JPH0223168U - - Google Patents
Info
- Publication number
- JPH0223168U JPH0223168U JP9894288U JP9894288U JPH0223168U JP H0223168 U JPH0223168 U JP H0223168U JP 9894288 U JP9894288 U JP 9894288U JP 9894288 U JP9894288 U JP 9894288U JP H0223168 U JPH0223168 U JP H0223168U
- Authority
- JP
- Japan
- Prior art keywords
- correction information
- shading correction
- shading
- reading
- good
- 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.)
- Pending
Links
- 238000003705 background correction Methods 0.000 claims description 12
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Facsimile Scanning Arrangements (AREA)
- Facsimile Image Signal Circuits (AREA)
Description
第１図は本考案に係る画像読取装置の一実施例
の概略構成図、第２図はシエーデイング板の読取
位置を説明するための図、第３図ａ，ｂは良好で
ないシエーデイング補正情報によりシエーデイン
グ補正する場合を説明するための図、第４図ａ，
ｂは良好なシエーデイング補正情報によりシエー
デイング補正する場合を説明するための図、第５
図は従来の画像読取装置におけるシエーデイング
板の読取位置を説明するための図である。
１……プロセツサ、２……イメージセンサ、３
……可変利得アンプ、４……ピークホールド回路
、５……Ａ／Ｄ変換器、６……メモリ、７……ラ
インバツフア、５１……シエーデイング板、Ｖ０
……画像信号、ＶＳ……シエーデイング補正情報
、Ｐ０，Ｐ１……シエーデイング板上のライン。
Fig. 1 is a schematic configuration diagram of an embodiment of an image reading device according to the present invention, Fig. 2 is a diagram for explaining the reading position of a shading plate, and Figs. 3 a and b show shading due to unfavorable shading correction information. A diagram for explaining the case of correction, FIG. 4a,
b is a diagram for explaining the case of performing shading correction using good shading correction information;
The figure is a diagram for explaining the reading position of a shading plate in a conventional image reading device. 1...Processor, 2...Image sensor, 3
... Variable gain amplifier, 4 ... Peak hold circuit, 5 ... A/D converter, 6 ... Memory, 7 ... Line buffer, 51 ... Shading board, V 0
...image signal, VS...shading correction information, P0 , P1 ...line on the shading board.
Claims (1)
情報を得る補正情報読取手段と、シエーデイング
補正情報を得た位置とは異なる位置でシエーデイ
ング板を読取り、このときの画像信号を前記シエ
ーデイング補正情報でシエーデイング補正した結
果を調べることにより前記シエーデイング補正情
報が良好なものであるか否かを判断する判断手段
とを備え、前記判断手段は、前記シエーデイング
補正情報が良好なものではないと判断したときに
は良好なものと判断されるまで任意の回数、前記
補正情報読取手段にシエーデイング補正情報の読
取りを繰返させるようになつていることを特徴と
する画像読取装置。 A correction information reading means for reading the shading plate to obtain shading correction information, and reading the shading plate at a position different from the position where the shading correction information was obtained, and checking the result of shading correction of the image signal at this time using the shading correction information. and determining means for determining whether the shading correction information is good or not, and when the determining means determines that the shading correction information is not good, the judgment means continues until the shading correction information is judged to be good. An image reading apparatus characterized in that the correction information reading means is configured to repeat reading of the shading correction information an arbitrary number of times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9894288U JPH0223168U (en) | 1988-07-26 | 1988-07-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9894288U JPH0223168U (en) | 1988-07-26 | 1988-07-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0223168U true JPH0223168U (en) | 1990-02-15 |
Family
ID=31325647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9894288U Pending JPH0223168U (en) | 1988-07-26 | 1988-07-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0223168U (en) |
-
1988
- 1988-07-26 JP JP9894288U patent/JPH0223168U/ja active Pending
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