JPH0485959U - - Google Patents
Info
- Publication number
- JPH0485959U JPH0485959U JP12666590U JP12666590U JPH0485959U JP H0485959 U JPH0485959 U JP H0485959U JP 12666590 U JP12666590 U JP 12666590U JP 12666590 U JP12666590 U JP 12666590U JP H0485959 U JPH0485959 U JP H0485959U
- Authority
- JP
- Japan
- Prior art keywords
- data
- read
- bright
- illumination
- turned
- 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
- 238000005286 illumination Methods 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000003705 background correction Methods 0.000 description 1
- 238000013139 quantization Methods 0.000 description 1
Landscapes
- Facsimile Image Signal Circuits (AREA)
Description
第１図は本考案による画像処理装置の一実施例
を示すブロツク図、第２図は第１図に示したアン
プの出力信号を示す波形図、第３図はシエーデイ
ング補正データの取り込み処理を示すフローチヤ
ート、第４図はＡ／Ｄコンバータによる量子化時
の各部の動作を示すタイミングチヤート、第５図
は本考案による濃度調整方法を示す説明図、第６
図はスキヤナの読取部の模式的構成を示す正面図
である。
１……原稿、２……ＬＥＤアレー、５……ＣＣ
Ｄ、６……ＣＰＵ、１１……サンプルホールド回
路、１２……ＥＰＲＯＭ、１３……スリーステー
ト・バス・トランシーバ、１４……データセレク
ト、１５……ＳＲＡＭ、１６，１７……Ｄ／Ａコ
ンバータ、１８……カウンタ、１９……Ａ／Ｄコ
ンバータ、２０……コンパレータ、２１……ゲー
トアレー、２２……アンプ、２４……カウンタ／
デコーダ。
Fig. 1 is a block diagram showing an embodiment of the image processing device according to the present invention, Fig. 2 is a waveform diagram showing the output signal of the amplifier shown in Fig. 1, and Fig. 3 shows the process of importing the shading correction data. Flowchart, FIG. 4 is a timing chart showing the operation of each part during quantization by the A/D converter, FIG. 5 is an explanatory diagram showing the density adjustment method according to the present invention, and FIG.
The figure is a front view showing a schematic configuration of the reading section of the scanner. 1... Original, 2... LED array, 5... CC
D, 6... CPU, 11... Sample hold circuit, 12... EPROM, 13... Three-state bus transceiver, 14... Data select, 15... SRAM, 16, 17... D/A converter, 18...Counter, 19...A/D converter, 20...Comparator, 21...Gate array, 22...Amplifier, 24...Counter/
decoder.
Claims (1)
た場合及び点灯した場合について読み取つた画像
信号を暗データ及び明データの各デジタル化信号
として格納する記憶手段と、前記記憶手段に格納
されている暗データ及び明データに補正を加える
補正手段と、前記記憶手段から読み出した暗デー
タに対応する電圧及び明データに対応する電圧の
範囲で原稿に対する読取信号を多段階に量子化す
るＡ／Ｄコンバータとを具備することを特徴とす
る画像処理装置。 a storage means for storing image signals read with respect to a white reference plate or reference paper when the illumination is turned off and when the illumination is turned on as respective digitized signals of dark data and bright data; a correction means for correcting the dark data and the bright data; and an A/D converter that quantizes the read signal for the document in multiple stages within a voltage range corresponding to the dark data and a voltage corresponding to the bright data read from the storage means. An image processing device comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990126665U JP2539447Y2 (en) | 1990-11-30 | 1990-11-30 | Image processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990126665U JP2539447Y2 (en) | 1990-11-30 | 1990-11-30 | Image processing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0485959U true JPH0485959U (en) | 1992-07-27 |
| JP2539447Y2 JP2539447Y2 (en) | 1997-06-25 |
Family
ID=31874206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990126665U Expired - Fee Related JP2539447Y2 (en) | 1990-11-30 | 1990-11-30 | Image processing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2539447Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02174465A (en) * | 1988-12-27 | 1990-07-05 | Matsushita Electric Ind Co Ltd | Shading correction circuit |
| JPH02216975A (en) * | 1989-02-16 | 1990-08-29 | Minolta Camera Co Ltd | Picture reading device |
-
1990
- 1990-11-30 JP JP1990126665U patent/JP2539447Y2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02174465A (en) * | 1988-12-27 | 1990-07-05 | Matsushita Electric Ind Co Ltd | Shading correction circuit |
| JPH02216975A (en) * | 1989-02-16 | 1990-08-29 | Minolta Camera Co Ltd | Picture reading device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2539447Y2 (en) | 1997-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |