JPH0480179U - - Google Patents
Info
- Publication number
- JPH0480179U JPH0480179U JP12363790U JP12363790U JPH0480179U JP H0480179 U JPH0480179 U JP H0480179U JP 12363790 U JP12363790 U JP 12363790U JP 12363790 U JP12363790 U JP 12363790U JP H0480179 U JPH0480179 U JP H0480179U
- Authority
- JP
- Japan
- Prior art keywords
- density
- correction formula
- standard
- read
- display means
- 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
- 238000010586 diagram Methods 0.000 description 4
- 238000013500 data storage Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
Description
第１図は本考案の実施例を示す制御部の要部機
能ブロツク図、第２図は多値画像入力装置の平面
図、第３図は多値画像入力装置のハード構成を示
すブロツク図、第４図は補正動作のフローチヤー
ト、第５図は濃度表示プレートとイメージセンサ
との位置関係を示す図、第６図は濃度補正の原理
を示す図である。
１……枠体、２……プラテンガラス、３……ス
キヤニングユニツト、５……濃度表示プレート、
１７……サンプルデータ格納部、１８……補正前
データ格納部、１９〜２２……比較部、２３〜２
６……処理部、２７……補正式演算部、２８……
補正後データ格納部。
FIG. 1 is a functional block diagram of a main part of a control section showing an embodiment of the present invention, FIG. 2 is a plan view of a multi-value image input device, and FIG. 3 is a block diagram showing the hardware configuration of a multi-value image input device. FIG. 4 is a flowchart of the correction operation, FIG. 5 is a diagram showing the positional relationship between the density display plate and the image sensor, and FIG. 6 is a diagram showing the principle of density correction. 1...Frame body, 2...Platen glass, 3...Scanning unit, 5...Concentration display plate,
17... Sample data storage section, 18... Pre-correction data storage section, 19-22... Comparison section, 23-2
6...Processing unit, 27...Correction formula calculation unit, 28...
Post-correction data storage section.
Claims (1)
副走査行程全域にわたつて設けられ、主走査方向
に段階的に濃度を変化させた濃度帯を有する標準
濃度表示手段と、 イメージセンサで読取ライン毎に読取られた原
稿および前記標準濃度表示手段の濃度データを格
納する記憶手段と、 前記標準濃度表示手段の読取濃度および既知の
濃度の差を各標準濃度別に検出する手段と、 前記差に基づいて前記読取られた原稿濃度デー
タを補正する補正式を算出する補正式演算手段と
、 算出された補正式を用いて、前記原稿濃度デー
タを補正する処理手段を具備したことを特徴とす
る多値画像入力装置。[Scope of Claim for Utility Model Registration] A standard density display means provided over the entire sub-scanning path facing the image sensor outside the document reading area and having a density band whose density is changed stepwise in the main-scanning direction. , storage means for storing density data of the document read for each reading line by the image sensor and the standard density display means, and means for detecting the difference between the read density of the standard density display means and the known density for each standard density. and a correction formula calculating means for calculating a correction formula for correcting the read original density data based on the difference, and a processing means for correcting the original density data using the calculated correction formula. A multivalued image input device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990123637U JP2543321Y2 (en) | 1990-11-27 | 1990-11-27 | Multi-value image input device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990123637U JP2543321Y2 (en) | 1990-11-27 | 1990-11-27 | Multi-value image input device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0480179U true JPH0480179U (en) | 1992-07-13 |
| JP2543321Y2 JP2543321Y2 (en) | 1997-08-06 |
Family
ID=31871332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990123637U Expired - Lifetime JP2543321Y2 (en) | 1990-11-27 | 1990-11-27 | Multi-value image input device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2543321Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63224475A (en) * | 1987-03-13 | 1988-09-19 | Mitsubishi Electric Corp | Color image reader |
| JPH02272878A (en) * | 1989-04-13 | 1990-11-07 | Ricoh Co Ltd | Original reading device |
-
1990
- 1990-11-27 JP JP1990123637U patent/JP2543321Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63224475A (en) * | 1987-03-13 | 1988-09-19 | Mitsubishi Electric Corp | Color image reader |
| JPH02272878A (en) * | 1989-04-13 | 1990-11-07 | Ricoh Co Ltd | Original reading device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2543321Y2 (en) | 1997-08-06 |
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