JPH10132757A - Inspection method for defect of printed face of cd - Google Patents
Inspection method for defect of printed face of cdInfo
- Publication number
- JPH10132757A JPH10132757A JP8290722A JP29072296A JPH10132757A JP H10132757 A JPH10132757 A JP H10132757A JP 8290722 A JP8290722 A JP 8290722A JP 29072296 A JP29072296 A JP 29072296A JP H10132757 A JPH10132757 A JP H10132757A
- Authority
- JP
- Japan
- Prior art keywords
- teaching
- threshold value
- printed
- inspection
- stage
- 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.)
- Granted
Links
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、コンパクトディス
ク(以下CDと云う。)の、CDレーベルのスクリーン
印刷部の欠陥(ゴミ付着、欠け、ムラ等)を検査する検
査方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection method for inspecting defects (dust adhesion, chipping, unevenness, etc.) on a screen printing portion of a CD label of a compact disk (hereinafter referred to as a CD).
【0002】[0002]
【従来の技術】一般的に、CDには記録内容などを表示
するため、その表面にメーカー名、曲名、演奏者名など
がスクリーン印刷されている(以下CDレーベルと云
う。)。このCDレーベルに欠陥(ゴミ付着、欠け、ム
ラ等)があるか否かを検査するCD印刷面検査装置にお
いて、検査を実施する前に、何枚かのCDを用いて、検
査時に、良品基準となるティ−チング閾値を決定する。2. Description of the Related Art Generally, in order to display recorded contents and the like on a CD, a maker name, a song name, a player name, and the like are screen-printed on the surface thereof (hereinafter, referred to as a CD label). In a CD printing surface inspection device for inspecting whether or not the CD label has a defect (dust adhesion, chipping, unevenness, etc.), before conducting the inspection, using a number of CDs, the quality of the non-defective product is evaluated. Is determined.
【0003】従来、ティーチングは、被検査CDの中か
ら、人手による目視検査により、何枚かの良品基準とな
るティーチングCDを選出して、その基準CDによりテ
ィーチングを実施して、閾値を決定していた。[0003] Conventionally, in teaching, a number of teaching CDs, which are used as standards for non-defective products, are selected by manual visual inspection from CDs to be inspected, teaching is performed using the reference CDs, and a threshold is determined. I was
【0004】[0004]
【発明が解決しようとする課題】従来、ティーチングに
よって閾値を求める場合、一度決定した閾値は、オペレ
ーターがその時の状態を判断して閾値を修正することが
できなかった。検査機は、機械の納入先によって、閾値
の基準が非常に厳しいものから非常に緩いものまで多様
であるとか、また、無限に存在するCDレーベルの絵柄
に対して対応しなければならないため、初期に設定した
ティーチング閾値の範囲では、対応しきれなく、良品の
CDであるにもかかわらず不良品として判定しまう場合
があった。Conventionally, when a threshold value is obtained by teaching, once a threshold value has been determined, it has not been possible for an operator to judge the state at that time and correct the threshold value. Inspection machines must be able to handle the threshold criteria that vary from very strict to very loose, depending on the destination of the machine, and must deal with the infinite number of CD label patterns. In the range of the teaching threshold value set as described above, there is a case where it is not possible to cope with the defective CD and it is determined that the CD is defective even though it is a good CD.
【0005】[0005]
【課題を解決するための手段】上記問題点を解決するた
めに本発明は、最初のティ−チングで得られた初期ティ
ーチング閾値を、被検査CDの印刷面の画像変化に対応
させ、補正することができるものである。In order to solve the above-mentioned problems, the present invention corrects an initial teaching threshold value obtained in the first teaching in accordance with a change in the image on the printing surface of the CD to be inspected. Is what you can do.
【0006】[0006]
【発明の実施の形態】本発明は、初期ティーチング値
を、CDレーベルの画像変化に応じて、オペレータがそ
の時の状態を判断して閾値を補正するもので、その補正
後のティーチング閾値は、Y=aX+b(Y:補正後の
ティーチング閾値、X:初期ティーチング閾値、a,b
補正係数)の1次式にて求めることができる。According to the present invention, an initial teaching value is corrected by an operator in accordance with an image change of a CD label by judging a state at that time, and a corrected teaching threshold is Y. = AX + b (Y: Teaching threshold after correction, X: Initial teaching threshold, a, b
(Correction coefficient).
【0007】[0007]
【実施例】第1図は本発明における、CD等の多色刷り
印刷機に設置された印刷物検査装置での実施例を示す。
印刷機のターンテーブル(21)上に配設されたCD搬
送トレイ(22)に、投入ステージ(23)より投入さ
れるCD(24)は、搬送方向gに、第1色印刷ステー
ジ(25)、第2色印刷ステージ(26)と順次印刷さ
れ、第3色印刷ステージ(27)で印刷は完了し、排出
ステージ(29)の直前の検査ステージ(28)におい
て、検査ステージ(28)上に設置されたエリアカメラ
(20)でCD(24)の印刷画像を撮影し、画像処理
装置(31)にて印刷欠陥を判別する。FIG. 1 shows an embodiment of the present invention in a printed matter inspection apparatus installed in a multicolor printing press for CDs and the like.
The CD (24) loaded from the loading stage (23) into the CD transport tray (22) disposed on the turntable (21) of the printing machine is moved in the transport direction g in the first color printing stage (25). , The second color printing stage (26) is sequentially printed, the printing is completed in the third color printing stage (27), and the inspection stage (28) immediately before the discharge stage (29) is placed on the inspection stage (28). A print image of the CD (24) is taken by the installed area camera (20), and a print defect is determined by the image processing device (31).
【0008】第2図は、本発明の原理を説明するフロー
チャートである。FIG. 2 is a flow chart for explaining the principle of the present invention.
【0009】図2のフローチャートは、本発明における
ティーチングの流れを説明したもので、図面に沿って説
明すると、所定のCD印刷面欠陥検査を開始する前に、
何事もなく印刷が完了した何枚かの被検査CDを、エリ
アカメラ(20)で撮像し、一定の画像処理を施し、初
期ティーチング閾値Xを決定する(1)。この初期ティ
ーチング閾値Xを用いてCDレーベルの印刷欠陥検査を
開始する(2)。検査の流れの中で、CDレーベルの印
刷状態をオペレータが判断して、補正係数a,bを決定
し、下記1次式にて、初期ティーチング閾値に対して補
正をかける(4)。FIG. 2 is a flow chart for explaining the flow of teaching in the present invention. Referring to the drawings, before starting a predetermined CD printed surface defect inspection,
An image of several CDs to be inspected, which has been printed without incident, is taken by the area camera (20), subjected to a certain image processing, and an initial teaching threshold value X is determined (1). Using this initial teaching threshold value X, a print defect inspection of the CD label is started (2). In the inspection flow, the operator determines the printing state of the CD label, determines correction coefficients a and b, and corrects the initial teaching threshold by the following linear equation (4).
【0010】 Y=aX+b X:初期ティーチング閾値 Y:補正後のティーチング閾値 a,b:補正計数 上式の補正計数a,bは、CDレーベルの画像変化に応
じて決定され、オペレータにより入力される(3)。Y = aX + b X: Initial teaching threshold Y: Corrected teaching threshold a, b: Correction count The correction counts a and b in the above formula are determined according to the image change of the CD label and input by the operator. (3).
【0011】そして、その後の検査工程は、上記補正に
より決定した新ティーチング閾値を使用して行われる。The subsequent inspection process is performed using the new teaching threshold determined by the above correction.
【0012】[0012]
【発明の効果】本発明は、以上説明したような形態で実
施され、以下に記載されるような効果を奏する。The present invention is embodied in the form described above and has the following effects.
【0013】ティーチングによって得られた初期ティー
チング閾値に対して補正をかけることによって、柔軟に
ティーチング閾値を補正することができ、CDの不良率
を減少させることができる。By correcting the initial teaching threshold value obtained by the teaching, the teaching threshold value can be flexibly corrected, and the defect rate of the CD can be reduced.
【図1】本発明における一実施例で、CD印刷面検査装
置に使用した主要な構成を示す概略構成図である。FIG. 1 is a schematic configuration diagram showing a main configuration used in a CD printing surface inspection apparatus in one embodiment of the present invention.
【図2】本発明の原理を説明するフローチャート図であ
るFIG. 2 is a flowchart illustrating the principle of the present invention.
24 被検査CD 30 CD印刷面検査装置 X 初期ティーチング閾値 Y 補正後のティーチング閾値 a,b 補正計数 24 CD to be inspected 30 CD printed surface inspection device X Initial teaching threshold Y Teaching threshold after correction a, b Correction count
Claims (1)
前に、あらかじめ何枚かのCDを用いてティーチングを
行い、被検査CDの良品基準となるティーチング閾値を
決定するCD印刷面検査装置において前記ティ−チング
で得られた初期ティーチング閾値を、被検査CDの印刷
面の画像変化に対応させ、補正可能としたことを特徴と
するCD印刷面の欠陥検査方法。1. An inspection method for inspecting a printed surface of a CD to be inspected before inspecting an image defect on the printed surface of the CD to determine a teaching threshold value serving as a non-defective standard of the inspected CD. A defect inspection method for a printed surface of a CD, wherein the initial teaching threshold value obtained by the teaching in the apparatus can be corrected in accordance with an image change on the printed surface of the CD to be inspected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29072296A JP3258920B2 (en) | 1996-10-31 | 1996-10-31 | Inspection method for CD printed surface |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29072296A JP3258920B2 (en) | 1996-10-31 | 1996-10-31 | Inspection method for CD printed surface |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10132757A true JPH10132757A (en) | 1998-05-22 |
JP3258920B2 JP3258920B2 (en) | 2002-02-18 |
Family
ID=17759686
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP29072296A Expired - Fee Related JP3258920B2 (en) | 1996-10-31 | 1996-10-31 | Inspection method for CD printed surface |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3258920B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011121331A (en) * | 2009-12-14 | 2011-06-23 | Sharp Corp | Printer and inspection method |
-
1996
- 1996-10-31 JP JP29072296A patent/JP3258920B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011121331A (en) * | 2009-12-14 | 2011-06-23 | Sharp Corp | Printer and inspection method |
Also Published As
Publication number | Publication date |
---|---|
JP3258920B2 (en) | 2002-02-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |