JPH0812698B2 - Parts character inspection device - Google Patents
Parts character inspection deviceInfo
- Publication number
- JPH0812698B2 JPH0812698B2 JP2090550A JP9055090A JPH0812698B2 JP H0812698 B2 JPH0812698 B2 JP H0812698B2 JP 2090550 A JP2090550 A JP 2090550A JP 9055090 A JP9055090 A JP 9055090A JP H0812698 B2 JPH0812698 B2 JP H0812698B2
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- Japan
- Prior art keywords
- character
- dictionary data
- character string
- pattern
- integrated
- 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.)
- Expired - Lifetime
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- Image Processing (AREA)
- Character Discrimination (AREA)
- Image Analysis (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、部品文字検査に係り、特に、辞書データを
もち、部品に捺印されている文字列と照合し良否を判定
するのに好適な部品文字検査装置に関する。The present invention relates to a part character inspection, and in particular, is suitable for judging whether a part has a dictionary data and is compared with a character string imprinted on a part to judge whether the part is good or bad. A part character inspection device.
従来の部品文字検査装置においては、被検査部品の文
字列を位置決め良否判定する場合、１文字毎の辞書で被
検査部品の文字列の位置決め良否判定を行っていた。
（第７図参照） 文字検査の公知例としては、メカトロシステム事典
（産業調査会出版）、昭和57.8.1発行,P486〜P487のb.
パターンの探索の欄に記載されており、ａのパターンに
変えてｔのパターンで入力画像全体にパターンマッチン
グをかける場合が提案される。In the conventional component character inspection apparatus, when the character string of the inspected component is judged to be good or bad for positioning, the character string of the character string of the inspected part is judged to be good or bad for positioning.
(See Fig. 7) As a publicly known example of character inspection, refer to Mechatronics System Encyclopedia (published by the Industrial Research Institute), published on 57.8.1, Showa 57, P486-P487.
It is described in the field of pattern search, and it is proposed that pattern matching is applied to the entire input image with the pattern of t instead of the pattern of a.
従来の技術の照合処理における問題点を第７図により
説明する。第７図のように右端の文字２が少し上にずれ
た同一文字を含む文字列30が印刷された被検査部品29の
文字画像に対し、文字２の辞書データ23を第１ウィンド
ウ24の範囲で、辞書移動方向25の方向にパターンマッチ
ングしてゆくと、同一文字を含む文字列30の先頭文字の
２に位置決めせず、右端の文字の２に位置決めしてしま
う。この結果を判定部へ送り、照合判定は一致。次に、
前記文字画像に対し、第２ウィンドウ26の範囲で、文字
５の辞書データ27を辞書移動方向25の方向にパターンマ
ッチングさせると、文字なしのため、位置決めしない。
この結果を判定部へ送り、照合判定は不一致となる。最
後に、前記文字画像に対し、第３ウィンドウ28の範囲
で、文字２の辞書データ23を辞書移動方向25の方向にパ
ターンマッチングして、これも文字なしのため、位置決
めしない。この結果を判定部へ送り、照合判定は不一致
となる。結局、判定は不一致となる。Problems in the conventional matching process will be described with reference to FIG. As shown in FIG. 7, with respect to the character image of the inspected part 29 on which the character string 30 including the same character with the rightmost character 2 slightly shifted upward is printed, the dictionary data 23 of the character 2 is displayed in the range of the first window 24. When pattern matching is performed in the direction of the dictionary movement direction 25, the character string 30 including the same character is not positioned at the first character 2 but at the rightmost character 2. This result is sent to the judgment section, and the collation judgment is coincident. next,
When the dictionary data 27 of the character 5 is pattern-matched with the character image in the direction of the dictionary movement direction 25 within the range of the second window 26, there is no character so that the character image is not positioned.
This result is sent to the determination unit, and the collation determination is a mismatch. Finally, with respect to the character image, the dictionary data 23 of the character 2 is pattern-matched in the direction of the dictionary movement direction 25 within the range of the third window 28, and since there is also no character, no positioning is performed. This result is sent to the determination unit, and the collation determination is a mismatch. After all, the judgments do not match.
このように、良品を不良品と判定する問題がある。 As described above, there is a problem that a good product is determined as a defective product.
従来の部品文字検査装置にあっては、１文字ごとの辞
書データを使って、文字列の自動検査を行うと、印刷文
字がずれている時は、間違った位置の文字を照合判定す
るため、文字列の照合順序がずれて誤検出を起こすこと
があった。In the conventional component character inspection device, when the character string is automatically inspected by using the dictionary data for each character, when the printed character is misaligned, the character at the wrong position is collated and determined. Occasionally, the collating sequence of the character strings was out of order, resulting in erroneous detection.
また、文字列中の文字の数が多いと、文字照合回数が
増え、検査時間が長くなる問題があった。In addition, when the number of characters in the character string is large, the number of times of character matching increases and there is a problem that the inspection time becomes long.
本発明の目的は、文字列を一体形辞書データと比較照
合して良否判定し、文字列の認識率と検査速度を向上
し、かつ辞書メモリを低減する部品文字検査装置を提供
することにある。An object of the present invention is to provide a component character inspection device that compares and collates a character string with integrated dictionary data to determine pass / fail, improves the character string recognition rate and inspection speed, and reduces the dictionary memory. .
前記の目的を達成するため、本発明に係る部品文字検
査装置は、被検査部品に捺印された複数文字からなる文
字列を、予め登録された辞書データと照合して良否判定
する部品文字検査装置において、登録された１文字ごと
の前記辞書データから前記文字列に応じて複数文字から
なる細線化された一体形辞書データを生成するパターン
発生回路と、該一体形辞書データと前記文字列とを文字
列単位で比較照合するパターン照合回路とを設けた構成
とする。In order to achieve the above-mentioned object, a component character inspection device according to the present invention is a component character inspection device for determining a quality by comparing a character string composed of a plurality of characters stamped on a component to be inspected with dictionary data registered in advance. In the above, a pattern generation circuit for generating thin-line integrated dictionary data composed of a plurality of characters from the registered dictionary data for each character, and the integrated dictionary data and the character string are provided. A pattern matching circuit for comparing and matching in character string units is provided.
また、一体形辞書データは、テレビカメラで入力しモ
ニターテレビに映し出された文字画像を用いて１文字ご
との辞書データを予め登録し、文字列に応じて前記辞書
データから生成される構成でも良い。Further, the integrated dictionary data may be configured such that dictionary data for each character is registered in advance by using a character image input by a TV camera and displayed on a monitor TV, and is generated from the dictionary data according to a character string. .
そして一体形辞書データを、文字列の画像にパターン
マッチグさせて比較照合する構成でも良い。Then, the integrated dictionary data may be pattern-matched with the image of the character string for comparison and collation.
〔作用〕 本発明の部品文字検査装置によれば、被検査部品に捺
印された文字列は、一体形辞書データと比較照合される
ため、文字の印刷ずれがあっても、文字列の位置決めミ
スを起さず、照合回数は１回のみでよくなる。[Operation] According to the component character inspection apparatus of the present invention, the character string imprinted on the inspected component is compared and collated with the integrated dictionary data, so that even if there is a character print misalignment, the character string is mispositioned. Does not occur, and the number of times of matching is only one.
また一体形辞書データは、１文字ごとに登録された辞
書データから生成されるため、文字列ごとに辞書データ
を登録しておく必要がなくなる。Moreover, since the integrated dictionary data is generated from the dictionary data registered for each character, it is not necessary to register the dictionary data for each character string.
本発明の一実施例を第１図及び第２図を参照しながら
説明する。An embodiment of the present invention will be described with reference to FIGS. 1 and 2.
第１図に示す矢印（２本線図示）40は、平面情報デー
タの流れを表わし、矢印（１本線図示）41は数値情報デ
ータの流れを表わす。そして画像処理装置の内部構成42
は破線で示す。An arrow (illustrated by two main lines) 40 shown in FIG. 1 represents a flow of plane information data, and an arrow (illustrated by one main line) 41 represents a flow of numerical information data. The internal structure of the image processing apparatus 42
Is indicated by a broken line.
被検査部品29に捺印された少なくとも１文字よりなる
文字列30を、予め登録された辞書データと照合して良否
判定する部品文字検査装置は、登録された１文字ごとの
辞書データから文字列30に応じて少なくとも１文字の一
体形辞書データを生成するパターン発生回路19と、一体
形辞書データと文字列とを比較照合するパターン照合回
路21とを設けた構成からなる。A component character inspection device for judging a quality by comparing a character string 30 made up of at least one character imprinted on a part to be inspected 29 with previously registered dictionary data is a character string 30 from the registered dictionary data for each character. In accordance with the above, a pattern generation circuit 19 for generating at least one character of the integrated dictionary data and a pattern matching circuit 21 for comparing and matching the integrated dictionary data and the character string are provided.
まず、辞書データを登録する場合は、被検査文字（文
字列）１の画像をTVカメラ２により入力し、多値メモリ
３に格納する。これをA/D（アナログ／ディジタル）変
換回路４に通し、２値メモリ５におとし、細線化回路６
で細線化し、２値メモリ７に格納する。これを投影分布
抽出回路８に通し、Ｘ軸投影分布９及びＹ軸投影分布10
を抽出し、これらからパターン中心間隔検出11、中心位
置X1,X2,X3検出12,中心位置Y1検出13を行なう。こうし
て検出した中心位置情報と２値メモリ７とをメモリ探索
回路14に通し、各パターンのドット位置検出15を行な
う。こうして得られたパターンのデータ及び中心間隔情
報を辞書データとしてデータ格納F/D（フロッピーディ
スク）装置16に登録する。以下、０〜９までの辞書デー
タを全部登録するまで前記処理を繰り返す。First, when registering the dictionary data, the image of the character (character string) 1 to be inspected is input by the TV camera 2 and stored in the multi-valued memory 3. This is passed through the A / D (analog / digital) conversion circuit 4 and stored in the binary memory 5, and the thinning circuit 6
The line is thinned by and stored in the binary memory 7. This is passed through the projection distribution extraction circuit 8, and the X-axis projection distribution 9 and the Y-axis projection distribution 10
Are extracted, and pattern center interval detection 11, center positions X 1 , X 2 , X 3 detection 12 and center position Y 1 detection 13 are performed. The center position information thus detected and the binary memory 7 are passed through the memory search circuit 14 to detect the dot position 15 of each pattern. The pattern data and center interval information thus obtained are registered in the data storage F / D (floppy disk) device 16 as dictionary data. Hereinafter, the above process is repeated until all the dictionary data of 0 to 9 are registered.
次に、一体形辞書データを生成する場合は、予めデー
タ格納F/D装置16より主メモリ18へすべて（０〜９）の
辞書データ（パターンのデータ及びパターン中心間隔情
報）を転送しておく。次に文字列情報17（例えば252）
が主メモリ18に与えられると、その情報に従い、主メモ
リ18からパターン発生回路19に必要な辞書情報（例え
ば、２と５のパターンデータ及びパターン中心間隔デー
タ）を送り、本発明の一体形辞書データ（例えば、25
2）のパターンを生成する。Next, when the integrated dictionary data is generated, all (0-9) dictionary data (pattern data and pattern center interval information) is transferred from the data storage F / D device 16 to the main memory 18 in advance. . Next, the character string information 17 (eg 252)
Is supplied to the main memory 18, the necessary dictionary information (for example, the pattern data of 2 and 5 and the pattern center interval data) is sent from the main memory 18 to the pattern generating circuit 19 in accordance with the information, and the integrated dictionary of the present invention. Data (eg 25
2) Generate the pattern.
一方、被検査文字の画像と辞書データの照合を行う場
合は、前記のようにパターン発生回路19に一体形辞書デ
ータを生成しておき、（生成は、反転型にも縦型にもで
きる）被検査文字１の画像をTVカメラ２により入力し、
多値メモリ３に格納する。これをA/D変換回路４に通
し、２値メモリ５におとし、ウィンドウ設定回路20で照
合すべき範囲にウィンドウを設定する。次にウィンドウ
を設定された２値画像及びパターン発生回路19に生成さ
れている一体形辞書データをパターン照合回路21に送っ
て比較照合を行い、結果を判定部22に送り、一致または
不一致の判定が行われる。On the other hand, when collating the image of the character to be inspected with the dictionary data, the integrated dictionary data is generated in the pattern generation circuit 19 as described above (the generation can be inverted or vertical). Input the image of the inspected character 1 with the TV camera 2,
Store in the multi-valued memory 3. This is passed through the A / D conversion circuit 4, stored in the binary memory 5, and the window setting circuit 20 sets the window in the range to be collated. Next, the binary image for which the window is set and the integrated dictionary data generated in the pattern generation circuit 19 are sent to the pattern matching circuit 21 for comparison and matching, and the result is sent to the judging unit 22 to judge whether they match or not match. Is done.
次にパターン照合回路21の中で行われる照合処理及び
判定部22で行われる判定処理を、第３図により説明す
る。Next, the matching process performed in the pattern matching circuit 21 and the determination process performed in the determination unit 22 will be described with reference to FIG.
右端の文字２が少し上にずれた同一文字を含む文字列
30が印刷された被検査部品29の文字画像に対し、第１ウ
ィンドウ24がかけられた画像と、パターン発生回路19で
生成した文字２と５と２とを組合わせた３文字の一体形
辞書データ31とがパターン照合回路21に入っている。こ
こで、一体形辞書データ31を第１ウィンドウ24の範囲
で、辞書移動方向25の方向にパターンマッチングしてゆ
くと、文字ずれに影響されず位置決めする。この結果を
判定部22へ送り、照合判定は一致となる。このように、
良品を良品と確実に判断できる。A character string that contains the same character with the rightmost character 2 slightly shifted up
A three-character integrated dictionary in which the character image of the inspected part 29 on which 30 is printed is combined with the image of the first window 24 and the characters 2, 5 and 2 generated by the pattern generation circuit 19 are combined. The data 31 and the pattern matching circuit 21 are stored in the pattern matching circuit 21. Here, if pattern matching is performed on the integrated dictionary data 31 in the direction of the dictionary movement direction 25 within the range of the first window 24, positioning is performed without being affected by character shift. This result is sent to the determination unit 22, and the collation determination is a match. in this way,
You can definitely judge good products as good products.
また、文字照合回数が１回のみであり、辞書数が１文
字だけの辞書データで10種のみである（照合前に、文字
列情報から一体形辞書データを生成するため、組合せ文
字辞書不要）ため、検査時間の低減と辞書メモリの節約
に効果がある。In addition, the number of times the character is collated is only once, and the number of dictionaries is only 10 in the dictionary data (only one type is required, because the integrated dictionary data is generated from the character string information before collation). Therefore, it is effective in reducing the inspection time and saving the dictionary memory.
次に本発明の他の実施例を第４図及び５図を参照しな
がら説明する。Next, another embodiment of the present invention will be described with reference to FIGS.
第４図は、文字列が反転した場合の例で、反転した文
字列30が印刷された被検査部品29の文字画像に対し、第
１ウィンドウ24がかけられた画像と、パターン発生回路
19で反転させて生成した反転一体形辞書データ32とがパ
ターン照合回路21に入っている。ここで、反転一体形辞
書データ32を第１ウィンドウ24の範囲で、辞書移動方向
25の方向にパターンマッチングしてゆくと、位置決めす
る。この結果を判定部22へ送り、照合判定は一致とな
る。FIG. 4 shows an example in which the character string is reversed. An image obtained by applying the first window 24 to the character image of the inspected part 29 on which the reversed character string 30 is printed and the pattern generation circuit are shown.
The pattern matching circuit 21 contains the reverse integrated dictionary data 32 generated by reversing at 19. Here, the reverse integrated dictionary data 32 is moved in the dictionary moving direction within the range of the first window 24.
Positioning is performed by pattern matching in 25 directions. This result is sent to the determination unit 22, and the collation determination is a match.
第５図は文字列が縦になった場合の例で、第１ウィン
ドウ24がかけられた画像とパターン発生回路19で縦型に
生成した縦型一体形辞書データ33がパターン照合回路21
に入っている。ここで、縦型一体形辞書データ33を第１
ウィンドウ24の範囲で、辞書移動方向25の方向にパター
ンマッチングしてゆくと、位置決めする。この結果を判
定部22へ送り、照合判定は一致となる。FIG. 5 shows an example in which the character string is in a vertical direction. The image on which the first window 24 is applied and the vertical integrated dictionary data 33 vertically generated by the pattern generating circuit 19 are the pattern matching circuit 21.
Is in. Here, the vertical integrated dictionary data 33
Positioning is performed by performing pattern matching in the dictionary movement direction 25 within the range of the window 24. This result is sent to the determination unit 22, and the collation determination is a match.
第６図は、部品文字検査装置の他の実施例である。 FIG. 6 shows another embodiment of the component character inspection device.
電子部品などが搭載されたプリント基板34を、XYテー
ブル35によりテレビカメラと照明とで構成される光学系
36の下に位置決めし、電子部品の表面に捺印されている
文字列の画像を入力し、画像処理装置39に登録しておい
た一体形辞書データを使って、文字列の良否判定検査を
画像処理装置39により行ない、結果をプリンタ37および
コンソールCRT38に出力する。An optical system that consists of a TV camera and lighting with an XY table 35 on a printed circuit board 34 on which electronic components are mounted.
Positioned below 36, input the image of the character string imprinted on the surface of the electronic component, and use the integrated dictionary data registered in the image processing device 39 to image the pass / fail judgment inspection of the character string. It is performed by the processing device 39, and the result is output to the printer 37 and the console CRT 38.
なお一体形辞書データは、テレビカメラで入力しモニ
ターテレビに映し出された文字画像を用いて１文字ごと
の辞書データを予め登録し、この辞書データから生成さ
れている構成でも良い。The integrated dictionary data may have a configuration in which dictionary data for each character is registered in advance using a character image input by a TV camera and displayed on a monitor TV, and is generated from this dictionary data.
またそれぞれの実施例において、文字列は、同一文字
を含まない構成か、少なくとも２文字が同一文字、又は
少なくとも４文字が少なくとも２種類の同一文字よりな
る構成でも良い。Further, in each embodiment, the character string may not include the same character, or at least two characters may be the same character, or at least four characters may be at least two kinds of the same character.
本発明により、被検査部品の文字列の良否判定検査に
おいて文字の印刷がずれていても、文字の位置決めを確
実に、かつ高速に行えるため、プリント板に搭載される
電子部品の定数及び型式の捺印文字自動検査の認識率が
従来の90％から99.9％に向上し、検査速度が従来の約２
倍に向上し、さらに辞書メモリが約50％低減される効果
がある。According to the present invention, even if the printing of the character is misaligned in the quality judgment inspection of the character string of the inspected component, the character can be positioned reliably and at high speed. The recognition rate for automatic marking character inspection has improved from 90% in the past to 99.9%, and the inspection speed is about 2 in the past.
The effect is that the dictionary memory is doubled and the dictionary memory is reduced by about 50%.
本発明の部品文字検査装置によれば、被検査部品の文
字列の文字がずれていても、文字の位置決めが確実に高
速に行えるため、文字列の認識率及び検査速度が著しく
向上し、辞書メモリも低減できる効果がある。According to the component character inspection apparatus of the present invention, even if the characters in the character string of the inspected component are misaligned, the character can be positioned reliably and at high speed, so the recognition rate of the character string and the inspection speed are significantly improved, and the dictionary It also has the effect of reducing the memory.
第１図は本発明の一実施例を示す構成図、第２図は本実
施例の動作を表わす図、第３図は本実施例の一体形辞書
データを使った文字位置決めを説明する図、第４図及び
第５図は本発明の他の実施例を示す図、第６図は本発明
の他の実施例の装置を示す斜視図、第７図は従来の技術
を説明する図である。 １……被検査文字、19……パターン発生回路、 21……パターン照合回路、 30……文字列、31……一体形辞書データ。FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing the operation of the present embodiment, and FIG. 3 is a diagram for explaining character positioning using the integrated dictionary data of the present embodiment, 4 and 5 are views showing another embodiment of the present invention, FIG. 6 is a perspective view showing an apparatus of another embodiment of the present invention, and FIG. 7 is a view explaining a conventional technique. . 1 ... Inspected character, 19 ... Pattern generation circuit, 21 ... Pattern matching circuit, 30 ... Character string, 31 ... Integrated dictionary data.
Claims (3)
文字列を、予め登録された辞書データと照合して良否判
定する部品文字検査装置において、 登録された１文字ごとの前記辞書データから前記文字列
に応じて複数文字からなる細線化された一体形辞書デー
タを生成するパターン発生回路と、 該一体形辞書データと前記文字列とを文字列単位で比較
照合するパターン照合回路とを設けたことを特徴とする
部品文字検査装置。1. A component character inspection apparatus for determining a quality by comparing a character string composed of a plurality of characters stamped on a component to be inspected with previously registered dictionary data, from the registered dictionary data for each character. A pattern generation circuit for generating thin-lined integrated dictionary data composed of a plurality of characters according to the character string and a pattern matching circuit for comparing and matching the integrated dictionary data and the character string in character string units are provided. The character inspection device for parts.
しモニターテレビに映し出された文字画像を用いて１文
字ごとの辞書データを予め登録し、文字列に応じて前記
辞書データから生成されることを特徴とする請求項１記
載の部品文字検査装置。2. The integrated dictionary data is generated from the dictionary data according to a character string by previously registering the dictionary data for each character using a character image input by a TV camera and displayed on a monitor TV. The component character inspection device according to claim 1, wherein
ーンマッチグさせて比較照合することを特徴とする請求
項１または２記載の部品文字検査装置。3. The component character inspection apparatus according to claim 1, wherein the integrated dictionary data is subjected to pattern matching with an image of a character string to compare and collate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2090550A JPH0812698B2 (en) | 1990-04-05 | 1990-04-05 | Parts character inspection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2090550A JPH0812698B2 (en) | 1990-04-05 | 1990-04-05 | Parts character inspection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03288973A JPH03288973A (en) | 1991-12-19 |
| JPH0812698B2 true JPH0812698B2 (en) | 1996-02-07 |
Family
ID=14001524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2090550A Expired - Lifetime JPH0812698B2 (en) | 1990-04-05 | 1990-04-05 | Parts character inspection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0812698B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW411430B (en) * | 1995-07-25 | 2000-11-11 | Komatsu Mfg Co Ltd | Inspection baseline entry method and its equipment for character inspection device |
| JP6166705B2 (en) * | 2014-09-29 | 2017-07-19 | セコム株式会社 | Object identification device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62169289A (en) * | 1986-01-22 | 1987-07-25 | Hitachi Ltd | Optical character reader |
| JPS62281081A (en) * | 1986-05-30 | 1987-12-05 | Toppan Printing Co Ltd | Public lottery belting inspection device |
-
1990
- 1990-04-05 JP JP2090550A patent/JPH0812698B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03288973A (en) | 1991-12-19 |
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