JPH11164096A - Device and method for reading - Google Patents
Device and method for readingInfo
- Publication number
- JPH11164096A JPH11164096A JP9329930A JP32993097A JPH11164096A JP H11164096 A JPH11164096 A JP H11164096A JP 9329930 A JP9329930 A JP 9329930A JP 32993097 A JP32993097 A JP 32993097A JP H11164096 A JPH11164096 A JP H11164096A
- Authority
- JP
- Japan
- Prior art keywords
- green
- blue
- red
- light
- reading
- 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
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- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、赤、緑、青のL
EDを使用した光源を有する光源切替型のカラースキャ
ナ装置における読取り装置および方法に関するものであ
り、特に、光源を緑と青、青と赤、赤と緑のように2灯
点灯させ、その時の原稿からの反射光量をそれぞれ緑と
青、青と赤、赤と緑の合わさった光量とし、その値をも
とに、演算により赤、緑、青の単色光量の算出を行う。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to red, green and blue L
The present invention relates to a reading device and a method for a light source switching type color scanner device having a light source using an ED, and more particularly, to turning on two light sources such as green and blue, blue and red, and red and green, The amount of light reflected from the light source is the combined amount of green and blue, blue and red, and red and green, respectively, and based on the value, single-color light amounts of red, green, and blue are calculated.
【0002】[0002]
【従来の技術】光源切替型のカラースキャナ装置におい
て、近年光源としてLEDが使用されはじめている。こ
れは青、緑の高輝度なLEDが開発されたことに端を発
している。2. Description of the Related Art In a color scanner apparatus of a light source switching type, LEDs have recently begun to be used as a light source. This stems from the development of blue and green high-brightness LEDs.
【0003】一般的に、LEDを光源として使用するカ
ラースキャナ装置の読取り方法は、赤、緑、青の単色光
源を点灯させ、原稿から反射される光量をそのままモノ
クロのイメージセンサで読み取り、赤、緑、青のカラー
出力としている。Generally, a reading method of a color scanner using an LED as a light source is to turn on a monochromatic light source of red, green, and blue, read the amount of light reflected from a document as it is with a monochrome image sensor, Green and blue color output.
【0004】図4に、従来の読取り制御部の処理フロー
チャートを示す。以下、このフローにしたがって動作を
説明する。FIG. 4 shows a processing flowchart of a conventional reading control unit. Hereinafter, the operation will be described according to this flow.
【0005】ステップS401:赤の光源を点灯する。Step S401: The red light source is turned on.
【0006】ステップS402:原稿からの反射光量を
赤の光量として読み取る。Step S402: The amount of light reflected from the original is read as the amount of red light.
【0007】ステップS403:緑の光源を点灯する。Step S403: The green light source is turned on.
【0008】ステップS404:原稿からの反射光量を
緑の光量として読み取る。Step S404: The amount of reflected light from the original is read as the amount of green light.
【0009】ステップS405:青の光源を点灯する。Step S405: The blue light source is turned on.
【0010】ステップS406:原稿からの反射光量を
青の光量として読み取る。Step S406: The amount of light reflected from the original is read as the amount of blue light.
【0011】ステップS407:全ての原稿のデータを
読み取ったかを判定する。全て読み取ったならば処理を
終了し、全て読み取っていなければステップS408に
進む。Step S407: It is determined whether or not data of all originals has been read. If all have been read, the process ends. If all have not been read, the process proceeds to step S408.
【0012】ステップS408:次のラインを読み取る
ため原稿を移動する。そして、ステップS401に戻
る。Step S408: The original is moved to read the next line. Then, the process returns to step S401.
【0013】[0013]
【発明が解決しようとする課題】しかしながら、図4に
示す従来技術では、これら青、緑の高輝度なLEDはま
だ高価であり、また、LEDを高速で駆動した場合は、
同等の容積の放電管に比べ、光量が少なく暗いという問
題点があった。However, in the prior art shown in FIG. 4, these blue and green high-brightness LEDs are still expensive, and when the LEDs are driven at high speed,
There is a problem that the amount of light is small and dark as compared with a discharge tube having the same volume.
【0014】[0014]
【課題を解決するための手段】この発明は上記のような
問題点を考慮してなされたもので、LED光源を緑と
青、青と赤、赤と緑のように2灯点灯させ、その時の原
稿からの反射光量をそれぞれ緑と青、青と赤、赤と緑の
合わさった光量とし、その値をもとに、演算により赤、
緑、青の単色光量の算出を行う。これにより、光源部を
高速で駆動した際の読取り光量不足を防ぎ、読取り速度
の高速化が可能となる。SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems. Two LED light sources are lit, such as green and blue, blue and red, and red and green. The amount of reflected light from the original document is the combined light amount of green and blue, blue and red, and red and green, respectively.
The green and blue monochromatic light amounts are calculated. Thus, it is possible to prevent the reading light amount from being insufficient when the light source unit is driven at a high speed, and to increase the reading speed.
【0015】[0015]
【発明の実施の形態】赤、緑、青のLEDを使用した光
源を有する光源切替型のカラースキャナ装置における読
取り装置において、緑と青、青と赤、赤と緑の光源を点
灯させ、その時の原稿からの反射光量をそれぞれ緑と
青、青と赤、赤と緑の合わさった光量とし、その値をも
とに、演算により赤、緑、青の単色光量の算出を行う読
取り制御部を備えることにより、光源部を高速で駆動し
た際の読取り光量不足を防ぎ、読取り速度の高速化が可
能となる。DESCRIPTION OF THE PREFERRED EMBODIMENTS In a reading device of a color switching device of a light source switching type having a light source using red, green and blue LEDs, light sources of green and blue, blue and red, and red and green are turned on. The read control unit that calculates the monochromatic light amounts of red, green, and blue based on the values of the reflected light amounts from the original document as the combined light amounts of green and blue, blue and red, and red and green, respectively. With this arrangement, it is possible to prevent the reading light amount from being insufficient when the light source unit is driven at a high speed, and to increase the reading speed.
【0016】また、緑と青、青と赤、赤と緑の光源を点
灯させ、その時の原稿からの反射光量をそれぞれ緑と
青、青と赤、赤と緑の合わさった光量とする処理と、そ
れらの値をもとに、演算により赤、緑、青の単色光量を
算出する処理とを並列処理で行う読取り制御部を備える
ことにより、読取り処理を更に高速化することができ
る。Further, a light source for green and blue, blue and red, and red and green is turned on, and the amount of light reflected from the original at that time is set to the combined light amount of green and blue, blue and red, and red and green, respectively. The reading processing can be further speeded up by providing a reading control unit that performs the processing of calculating the monochromatic light amounts of red, green, and blue based on these values in parallel.
【0017】[0017]
【実施例】図1に、本発明の構成ブロック図を示す。図
中、1はカラースキャナ装置、2は原稿、3は原稿2に
光を照射する赤、緑、青のLED光源、4は原稿から反
射される光量を読み取るイメージセンサ、5は原稿2の
読取り位置の移動、 LED光源3の点灯、イメージセ
ンサからデータを読み取り、ホスト装置に転送するなど
の制御を行う読取り制御部である。FIG. 1 is a block diagram showing the configuration of the present invention. In the figure, 1 is a color scanner device, 2 is a document, 3 is a red, green, and blue LED light source for irradiating the document 2 with light, 4 is an image sensor that reads the amount of light reflected from the document, and 5 is reading of the document 2 It is a reading control unit that performs control such as movement of the position, turning on the LED light source 3, reading data from the image sensor, and transferring the data to the host device.
【0018】図2に、本発明の一実施例の読取り制御部
の処理フローチャートを示す。以下、このフローにした
がって動作を説明する。FIG. 2 is a flowchart showing the operation of the reading control unit according to an embodiment of the present invention. Hereinafter, the operation will be described according to this flow.
【0019】ステップS201:赤と緑の光源を点灯す
る。Step S201: The red and green light sources are turned on.
【0020】ステップS202:原稿からの反射光量を
赤と緑の合わさった光量(R+G)として読み取る。Step S202: The amount of light reflected from the original is read as the combined amount of red and green (R + G).
【0021】ステップS203:緑と青の光源を点灯す
る。Step S203: The green and blue light sources are turned on.
【0022】ステップS204:原稿からの反射光量を
緑と青の合わさった光量(G+B)として読み取る。Step S204: The amount of light reflected from the document is read as the combined amount of green and blue (G + B).
【0023】ステップS205:青と赤の光源を点灯す
る。Step S205: The blue and red light sources are turned on.
【0024】ステップS206:原稿からの反射光量を
青と赤の合わさった光量(B+R)として読み取る。Step S206: The amount of reflected light from the original is read as the combined amount of blue and red (B + R).
