JPS62192245U - - Google Patents
Info
- Publication number
- JPS62192245U JPS62192245U JP8059886U JP8059886U JPS62192245U JP S62192245 U JPS62192245 U JP S62192245U JP 8059886 U JP8059886 U JP 8059886U JP 8059886 U JP8059886 U JP 8059886U JP S62192245 U JPS62192245 U JP S62192245U
- Authority
- JP
- Japan
- Prior art keywords
- change
- value
- disabling
- point
- pixel
- 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
- 230000007547 defect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims 7
- 230000002950 deficient Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Description
第１図は本考案の一実施例を示すブロツク図、
第２図はビデオ信号波形例、第３図は他の実施例
を示すブロツク図である。
１，２１……被検査物、２……光源、３……反
射光、４……カメラ、５……アナログビデオ信号
、６……レンズ、７……欠陥凹部、８……Ａ／Ｄ
変換器、９……シフトレジスタ、１０，１１……
引き算回路、１２，１４，１８……判定値スイツ
チ、１３，１５，１９……比較器、１６……フリ
ツプフロツプ回路（ＦＦ）、１７……ラツチ回路
、２０……間隔判定回路、２２……欠陥凸部。
FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a video signal waveform example, and FIG. 3 is a block diagram showing another embodiment. 1, 21...Object to be inspected, 2...Light source, 3...Reflected light, 4...Camera, 5...Analog video signal, 6...Lens, 7...Defect recess, 8...A/D
Converter, 9...Shift register, 10, 11...
Subtraction circuit, 12, 14, 18... Judgment value switch, 13, 15, 19... Comparator, 16... Flip-flop circuit (FF), 17... Latch circuit, 20... Interval judgment circuit, 22... Defect Convex part.
Claims (1)
素前の画素値間のレベル差を逐一検出するととも
に、そのレベル差の一方の変化方向における値と
第１の所定値とを比較して変化開始点の画素位置
を検出し、他方の変化方向における値と第２の所
定値を比較して変化終了点の画素位置を検出する
変化点検出手段と；前記変化開始点の画素位置と
前記変化終了点の画素位置間の画素数に対応する
幅を検出する欠陥部幅検出手段と；前記変化開始
点の画素位置検出に応答して画素数を計数し、そ
の計数値が前記変化終了点の画素位置検出以前に
所定の間隔判定値を超えた時前記欠陥部幅検出手
段の動作を無効にする無効手段と；前記欠陥部幅
検出手段が検出した幅が第３の所定値を超えたこ
とをもつて欠陥部ありと判定する判定手段と；を
備えたことを特徴とする欠陥検出装置。 The level difference between the current pixel value and the previous pixel value in the captured image of the object to be inspected is detected one by one, and the value of the level difference in one direction of change is compared with a first predetermined value to start the change. a change point detection means for detecting a pixel position of a point, and detecting a pixel position of a change end point by comparing a value in the other change direction with a second predetermined value; a pixel position of the change start point and the change end point; defect width detection means for detecting a width corresponding to the number of pixels between the pixel positions of the points; counting the number of pixels in response to the detection of the pixel position of the change start point; Disabling means for disabling the operation of the defect width detection means when a predetermined interval judgment value is exceeded before position detection; disabling means for disabling the operation of the defect width detection means; 1. A defect detection device comprising: determination means for determining that there is a defective portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8059886U JPH0543372Y2 (en) | 1986-05-28 | 1986-05-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8059886U JPH0543372Y2 (en) | 1986-05-28 | 1986-05-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62192245U true JPS62192245U (en) | 1987-12-07 |
| JPH0543372Y2 JPH0543372Y2 (en) | 1993-11-01 |
Family
ID=30931547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8059886U Expired - Lifetime JPH0543372Y2 (en) | 1986-05-28 | 1986-05-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0543372Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01212305A (en) * | 1988-02-19 | 1989-08-25 | Fuji Photo Film Co Ltd | Method and apparatus for detecting connection |
-
1986
- 1986-05-28 JP JP8059886U patent/JPH0543372Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01212305A (en) * | 1988-02-19 | 1989-08-25 | Fuji Photo Film Co Ltd | Method and apparatus for detecting connection |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0543372Y2 (en) | 1993-11-01 |
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