JPS6128181A - Pattern information pressing device - Google Patents
Pattern information pressing deviceInfo
- Publication number
- JPS6128181A JPS6128181A JP15042884A JP15042884A JPS6128181A JP S6128181 A JPS6128181 A JP S6128181A JP 15042884 A JP15042884 A JP 15042884A JP 15042884 A JP15042884 A JP 15042884A JP S6128181 A JPS6128181 A JP S6128181A
- Authority
- JP
- Japan
- Prior art keywords
- angle information
- similarity
- information
- pattern
- degree
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- Character Discrimination (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は文字、記号等をｇｗｔするパターン情報圧縮装
置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a pattern information compression device for compressing characters, symbols, etc.
背景技術とその問題点
従来、オンライン手書き文字認識なりＰマツチング処理
により行なうことが提案されている。この様なオンライ
ン手書き文字認識においては、同じ文１字でも手書き時
に部分的に伸び縮みを生じ微妙に違う文字パターンにな
るのをＤＰマツチング処理により修正している。即ち、
第１図人に実線にて示す如き「２」という文字に対して
破線矢印に示す如き順序でベクトル抽出が行なわれる。BACKGROUND ART AND PROBLEMS Conventionally, online handwritten character recognition or P matching processing has been proposed. In such online handwritten character recognition, DP matching processing is used to correct the fact that even the same character may partially expand or contract during handwriting, resulting in a slightly different character pattern. That is,
Vector extraction is performed for the character "2" as shown by the solid line in FIG. 1 in the order shown by the broken line arrows.
この場合、文字パターンのベクトル抽出においては第２
図に示す如き文字線の移動方向を示す単位長の８方向接
線ベクトルａ ＝ ｈにて行なわれる。このベクトル抽
出により第１図ＡＫ示す「２」から第１図Ｂの上側に示
す如き角度情報を有する接線ベクトルの時系列Ｃｓ ｂ
％ｂ ｓ ａ ｓ ａ ｓ ｈ ｓ ｈｓ ｇ ｓ
ｇ 、’ ｓ ’、ｆ、ｆ、ｆ、ｆ、ｆ、ｆ、ｆ、ｆ％
ｉ、ａ、ａ、ａ、ａ、ａが標準パターンとして得られる
。In this case, in the vector extraction of the character pattern, the second
This is carried out using an eight-direction tangential vector a=h of unit length indicating the moving direction of the character line as shown in the figure. Through this vector extraction, a time series Cs b of tangent vectors having angle information as shown in the upper side of FIG. 1B from "2" shown in FIG. 1AK is obtained.
%b s a s a s h s hs g s
g, 's', f, f, f, f, f, f, f, f%
i, a, a, a, a, a are obtained as standard patterns.
これに対し第１図Ｃに示す如き書き出しの上向きの部分
αが比較的長く、左斜め下向きの部分βが比較的短く、
最後の横向きの部分子が比較的短い「２」という文字が
入力されると、上述と同様に第１図Ｂの下側に示す如き
角度情報を有する接線ベクトルの時・系列ｃ、ｃ、ｃ、
ｂ、ｂ、ａ％ａ、ｈ、ｈ。On the other hand, as shown in FIG.
When the character "2" whose last horizontal part molecule is relatively short is input, the time series c, c, c of tangent vectors having angle information as shown in the lower part of FIG. ,
b, b, a% a, h, h.
ＩＩ ｓ ｇ ｓ ｇ ｓ ｆ ％ｆ ｓ ｆ ｓ ’
ｓ ’ ｓ ’ ｓ ” ｓ ａ ｓ ａｓ ａが入
カバターンとして得られる。この場合、第１図Ｃに示す
「２」の文字パターンの文字線長の各部の伸縮は対応す
る部分の接線ベクトルの伸縮となる。II s g s g s f %f s f s'
s ' s ' s ” s a s as a is obtained as an input cover pattern. In this case, the expansion and contraction of each part of the character line length of the character pattern "2" shown in Figure 1C is the expansion and contraction of the tangent vector of the corresponding part. becomes.
ＤＰマツチング処理においては第１図Ｂの上側及び下側
に夫々示す標準パターン及び入カバターンの接線ベクト
ルの相違を距離と定義して、標準パターン及び入カバタ
ーン間の距離が最小になる軍備関係が定められ、文字パ
ターンの文字線長の各部の伸縮が修正される。In the DP matching process, the difference between the tangent vectors of the standard pattern and the input cover pattern shown in the upper and lower sides of Figure 1B, respectively, is defined as the distance, and the military relationship that minimizes the distance between the standard pattern and the input cover pattern is determined. The expansion and contraction of each part of the character line length of the character pattern is corrected.
この様なりＰマツチング処理においては標準パターンと
して！１図Ｂの上側に示す如き角度情報を有する接線ベ
クトルの時系列を全【登録し、この登録パターンと入カ
バターンとをマツチング処理しなければならず、比較的
大容量の標準パターンメモリを必要とすると共にマツチ
ング処理の為に比較的多くの演算量を必要とする不都合
があった。This is the standard pattern for P matching processing! It is necessary to register all the time series of tangent vectors having angle information as shown in the upper part of Figure 1B, and to perform matching processing between this registered pattern and the input cover pattern, which requires a relatively large capacity standard pattern memory. At the same time, there is an inconvenience that a relatively large amount of calculation is required for the matching process.
発明の目的
本発明は斯かる点に鑑みパターンより得られる角度情報
を有効に圧縮することができるものを得ることを目的と
する。OBJECTS OF THE INVENTION In view of the above, an object of the present invention is to provide an apparatus that can effectively compress angle information obtained from a pattern.
発明の概要
本発明は角度情報検出部を有し、この角度情報検出部の
角度情報を情報圧縮部及び類似度検出部に夫々供給し、
類似度検出部にて角度情報間の類似度を検出し、類似度
検出部の検出出力に応じて情報圧縮部にて角度情報を情
報圧縮するようにしたものであり、斯かる本発明パター
ン情報圧縮装置に依ればパターンより得られる角度情報
を有効に情報圧縮することができるものを得ることがで
きる利益がある。Summary of the Invention The present invention includes an angle information detection section, supplies angle information from the angle information detection section to an information compression section and a similarity detection section, and
The similarity detecting section detects the degree of similarity between the angle information, and the information compressing section compresses the angle information according to the detection output of the similarity detecting section. The compression device has the advantage of being able to effectively compress the angle information obtained from the pattern.
実施例
以下、本発明パターン情報圧縮装置の一実施例を第３図
及び第４図を参照しながら説明しよう。Embodiment Hereinafter, one embodiment of the pattern information compression apparatus of the present invention will be described with reference to FIGS. 3 and 4.
この第３図及び第４図において第１図及゛び第２図と対
応する部分に同一符号を付してその詳細な説明は省略す
る。In FIGS. 3 and 4, parts corresponding to those in FIGS. 1 and 2 are designated by the same reference numerals, and detailed explanation thereof will be omitted.
第３図において、（１）は角度情報検出部を示し、この
角度情報検出部（１）はタブレット上に書かれた文字か
らサンプリングによりその文字パターンの角度情報を検
出する。この文字パターンの角度情報は第２図に示す如
き単位長４５度違いの８方向接線ベクトルａ ％ ｈよ
りなる。この角度情報検出部（１）の角度情報を類似度
検出部（２）に供給する。この類似度検出部（２）は角
度情報間の類似度が所定の閾値以内であるかどうかを検
出する。In FIG. 3, (1) indicates an angle information detection section, and this angle information detection section (1) detects angle information of a character pattern by sampling characters written on a tablet. The angle information of this character pattern consists of tangential vectors a % h in eight directions with unit lengths different by 45 degrees as shown in FIG. The angle information from the angle information detection section (1) is supplied to the similarity detection section (2). This similarity detection unit (2) detects whether the similarity between angle information is within a predetermined threshold.
この為に、角度情報検出部（１）の角度情報を類似度検
出部（２）を構成する検出器（３）の一端及び比較用メ
モリ（４）に夫々供給し、この比較用メモリ（４）の保
持している角度情報を検出器（３）の他端に供給し、こ
の検出器（３）の検出出力を制御信号として比較用メモ
リ（４）に供給する。この検出器（３）は角度情報間の
類似度（これは接線ベクトル間の角度差である。）を端
子（３ｍ）に得られる閾値（これは角度情報検出部（１
）の分解能に応じて設定され、本例においては０度であ
る。）と比較し、検出出力とし【類似度が閾値以内であ
る場合に類似信号を出力し、角度情報間の類似度が閾値
を超える場合に非類似信号を出力する。For this purpose, the angle information of the angle information detection section (1) is supplied to one end of the detector (3) constituting the similarity detection section (2) and the comparison memory (4), respectively. ) is supplied to the other end of the detector (3), and the detection output of this detector (3) is supplied as a control signal to the comparison memory (4). This detector (3) calculates the similarity between angular information (this is the angular difference between tangent vectors) using a threshold value obtained at the terminal (3m).
), and in this example, it is 0 degrees. ), and outputs a similar signal as a detection output when the degree of similarity is within a threshold, and outputs a dissimilar signal when the degree of similarity between angle information exceeds the threshold.
又、比較用メモリ（４）は検出器（３）の類似信号を受
けて記憶内容を保持し、非類似信号を受けて記憶内容を
更新、即ちその時供給されている角度情報を記憶内容と
・して記憶する。Further, the comparison memory (4) receives a similar signal from the detector (3) and retains the stored content, and receives a dissimilar signal and updates the stored content, that is, it uses the angle information supplied at that time as the stored content. and memorize it.
一方、角度情報検出部（１）の角度情報を情報圧縮部（
５）に供給すると共に類似度検出部（２）の検出器（３
）の検出出力を制御信号として情報圧縮部（５）に供給
する。この情報圧縮部（５）は制御信号として類似信号
が供給された場合にその時供給されている角度情報を除
去し、非類似信号が供給された場合にその時供給されて
いる角度情報を出力する。On the other hand, the angle information of the angle information detection unit (1) is converted to the information compression unit (
5) and the detector (3) of the similarity detection unit (2).
) is supplied to the information compression section (5) as a control signal. This information compressor (5) removes the angle information supplied at the time when a similar signal is supplied as a control signal, and outputs the angle information supplied at the time when a dissimilar signal is supplied.
この情報圧縮部（５）の情報圧縮された角度情報をモー
ド切換スイッチ（６）を介して、登録モードにおいては
認識対象パターン毎に標準パターンメモリ（７）に格納
し、＊識モードにおいてはＤＰマツチング処理部（８）
の一端に供給する如くなす。又、この認識モードにおい
ては標準パターンメモリ（７）に格納されている標準パ
ターンなりＰマツチング処理部（８）の他端に供給する
如くなす。The compressed angle information of the information compression unit (5) is stored in the standard pattern memory (7) for each recognition target pattern in the registration mode via the mode changeover switch (6), and in the *identification mode, it is stored in the standard pattern memory (7). Matching processing section (8)
so that it is supplied to one end of the In this recognition mode, the standard pattern stored in the standard pattern memory (7) is supplied to the other end of the P matching processing section (8).
斯かる構成に依れば第４図人の実線にて示す如き「２」
なる文字がタブレット上にて書かれると、この文字パタ
ーンより第４図人の破線にて示す如館順序でベクトル抽
出がなされ角度情報検出部（１）より第４図Ｂに示す如
き接線ベクトルの時系列Ｃ１ｂ ｓ ｂｓ ” ｓ ”
％ ｈｓ ｈｓ ｇ ｓ ｇ ｓ ｆ ｓ ｆ ｓ
ｆ ｓ ｆ ｓ ｆ １ｆ、ｆ ｓｆ ｓ ｆ 、、ｆ
ｓ ａ 、ａ、” ｓ ａ 、ａ ｓ ａよりなる角
度情報が得られる。類似度検出部（２）にてこの接線ベ
クトルの時系列Ｃ１・・・・・・、ａよりなる角度情報
からその角度情報の類似する部分が検出され、この類似
度検出部（２）の検出出力に応じて情報圧縮部（５）に
て角度情報検出部（１）の角度情報が情報圧縮される。According to this configuration, "2" as shown by the solid line in Figure 4
When a character is written on the tablet, vectors are extracted from this character pattern in the order shown by the dashed line in Figure 4, and the angle information detection unit (1) extracts the tangent vector as shown in Figure 4B. Time series C1b s bs “s”
% hs hs g s g s f s f s
f s f s f 1f, f sf s f ,, f
The angle information consisting of s a , a, ” s a , a s a is obtained. The similarity detection unit (2) calculates the angle information consisting of the time series C1 of this tangent vector C1..., a. Similar parts of the angle information are detected, and the angle information of the angle information detector (1) is compressed in the information compressor (5) according to the detection output of the similarity detector (2).
即ち、類似度検出部（２）にて角度情報としての接線ベ
クトルの時系列Ｃ１・・・・・・、ａのうち第２番目及
び第３番目のす、第４番目及び第５番目のａ１第６番目
及び第７番目のｈ１第８番目及び第９番目のｇ、第１０
番目乃至第１９番目のｆ、第２０番目乃至第２５番目の
ａにおいて夫々類似であることが検出され、情報圧縮部
（５）にて第４図Ｂに示す如き接線ベクトルの時系列Ｃ
１・・・・・・、ａよりなる角度情報が第４図Ｃに示す
如き接線ベクトルの時系列Ｃ％ｂｓｌｌｓｂ。That is, the time series C1 of tangent vectors as angle information in the similarity detection unit (2)..., the second and third a, and the fourth and fifth a1 of a. 6th and 7th h1 8th and 9th g, 10th
Similarities are detected in the th to 19th f and the 20th to 25th a, and the information compression unit (5) generates a time series of tangent vectors as shown in FIG. 4B.
1..., a time series C%bsllsb of a tangent vector whose angle information is shown in FIG. 4C.
ｇ％ｆ、ａよりなる角度情報に情報圧縮される。従って
、マツチング処理におい【重要な情報が欠落することの
ない有効な情報圧縮ができる。The information is compressed into angle information consisting of g%f, a. Therefore, in the matching process, it is possible to perform effective information compression without missing important information.
この様にして情報圧縮された角度情報が登録モードにお
いてモード切換スイッチ（６）を介して標準パターンメ
モリ（７）に格納される。この場合、角度情報が情報圧
縮された分だけ標準パターンメモリ（７）の記憶容量を
少なくできる。The angle information compressed in this manner is stored in the standard pattern memory (7) via the mode changeover switch (6) in the registration mode. In this case, the storage capacity of the standard pattern memory (7) can be reduced by the amount that the angle information is compressed.
又、認識モードにおいて、第４図りに示す如き「２」な
る文字がタブレット上に書かれると、上述と同様この文
字バター／より第４図Ｅに示す如き接線ベクトルの時系
列ｃ、ｃ、ｃ、ｂ、ｂ、ａ、ａ、ｈ、ｈｓｌｌｓｇ％ｇ
、’５ｆｓｆｓｆｓｆｓｆｓｌｌｓａ、ａ、”よりなる
角度情報が得られ、この角度情報が第４図Ｃに示す如き
接線ベクトルの時系列ｃ、ｂ、５１％ｈ。Also, in the recognition mode, when the character "2" as shown in Figure 4 is written on the tablet, the time series of tangent vectors c, c, c as shown in Figure 4 E is generated from this character butter/ as described above. ,b,b,a,a,h,hsllsg%g
, '5fsfsfsfsfsllsa,a,'' is obtained, and this angle information is a time series of tangent vectors c, b, 51%h as shown in FIG. 4C.
ｇ％ｆ、ａよりなる角度情報に情報圧縮され、この情報
圧縮された角度情報が入力バター／として標準パターン
メモリ（７）の標準パターンとＤＰマツチング処理され
る。この場合、標準パターン及び入カバターンが共に情
報圧縮されているので、 ＤＰマツチング処理における
マツチング処理の為の演算量を比較的少なくできる。The information is compressed into angle information consisting of g%f, a, and this compressed angle information is subjected to DP matching processing with the standard pattern in the standard pattern memory (7) as input butter. In this case, since the information of both the standard pattern and the input pattern is compressed, the amount of computation for the matching process in the DP matching process can be relatively reduced.
以上述べた如く本例のパターン情報圧縮装置に依れば、
角度情報検出部（１）を有し、この角度情報検出部（１
）の角度情報を情報圧縮部（５）及び類似度検出部（２
）に夫々供給し、類似度検出部（２）に【角度情報間の
類似度を検出し、類似度検出部（２）の検出出力に応じ
て情報圧縮部（５）にて角度情報を情報圧縮するように
した為、パターンより得られる角度情報を有効に情報圧
縮することができる利益がある。As described above, according to the pattern information compression device of this example,
It has an angle information detection section (1), and this angle information detection section (1
) angle information to the information compression unit (5) and the similarity detection unit (2
), and the similarity detection unit (2) detects the degree of similarity between the angle information, and the information compression unit (5) converts the angle information into information according to the detection output of the similarity detection unit (2). Since it is compressed, there is an advantage that the angle information obtained from the pattern can be effectively compressed.
又、上述実施例においては文字パターンよりベクトル抽
出を行なうのに第２図に示す如き単位長４５度違いの８
方向接線ベクトルにてベクトル化するよ５Ｋした場合に
ついて述べたけれども、その他２２．５度違いの１６方
向接線ベクトル、１１．２５度違いの３２方向接線ベク
トル等にてベクトル化するよ５にしても上述実施例と同
様の作用効果を得ることができることは容易に埋屏でき
よう。尚、この場合、類似度検出部（２）における閾値
を接線ベクトルの方向数に応じて２２．５度等適宜な値
に設定することは勿論である。尚、本発明は上述実施例
に限らず本発明の要旨を逸脱することなくその他種々の
構成を取り得ることは勿論である。In addition, in the above embodiment, in order to extract vectors from character patterns, the unit lengths of 8 with a 45 degree difference as shown in FIG. 2 are used.
Although we have described the case of 5K where vectorization is done using directional tangent vectors, it is also possible to vectorize using 16 direction tangent vectors with a difference of 22.5 degrees, 32 direction tangent vectors with a difference of 11.25 degrees, etc. It is easy to see that the same effects as those of the above-mentioned embodiments can be obtained. In this case, it goes without saying that the threshold value in the similarity detection unit (2) is set to an appropriate value such as 22.5 degrees depending on the number of directions of the tangent vector. It goes without saying that the present invention is not limited to the above-described embodiments, and can take various other configurations without departing from the gist of the present invention.
発明の効果 ・
本発明パターン情報圧縮装置に依れば、角度情報検出部
を有し、この角度情報検出部の角度情報を情報圧縮部及
び類似度検出部に夫々供給し、類似度検出部にて角度情
報間の類似度を検出し、類似度検出部の検出出力に応じ
て情報圧縮部にて角度情報を情報圧縮するよ５にした為
、パターンより得られる角度情報を有効に情報圧縮する
ことができる利益がある。Effects of the Invention - According to the pattern information compression device of the present invention, it has an angle information detection section, and supplies the angle information of the angle information detection section to the information compression section and the similarity detection section, respectively. The degree of similarity between the angle information is detected by using the method 5, and the angle information is compressed in the information compression unit according to the detection output of the similarity detection unit.The angle information obtained from the pattern is effectively compressed. There are profits that can be made.
第１図及び第２図は夫々ＤＰマツチング処理の説明に供
する線図、第３図は本発明パターン情報圧縮装置の一実
施例を示す構成図、第４図は第３図の説明に供する線図
である。
（１）は角度情報検出部、（２）は類似度検出部、（５
）は情報圧縮部である
ー、−二ｙ1 and 2 are diagrams for explaining the DP matching process, FIG. 3 is a configuration diagram showing an embodiment of the pattern information compression device of the present invention, and FIG. 4 is a diagram for explaining the diagram in FIG. 3. It is a diagram. (1) is the angle information detection section, (2) is the similarity detection section, (5
) is the information compression part -, -2y
Claims (1)
情報圧縮部及び類似度検出部に夫々供給し、上記類似度
検出部にて上記角度情報間の類似度を検出し、上記類似
度検出部の検出出力に応じて上記情報圧縮部にて上記角
度情報を情報圧縮するようにしたことを特徴とするパタ
ーン情報圧縮装置。It has an angle information detection section, the angle information of the angle information detection section is supplied to an information compression section and a similarity detection section, and the similarity detection section detects the similarity between the angle information, and the similarity detection section detects the similarity between the angle information. A pattern information compression device characterized in that the information compression section compresses the angle information in accordance with the detection output of the degree detection section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15042884A JPS6128181A (en) | 1984-07-19 | 1984-07-19 | Pattern information pressing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15042884A JPS6128181A (en) | 1984-07-19 | 1984-07-19 | Pattern information pressing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6128181A true JPS6128181A (en) | 1986-02-07 |
Family
ID=15496712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15042884A Pending JPS6128181A (en) | 1984-07-19 | 1984-07-19 | Pattern information pressing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6128181A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04336692A (en) * | 1991-05-14 | 1992-11-24 | Sharp Corp | Character recognizing device |
| US6370269B1 (en) | 1997-01-21 | 2002-04-09 | International Business Machines Corporation | Optical character recognition of handwritten or cursive text in multiple languages |
| US7740934B2 (en) | 2005-09-08 | 2010-06-22 | Seiko Epson Corporation | Optical low pass filter |
| US9670119B2 (en) | 2010-07-09 | 2017-06-06 | Celanese International Corporation | Process for producing ethanol using multiple beds each having different catalysts |
-
1984
- 1984-07-19 JP JP15042884A patent/JPS6128181A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04336692A (en) * | 1991-05-14 | 1992-11-24 | Sharp Corp | Character recognizing device |
| US6370269B1 (en) | 1997-01-21 | 2002-04-09 | International Business Machines Corporation | Optical character recognition of handwritten or cursive text in multiple languages |
| US7740934B2 (en) | 2005-09-08 | 2010-06-22 | Seiko Epson Corporation | Optical low pass filter |
| US9670119B2 (en) | 2010-07-09 | 2017-06-06 | Celanese International Corporation | Process for producing ethanol using multiple beds each having different catalysts |
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