【0025】ステップS207:ステップS201から
ステップS206で読み取った光量(R+G)、(G+
B)、(B+R)を演算し、単色の赤、緑、青の光量を
算出する。なお、単色の赤(R)、緑(G)、青(B)
の光量は次のように求められる。 R=(((R+G)+(G+B)+(B+R))/2)
−(G+B) G=(((R+G)+(G+B)+(B+R))/2)
−(B+R) B=(((R+G)+(G+B)+(B+R))/2)
−(R+G)Step S207: The amount of light (R + G) read in steps S201 to S206, (G +
B) and (B + R) are calculated, and the light amounts of red, green and blue of a single color are calculated. In addition, monochromatic red (R), green (G), blue (B)
Is obtained as follows. R = (((R + G) + (G + B) + (B + R)) / 2)
-(G + B) G = (((R + G) + (G + B) + (B + R)) / 2)
− (B + R) B = (((R + G) + (G + B) + (B + R)) / 2)
− (R + G)
【0026】ステップS208:全ての原稿のデータを
読み取ったかを判定する。全て読み取ったならば処理を
終了し、全て読み取っていなければステップS209に
進む。Step S208: It is determined whether data of all the originals have been read. If all have been read, the process ends. If all have not been read, the process proceeds to step S209.
【0027】ステップS209:次のラインを読み取る
ため原稿を移動する。そして、ステップS201に戻
る。Step S209: The original is moved to read the next line. Then, the process returns to step S201.
【0028】この例では、ステップS201からステッ
プS206の原稿からの反射光量の読取り処理と、ステ
ップS207の単色光量の算出処理とを順番に行った
が、これらの処理を並列処理することで読取り処理の高
速化を行うことができる。In this example, the process of reading the amount of reflected light from the original in steps S201 to S206 and the process of calculating the amount of monochromatic light in step S207 are performed in order. However, the reading process is performed by performing these processes in parallel. Can be speeded up.
【0029】図3に、読取りの並列処理の説明図を示
す。図中、T1〜Tnは原稿の1ラインからnラインの
読取り処理を示し、各読取り処理のd1は図2のステッ
プS201からステップS202の赤と緑の光源に対す
る反射光量の読取り処理、d2は図2のステップS20
3からステップS204の緑と青の光源に対する反射光
量の読取り処理、d3は図2のステップS205からス
テップS206の青と赤の光源に対する反射光量の読取
り処理を示す。FIG. 3 is an explanatory diagram of the parallel processing of reading. In the drawing, T1 to Tn indicate reading processing of one line to n lines of the original, d1 of each reading processing is reading processing of the reflected light amount with respect to the red and green light sources in steps S201 to S202 of FIG. Step S20 of 2
From 3 to S204, the process of reading the amount of reflected light for the green and blue light sources is shown. D3 shows the process of reading the amount of reflected light for the blue and red light sources from step S205 to S206 in FIG.
【0030】そして、単色光量の算出処理、つまり図2
のステップS207は、読取り処理T1が終了し、読取
り処理T2のときに読取り処理T1で読み取った光量を
もとにして、単色の赤、緑、青の光量を算出する。つま
り、読取り処理Tnのときに一つ前の読取り処理T(n
−1)で読み取った光量をもとにして、単色光量の算出
が並列に処理される。Then, the process of calculating the amount of monochromatic light, that is, FIG.
In step S207, the reading process T1 is completed, and the light amounts of monochromatic red, green, and blue are calculated based on the light amounts read in the reading process T1 at the time of the reading process T2. That is, at the time of the reading process Tn, the immediately preceding reading process T (n
Based on the light amount read in -1), the calculation of the monochromatic light amount is processed in parallel.
【0031】[0031]
【発明の効果】この発明は、上記に説明したような形態
で実施され、以下の効果がある。The present invention is embodied in the form described above, and has the following effects.
【0032】LEDを使用した光源部を高速で駆動して
も、読取りの光量が低下することがないため、読取り速
度を高速化したカラースキャナ装置を提供することが可
能となる。Even if the light source unit using the LED is driven at a high speed, the amount of light for reading does not decrease, so that it is possible to provide a color scanner device with a high reading speed.
【図1】 本発明の構成ブロック図である。FIG. 1 is a configuration block diagram of the present invention.
【図2】 本発明の一実施例の読取り制御部の処理フロ
ーチャートである。FIG. 2 is a processing flowchart of a reading control unit according to an embodiment of the present invention.
【図3】 読取りの並列処理の説明図である。FIG. 3 is an explanatory diagram of parallel processing of reading.
【図4】 従来の読取り制御部の処理フローチャートで
ある。FIG. 4 is a processing flowchart of a conventional reading control unit.
5 読取り制御部 5 Read control unit
Claims (3)
する光源切替型のカラースキャナ装置における読取り装
置において、 緑と青、青と赤、赤と緑の光源を点灯させ、その時の原
稿からの反射光量をそれぞれ緑と青、青と赤、赤と緑の
合わさった光量とし、 その値をもとに、演算により赤、緑、青の単色光量の算
出を行う読取り制御部(5)を備えることを特徴とする
読取り装置。1. A reading device in a color switching device of a light source switching type having a light source using red, green, and blue LEDs, wherein light sources of green and blue, blue and red, and red and green are turned on, and a document at that time is turned on. The reading control unit (5) that calculates the amount of monochromatic light of red, green, and blue based on the value of the amount of light reflected from the unit as the combined amount of green and blue, blue and red, and red and green. A reading device comprising:
せ、その時の原稿からの反射光量をそれぞれ緑と青、青
と赤、赤と緑の合わさった光量とする処理と、それらの
値をもとに、演算により赤、緑、青の単色光量を算出す
る処理とを並列処理で行う読取り制御部(5)を備える
ことを特徴とする請求項1記載の読取り装置。2. A process of turning on the light sources of green and blue, blue and red, and red and green, and setting the amount of reflected light from the original at that time to the combined amount of green and blue, blue and red, and red and green, respectively. 2. The reading apparatus according to claim 1, further comprising a reading control unit configured to perform a process of calculating monochromatic light amounts of red, green, and blue by calculation based on the values in a parallel process.
する光源切替型のカラースキャナ装置における読取り方
法において、 緑と青、青と赤、赤と緑の光源を点灯させ、その時の原
稿からの反射光量をそれぞれ緑と青、青と赤、赤と緑の
合わさった光量とし、 その値をもとに、演算により赤、緑、青の単色光量の算
出を行うことを特徴とする読取り方法。3. A reading method in a light source switching type color scanner device having a light source using red, green, and blue LEDs, wherein a light source for green and blue, blue and red, and red and green is turned on, and a document at that time is turned on. The amount of light reflected from the device is defined as the combined amount of green and blue, blue and red, and red and green, and based on that value, the calculation of the monochromatic amounts of red, green, and blue is performed. Method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9329930A JPH11164096A (en) | 1997-12-01 | 1997-12-01 | Device and method for reading |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9329930A JPH11164096A (en) | 1997-12-01 | 1997-12-01 | Device and method for reading |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH11164096A true JPH11164096A (en) | 1999-06-18 |
Family
ID=18226871
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9329930A Pending JPH11164096A (en) | 1997-12-01 | 1997-12-01 | Device and method for reading |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH11164096A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007074759A1 (en) * | 2005-12-26 | 2007-07-05 | Canon Components, Inc. | Image readout device and its control method |
JP2010148071A (en) * | 2008-12-22 | 2010-07-01 | Canon Inc | Image reading apparatus, multifunction printer apparatus and image reading method |
US9060148B2 (en) | 2013-10-30 | 2015-06-16 | Kyocera Document Solutions Inc. | Image reading device, image forming apparatus, and image reading method |
EP2979439A4 (en) * | 2013-03-27 | 2016-10-26 | Hewlett Packard Development Co | Scanner |
-
1997
- 1997-12-01 JP JP9329930A patent/JPH11164096A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007074759A1 (en) * | 2005-12-26 | 2007-07-05 | Canon Components, Inc. | Image readout device and its control method |
US8498030B2 (en) | 2005-12-26 | 2013-07-30 | Canon Components, Inc. | Image scanning apparatus for light integrating and predicting signals |
JP2010148071A (en) * | 2008-12-22 | 2010-07-01 | Canon Inc | Image reading apparatus, multifunction printer apparatus and image reading method |
EP2979439A4 (en) * | 2013-03-27 | 2016-10-26 | Hewlett Packard Development Co | Scanner |
US9060148B2 (en) | 2013-10-30 | 2015-06-16 | Kyocera Document Solutions Inc. | Image reading device, image forming apparatus, and image reading method |
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