern file 6
3In pronunciation mark " BEN " and tone " 3 " read, and be presented on the CRT3, deliver to signal conditioning package 7 simultaneously.Signal conditioning package 7 is read " 1., 2. scoop up with a dustpan, 3. benzene " according to this pronunciation mark " BEN " and tone " 3 " from Chinese character text graphics file 8, and by control part 5 it is presented on the CRT3.Retrieval person is from keyboard 4 input digital datas " 1 ", just have only Chinese character character and graphic " 1. " selected, and be presented on the CRT3, remaining Chinese character character and graphic " 2. scoop up with a dustpan, 3. benzene " then from the picture of CRT3 by cancellation.
Then, from 2 inputs " gu ó " of sound portion, simultaneously from keyboard 4 input pronunciation mark " GUO " and tones " 2 ".Respond to this input, control part 5 will be at the address of test pattern file 6 n
6On pronunciation " GUO " and tone " 2 " read, and be presented on the CRT3, be sent to signal conditioning package 7 simultaneously.Signal conditioning package 7 is according to this pronunciation mark " GUO " and tone " 2 ", reads Chinese character character and graphic " 1. state, 2. from Chinese character text graphics file 8
, 3. slap, 4. women's headgear, 5. Guo, a state in the Zhou Dynasty, 6. Guo, 7. popliteal ", and be presented on the CRT3 by control part 5., just have only Chinese character character and graphic " 1. state " selected, and be presented on the CRT3 from keyboard 4 input digital datas " 1 " by retrieval person, other Chinese character images " 2.
, 3. slap, 4. women's headgear, 5. Guo, a state in the Zhou Dynasty, 6. Guo, 7. popliteal " then from the picture of CRT3 by cancellation.
Then, from 2 inputs " xu é " of sound input part, simultaneously from keyboard 4 input pronunciation mark " XUE " and tones " 2 ".Control part 5 responds to this input, will be at the address of test pattern file 6 n
9Pronunciation mark " XUE " and tone " 2 " read, and be shown on the CRT3, be sent to signal conditioning package 7 simultaneously.Signal conditioning package 7 is according to this pronunciation mark " XUE " and tone " 2 ", from Chinese character text graphics file 8, read the Chinese character character and graphic " 1. the cave; 2. Xue; 3. ; 4. learn; 5. Xue; 6. go around, 7. laugh "; And be presented on the CRT3 by control part 5.; Just have only " 4. learn " selected; And be presented on the CRT3 from keyboard 4 input digital datas " 4 " by retrieval person; Other Chinese character image " is the cave 1., 2. Xue, 3. , 5. Xue, 6. go around, 7. laugh " then from the picture of CRT3 by cancellation.
Secondly, from sound input part input " x í ", simultaneously from keyboard 4 input pronunciation mark " XI " and tones " 2 ".Control part 5 responds to this input, will be at the address of test pattern file 6 n
5On pronunciation mark " XI " and tone " 2 " read, and be presented on the CRT3, deliver to signal conditioning package 7 simultaneously.Signal conditioning package 7 according to this pronunciation mark " XI " and tone " 2 " from Chinese character text graphics file 8, read the Chinese character character and graphic " 1. practise, 2. Xi, 3. Xi, 4. seat, 5. the sorcerer, 6. attack, 7. daughter-in-law, 8. low marshy land, 9. war proclamation setting forth the purpose of the expedition and enumerating the crimes of the enemy ", and be presented on the CRT3 by control part 5., just have only " 1. practise " selected, and be presented on the CRT3 from keyboard 4 input digital datas " 1 " by retrieval person, other Chinese character image " 2. Xi, 3. Xi, 4. seat, 5. the sorcerer, 6. attack, 7. daughter-in-law, 8. low marshy land, 9. war proclamation setting forth the purpose of the expedition and enumerating the crimes of the enemy " then from the picture of CRT3 by cancellation.
Then, from 2 inputs " zh ō ng " of sound input part, simultaneously from keyboard 4 input pronunciation mark " ZHONG " and tones " 1 ".Control part 5 responds to this input, will be at the address of test pattern file 6 n
4On pronunciation mark " ZHONG " and tone " 1 " read, and be presented on the CRT3, deliver to signal conditioning package 7 simultaneously.Signal conditioning package 7 is according to this pronunciation mark " ZHONG " and tone " 1 ", from Chinese character text graphics file 8, read the Chinese character character and graphic " 1., 2. loyalty, 3. cup, 4. clock, 5. inner feelings, 6. alarmed and panicky, 7. eventually, 8. Zhong ", and be presented on the CRT3 by control part 5.By retrieval person from keyboard 4 input digital datas " 1 ", just have only Chinese character character and graphic " 1. " selected, and be presented on the CRT3, other Chinese character images " 2. loyalty, 3. cup, 4. clock, 5. inner feelings, 6. alarmed and panicky, 7. eventually, 8. Zhong " then from the picture of CRT3 by cancellation.
At last, from 2 inputs " w é n " of sound input part, simultaneously from keyboard 4 input pronunciation mark " WEN " and tones " 2 ".Control part 5 responds to this input, will be at the address of test pattern file 6 n
8On pronunciation mark " WEN " and tone " 2 " read, and be shown on the CRT3, deliver to signal conditioning package 7 simultaneously.Information processing 7 is according to this pronunciation mark " WEN " and tone " 2 ", from Chinese character text graphics file 8 read the Chinese character character and graphic " 1. literary composition, 2. line, 3. literary composition, 4. mosquito, 5. cloud tints, 6. hear, 7. Wen ", and be presented on the CRT3 by control part 5., just have only Chinese character character and graphic " 1. literary composition " selected, and be presented on the CRT3 from keyboard 4 input digital datas " 1 " by retrieval person, other Chinese character images " 2. line, 3. literary composition, 4. mosquito, 5. cloud tints, 6. hear, 7. Wen " then from the picture of CRT3 by cancellation.
According to indexing unit of the present invention, as long as, just have the effect of the Chinese character character/number that can retrieve Chinese simply with the domestic mandarin pronunciation of using of China.
Also have, indexing unit of the present invention by utilizing the sound understanding device of Chinese, just can be retrieved the Chinese character of Chinese at high speed.
Claims (2)
1, a kind of have display and a keyboard, and the Chinese indexing unit of retrieval Chinese from file is characterized in that comprising:
Respond to the word for word sound of the Chinese of pronunciation, will be familiar with device corresponding to the pronunciation mark of this sound and the Chinese sound of tone mark output,
With the pronunciation mark and the tone mark of the Chinese character/numeral of Chinese, with the Chinese character text graphics file of the character and graphic storage of the Chinese character/numeral of Chinese,
Respond to sound mark and tone mark from above-mentioned Chinese sound understanding device, to from above-mentioned Chinese character text graphics file, read with this pronounce mark and the corresponding to Chinese character character and graphic of tone mark, and on above-mentioned display device, the Chinese character of Chinese/numeral is shown, simultaneously among shown Chinese character/numeral, by from the input of above-mentioned keyboard selecting arrangement with Chinese character/numeral of selecting purpose.
2, the indexing unit of the described Chinese of claim 1 is characterized in that said Chinese sound understanding device comprises:
With sound mapping is electric signal carrying out the sound input mechanism of analog/digital conversion,
To in this sound input mechanism, be carried out the acoustic coding control gear of the sound signal encoding of analog/digital conversion,
Will be in this acoustic coding control gear and the storing mechanism of the sound coding data that is encoded storage,
The corresponding sound coding data of the sound that as one man pronounces with the pronunciation mark of Chinese, tone and with these pronunciation mark harmony phase modulation is as test pattern and the test pattern file of storing in advance,
The comparison mechanism that the sound coding data of the test pattern of this test pattern file is compared with the sound coding data of above-mentioned storing mechanism,
When this relatively comparative result of mechanism show when consistent, will be corresponding to the pronunciation mark of the sound coding data of the unanimity of above-mentioned test pattern file organization and the output mechanism that tone is exported as recognition results.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52367/1986 | 1986-03-12 | ||
| JP5236786 | 1986-03-12 | ||
| JP52368/1986 | 1986-03-12 | ||
| JP5236886 | 1986-03-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN87101946A CN87101946A (en) | 1987-09-23 |
| CN1007378B true CN1007378B (en) | 1990-03-28 |
Family
ID=26392978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87101946 Expired CN1007378B (en) | 1986-03-12 | 1987-03-12 | Chinese character retrieval on basis of sound recognition |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1007378B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386759C (en) * | 2003-04-15 | 2008-05-07 | 李琳山 | Chinese information retrieve method based on speech |
| CN101901255A (en) * | 2010-07-20 | 2010-12-01 | 无敌科技(西安)有限公司 | System and method for inquiring vocabularies |
| CN102981767B (en) * | 2012-11-28 | 2015-08-19 | 中国地质大学（武汉） | A kind of individual Chinese character hand-written recognition method and system |
-
1987
- 1987-03-12 CN CN 87101946 patent/CN1007378B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN87101946A (en) | 1987-09-23 |
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