JPS63171069U - - Google Patents
Info
- Publication number
- JPS63171069U JPS63171069U JP6213687U JP6213687U JPS63171069U JP S63171069 U JPS63171069 U JP S63171069U JP 6213687 U JP6213687 U JP 6213687U JP 6213687 U JP6213687 U JP 6213687U JP S63171069 U JPS63171069 U JP S63171069U
- Authority
- JP
- Japan
- Prior art keywords
- setting
- setting means
- reference level
- signal value
- level
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000003705 background correction Methods 0.000 description 1
Landscapes
- Image Input (AREA)
- Facsimile Image Signal Circuits (AREA)
Description
第１図は画像読取り装置におけるγ補正装置の
ブロツク構成図、第２図は横軸に照度を、縦軸に
センサの出力をとり、光電変換エレメントまたは
エレメントブロツクのγ特性曲線を示すグラフ、
第３図は本考案の実施例装置のシステム回路図、
第４図は横軸に走査方向を、縦軸にセンサの走査
出力をとり、センサの白原稿読取り出力波形を示
したグラフ、第５図は横軸に走査方向を、縦軸に
シエーデイング補正後の走査出力をとり、白原稿
読取り出力波形と、各スライスレベルを示したグ
ラフである。
１……センサ、２……補正係数記憶手段、３…
…基準レベル設定手段、４……信号値設定手段、
５……階調設定手段、６……同期手段。
FIG. 1 is a block configuration diagram of a γ correction device in an image reading device, and FIG. 2 is a graph showing the γ characteristic curve of a photoelectric conversion element or element block, with illuminance on the horizontal axis and sensor output on the vertical axis.
FIG. 3 is a system circuit diagram of an embodiment of the present invention;
Figure 4 is a graph showing the sensor's white document reading output waveform, with the horizontal axis representing the scanning direction and the vertical axis representing the sensor's scanning output. Figure 5 is a graph showing the scanning direction on the horizontal axis and the vertical axis after shading correction. This is a graph showing a white original reading output waveform and each slice level. 1...Sensor, 2...Correction coefficient storage means, 3...
...Reference level setting means, 4...Signal value setting means,
5... Gradation setting means, 6... Synchronization means.
Claims (1)
方向に列設した光電変換エレメントからなるセン
サで画信号として検出し、該画信号を複数の階調
信号に変換する画像読取り装置において、 各エレメントまたは各エレメントブロツクによ
る白読取り時の画信号のピーク値を揃えたと仮定
した場合に、各エレメントまたは各エレメントブ
ロツクのγ特性に対応させて各エレメントまたは
各エレメントブロツクのスライスレベルを共通に
設定する補正係数を記憶した記憶手段と、 センサの白読取り時の画信号のピーク値を基準
レベルとして設定する基準レベル設定手段と、 前記記憶手段の補正係数データと前記基準レベ
ル設定手段が設定した基準レベルに基づき、各エ
レメントまたは各エレメントブロツクの各スライ
スレベルに対応する出力信号値を設定する信号値
設定手段と、 信号値設定手段の設定した信号値によつてセン
サからの画信号の階調レベルを設定する階調設定
手段と、 センサ、基準レベル設定手段、信号値設定手段
、及び階調設定手段の同期を確立する同期手段 とからなることを特徴とした画像読取り装置にお
けるγ補正装置。[Claims for Utility Model Registration] The reflected light from the document illuminated by a light source is detected as an image signal by a sensor consisting of photoelectric conversion elements arranged in a row in the scanning direction, and the image signal is converted into a plurality of gradation signals. In an image reading device, assuming that the peak values of the image signals during white reading by each element or each element block are aligned, the slices of each element or each element block are a storage means that stores a correction coefficient for commonly setting a level; a reference level setting means that sets a peak value of an image signal during white reading of the sensor as a reference level; and correction coefficient data of the storage means and the reference level setting. a signal value setting means for setting an output signal value corresponding to each slice level of each element or each element block based on a reference level set by the means; and a signal value setting means for setting an output signal value corresponding to each slice level of each element or each element block; An image reading device comprising: a gradation setting means for setting a gradation level of a signal; and a synchronization means for establishing synchronization of a sensor, a reference level setting means, a signal value setting means, and the gradation setting means. γ correction device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6213687U JPH0540611Y2 (en) | 1987-04-24 | 1987-04-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6213687U JPH0540611Y2 (en) | 1987-04-24 | 1987-04-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63171069U true JPS63171069U (en) | 1988-11-08 |
| JPH0540611Y2 JPH0540611Y2 (en) | 1993-10-14 |
Family
ID=30896120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6213687U Expired - Lifetime JPH0540611Y2 (en) | 1987-04-24 | 1987-04-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0540611Y2 (en) |
-
1987
- 1987-04-24 JP JP6213687U patent/JPH0540611Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0540611Y2 (en) | 1993-10-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6437174U (en) | ||
| CA2063472A1 (en) | Method of resolution conversion | |
| CA2077326A1 (en) | Scan image processing | |
| JPS5579567A (en) | Shading correction system | |
| JPS63171069U (en) | ||
| JP2673690B2 (en) | Image reading device | |
| JPH02272878A (en) | Original reading device | |
| JPH01110561U (en) | ||
| JPH048575U (en) | ||
| JPS61257069A (en) | Correcting method for quantity of light variation | |
| JPH0164260U (en) | ||
| JPH0397275U (en) | ||
| JPS62196467U (en) | ||
| JPS63113368U (en) | ||
| JPS62169568U (en) | ||
| JPH01133655U (en) | ||
| JPS6356861U (en) | ||
| JPS63131451U (en) | ||
| JPS6266460U (en) | ||
| JPS6424569A (en) | Method for reading and correcting image | |
| JPH0232272U (en) | ||
| JPS6338482U (en) | ||
| JPS60116779U (en) | color imaging device | |
| JPH0244467U (en) | ||
| JPH0398563U (en) |