JPH0354931U - - Google Patents
Info
- Publication number
- JPH0354931U JPH0354931U JP11669089U JP11669089U JPH0354931U JP H0354931 U JPH0354931 U JP H0354931U JP 11669089 U JP11669089 U JP 11669089U JP 11669089 U JP11669089 U JP 11669089U JP H0354931 U JPH0354931 U JP H0354931U
- Authority
- JP
- Japan
- Prior art keywords
- platen cover
- detection device
- boundary point
- document
- original
- 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
- 238000001514 detection method Methods 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Length Measuring Devices By Optical Means (AREA)
- Holders For Sensitive Materials And Originals (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
Description
第１図Ａ，Ｂ，Ｃ，Ｄは本考案の原稿サイズ検
知装置の一実施例の構成を示す回路図、第２図は
複写機の画像処理部における原稿サイズ検知回路
の配置の一例を示すブロツク図、第３図Ａは濃度
の差分を用いた主走査方向のサイズ検知を示す説
明図、第３図Ｂは正常検知及び誤検知を示す説明
図である。
符号の説明、１００……ＤＦ／Ｆ（領域外信号
補正手段）、１００ａ……ＯＲ回路、１０１……
コンパレータ、１０２……ＤＦ／Ｆ・ＡＮＤゲー
ト、１０８……カウンタ、１０９……セレクタ、
１１０……ＤＦ／Ｆ、１１１……コンパレータ、
１１２……セレクタ、１１３……ＤＦ／Ｆ、１１
５……イネーブルカウンタ、１１６……コンパレ
ータ、１１７，１１８，１１９，１２０……ＤＦ
／Ｆ、１２１……ＡＮＤゲート、１２２……カウ
ンタ、１２３……セレクタ、１２４……ＤＦ／Ｆ
、１２５……ＤＦ／Ｆ、１２６……分周カウンタ
、１２７，１３１……セレクタ、１２８，１３２
……コンパレータ、１２９，１３３……ＥＯＲ回
路、１３０，１３４……ＤＦ／Ｆ、１３５……Ｆ
ＩＦＯ、１３６……クロツク遅延回路、１３７…
…クロツク発生回路、１３８，１３９……コンパ
レータ、１４０，１４１……シフトレジスタ、２
００……原稿サイズ検知回路（原稿サイズ検知装
置）。
Figures 1A, B, C, and D are circuit diagrams showing the configuration of an embodiment of the original size detection device of the present invention, and Figure 2 shows an example of the arrangement of the original size detection circuit in the image processing section of a copying machine. FIG. 3A is an explanatory diagram showing size detection in the main scanning direction using density difference, and FIG. 3B is an explanatory diagram showing normal detection and false detection. Explanation of symbols, 100...DF/F (outside area signal correction means), 100a...OR circuit, 101...
Comparator, 102...DF/F/AND gate, 108...Counter, 109...Selector,
110...DF/F, 111...Comparator,
112...Selector, 113...DF/F, 11
5... Enable counter, 116... Comparator, 117, 118, 119, 120... DF
/F, 121...AND gate, 122...Counter, 123...Selector, 124...DF/F
, 125... DF/F, 126... Frequency division counter, 127, 131... Selector, 128, 132
...Comparator, 129,133...EOR circuit, 130,134...DF/F, 135...F
IFO, 136...Clock delay circuit, 137...
... Clock generation circuit, 138, 139 ... Comparator, 140, 141 ... Shift register, 2
00... Original size detection circuit (original size detection device).
補正 平１．１２．２１
図面の簡単な説明を次のように補正する。
明細書の第２０頁第１２行に記載の「第１図Ａ
，Ｂ，Ｃ，Ｄは」を「第１図Ａ，Ｂ，Ｃ，Ｄ，Ｅ
は」と訂正する。Amendment 1.12.21. The brief description of the drawing is amended as follows. “Figure 1 A” described on page 20, line 12 of the specification
, B, C, D" are replaced by "Fig. 1 A, B, C, D, E.
” I corrected myself.
Claims (1)
色された着色部材を使用し、前記プラテンカバー
及びプラテン上に載置された原稿を照射する投光
装置と、前記プラテンカバーを照射した際に得ら
れる反射光を読み取るＣＣＤイメージセンサとを
有し、原稿を走査することによつて読み取つた出
力信号を用いることにより、画像信号の濃度差に
よつて前記原稿と前記プラテンカバーとを区別し
て、原稿サイズを検知する原稿サイズ検知装置に
おいて、 前記原稿と前記プラテンカバーとの境界点を検
知する検知手段と、 前記検知手段によつて検知した境界点と、前記
境界点の前後の画像信号を比較し、前記検知手段
による境界点検知の正否を判定する判定手段とを
備えたことを特徴とする原稿サイズ検知装置。[Claims for Utility Model Registration] A light projector that uses a colored member colored in a predetermined color on the inner surface of a platen cover (pressing plate) to illuminate the platen cover and a document placed on the platen; It has a CCD image sensor that reads the reflected light obtained when the platen cover is irradiated, and by using the output signal read by scanning the original, the original and the original are detected by the density difference of the image signal. A document size detection device that detects the size of a document by distinguishing it from a platen cover, comprising: a detection device that detects a boundary point between the document and the platen cover; a boundary point detected by the detection device; and a boundary point detected by the detection device; and determining means for comparing image signals before and after the detection means to determine whether boundary point detection by the detection means is correct or not.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989116690U JPH085468Y2 (en) | 1989-10-04 | 1989-10-04 | Document size detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989116690U JPH085468Y2 (en) | 1989-10-04 | 1989-10-04 | Document size detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0354931U true JPH0354931U (en) | 1991-05-28 |
| JPH085468Y2 JPH085468Y2 (en) | 1996-02-14 |
Family
ID=31664957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989116690U Expired - Lifetime JPH085468Y2 (en) | 1989-10-04 | 1989-10-04 | Document size detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH085468Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56120264A (en) * | 1980-02-28 | 1981-09-21 | Canon Inc | Picture read-in device |
| JPS57135573A (en) * | 1981-02-16 | 1982-08-21 | Canon Inc | Picture reader |
-
1989
- 1989-10-04 JP JP1989116690U patent/JPH085468Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56120264A (en) * | 1980-02-28 | 1981-09-21 | Canon Inc | Picture read-in device |
| JPS57135573A (en) * | 1981-02-16 | 1982-08-21 | Canon Inc | Picture reader |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH085468Y2 (en) | 1996-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |