JPS60235574A - Picture reader - Google Patents

Abstract

PURPOSE:To decrease far considerably the processing by constituting the titled reader that an object of picture information and an optical picture information read means are reciprocated relatively, detecting the storage state of the object of picture information at the forward path and controlling by skip or drive speed of a drive means at the return path in response to said information. CONSTITUTION:A memory 20 stores a line number of a space read by a line image sensor 14 via a preamplifier 16. As soon as the forward movement of an original 13 is finished, a control section 23 gives a control signal to a drive section 22 so as to command the return movement of the original 13. When the original 13 moves on the reading optical axis of the line image sensor 14, the sensor 14 converts sequentially the reflected light in response to the original information into an electrical signal the same as the forward movement of the original 13. The drive control section 21 controls the drive section 21 so as to apply skip of the line scanning or quickening of the drive speed in the scanning of the space of the original 13 where no information is recorded depending on the content of the memory 20.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image reading device that reads information from a document or the like and transmits, stores, or copies the information.

BACKGROUND ART In recent years, there has been a remarkable development in so-called image information processing technology, which reads information from manuscripts, transmits it over telephone lines, or stores it on magnetic disks.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An image reading apparatus that forms a technical field in image information processing technology will be described below with reference to FIG.

FIG. 1 shows the configuration of a conventional image reading device.

In FIG. 1, 1 is a light source that illuminates the original 2;
5 is a line image sensor composed of a charge-coupled device or the like that receives reflected light from the document 2 through a lighting lens 4; On the other hand, it is an adjustment means that adjusts the amplitude and the reference black and white level based on control from a control means to be described later. Reference numeral 6 denotes a control means for instructing the adjustment means 6 to adjust the reference black and white level (reference black level and amplitude) of the read scanning signal, and is constituted by a keyboard or the like so that the operator can give instructions. 7 is an A/D conversion means for converting the analog image information adjusted by the adjustment means 6 into digital image information, and 8 is a storage means 8a for storing the digital image information converted by the A/D conversion means 7. It is an image information processing means that stores the image information or transmits it to the outside via a transmission means 8b such as a telephone line. Reference numeral 9 denotes a drive unit for moving the original 2 placed on the original platen 9a, which drives the original platen 9a in the direction of arrow A when reading the original information, and drives the original platen 9a in the direction of arrow B when the reading is completed. do.

The operation of the above configuration will be explained below.

First, when the drive unit 9 drives the drive stand 9a in the direction of arrow A and the document 2 is placed on the reading optical axis of the line image sensor 3, the light emitted from the light source 1 is reflected on the surface of the document 2. , the reflected light is inputted to the line image sensor 3 via the lens 4 as image information of the original 2. The line image sensor 3 converts information obtained from the reflected light into an electrical signal (
The signal is converted into an analog signal) and sent to the adjustment means 5. The adjustment means 5 controls the analog image information signal sent from the line image sensor 3 by means of a control means 6.
The amplitude and the reference black and white level are adjusted based on the control from. Note that the control means 6 is controlled by the operator. That is, the operator visually judges the density of the original document 2, and based on the judgment, the amplitude of the image information signal and the reference black and white level are controlled by the adjusting means 5 via the control means 6.

Next, the A/D conversion means converts the analog image information signal, which is the output of the adjustment means 6 whose amplitude and reference black and white level are controlled, into a digital image information signal. After finally correcting the image information signal in the image information processing means 8, the storage means 8a such as a magnetic disk or perforated tape is
The information is then stored in a special memory, or transmitted to the outside via a transmission means 8b such as a telephone line or radio.

When reading the image information of the original 2 is completed, the driving means 9 moves the driving table 9a in the direction of arrow B to return it to the position before reading the image information of the original 2.

Now, the series of processing is completed by the above operation, but with the above configuration, for example, even if the middle of the document 2 is blank, that is, almost no information is recorded in the middle of the document 2. , the drive by the drive means 9 is at a constant speed, and has the disadvantage that a large amount of time is spent on the series of processes.

OBJECTS OF THE INVENTION In view of the above-mentioned drawbacks, the present invention provides an image reading device that can perform image reading processing at high speed.

Structure of the Invention The present invention provides that, when the driving means moves the imaged information object or the image information reading means in a forward motion, the image information reading means reads the image information of the imaged information object, and reads the image information. storage means for storing the position of the imaged information object whose image information becomes blank information; and a storage means for reading the image information when the driving means is causing the imaged information object or the image information reading means to make a backward movement. and a drive control means for reading the image information of the imaged information object and instructing the drive means to skip or speed up the drive according to the information stored in the storage means during the return movement. , which achieves the above objectives.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows a block configuration of an image reading device according to an embodiment of the present invention.

In FIG.
14 is a light source for illuminating the document 13, which receives reflected light from the document 13 through a lighting lens system 15.
A preamplifier 17 amplifies the image reading signal No. 3, and a preamplifier 17 amplifies the amplitude of the image reading signal sent from the preamplifier 16 and input to the process amplifier 18 when the document 13 is making a backward movement by a drive unit, which will be described later. 19 is a processing section that performs A/D conversion, correction, etc. of the image reading signal sent from the process amplifier 18, and then stores or transmits it to the outside. be. Reference numeral 20 denotes a memory for storing document information on the outward path read by the line image sensor 14 via the level control unit 17, and includes blank areas where no black level information is stored;
In other words, the lines of the blank area are memorized. 2
Reference numeral 1 denotes a drive control unit, which controls the drive unit to be described later, so that the forward drive is faster than the return drive, and the drive is accelerated or skipped during the return drive depending on the contents of the memory 2o. do. Reference numeral 22 denotes a drive unit that drives the original 13 in the direction of arrow A or arrow B. During forward movement, the original 13 is moved relative to the reading optical axis of the line image sensor 14.
The original 13 is moved from end a to end b-1, that is, in the direction of arrow A, while during the backward movement, the original 13 is moved from end a to end a with respect to the reading optical axis of image sensor 14. The document 13 is moved up to the point 1, that is, in the direction of arrow B. 23 is a control section, which includes a line image sensor 14, a level control section 17, a process amplifier 18, and a drive control section 21.
, and controls the operation of the drive section 22.

The operation of the above configuration will be explained below.

First, the document 13 is moved in the direction of arrow A by the drive unit 22,
That is, the document 13 is moved forward. At this time, the line image sensor 14 sequentially receives the reflected light emitted from the light source 11 and reflected by the original 13, that is, the reflected light corresponding to the original information from the end a to the end of the original 13, and generates electricity. image reading signal. The output of the line image sensor 14 is then sent to a preamplifier 16, where it is amplified.

Note that the outward movement by the driving unit 22 at this time does not need to correct the original image information and read the original image information like the backward movement described later, that is, it is sufficient to read only to detect the blank information part of the original 13. It is driving faster than the return movement.

Then, the memory 20 stores blank line information read by the line image sensor 14, that is, the line number of the blank area via the preamplifier 16. In addition,
This line number is stored in the memory 2° by inputting the output of the preamplifier 16 and internally finding a line corresponding to the information.

Now, at the same time as the outward movement of the document 13 is completed, the control section 2
3 sends a control signal to the drive unit 22 via the drive control unit 21 to instruct the backward movement of the document 13. When the original 13 moves backward, that is, moves along the reading axis of the line image sensor 14 from end to end a in the direction of arrow B, the line image sensor 14 detects the movement of the original 13 during the forward movement. Similarly, the reflected light corresponding to the document information is sequentially converted into electrical signals. At this time, the drive control unit 21
Based on the content of , when scanning the margin portion of the document 13 where no information is recorded, the drive section 22 is controlled to skip the line scan or increase the drive speed.

Next, the output of the line image sensor 14 is amplified by the preamplifier 16 and inputted to the process amplifier 1 based on instructions from the control section 21. The process amplifier 18 controls the gain of the image reading signal input from the preamplifier 16 in accordance with the control reference black level value sent from the level control section 17.

The image reading signal whose reference black level and amplitude have been adjusted by the process amplifier 18 based on instructions from the level control section 17 is sent to the processing section 19 . Then, the processing unit 19 performs analog/digital conversion and correction on the input signal, taking into account drive skips and drive speeds caused by the memory 20, and then stores the input signal in a storage means such as a magnetic disk or perforated tape. or transmitted via telephone lines, etc.

As described above, according to the present embodiment, the document 13 is caused to reciprocate by the drive section 22, and the speed of the drive section 22 is increased according to the contents of the memory 2o, or the source of the forward movement of the document 13 is increased or skewed, thereby reducing the processing time. can be shortened to dog width.

In this embodiment, the line image sensor 14 is used as a means for reading the image information of the document 13, but the line image sensor is not necessarily necessary and a two-dimensional sensor or the like may be used.

Further, the image information may be not only a manuscript but also a photograph or the like.

In this embodiment, the document 13 is moved by the drive unit 2o, but the drive unit 2o may be configured to move the line image sensor 14.

Effects of the Invention As is clear from the above explanation, the present invention subjects an imaged information object and an optical image information reading means to relative reciprocating motion, and detects the storage state of the imaged information object on the outward journey. By skipping the driving means or controlling the driving speed on the return trip according to the information, the processing time can be dramatically shortened compared to the conventional method, and its industrial value is great. There is something.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional image reading device, and FIG. 2 is a block diagram of an image reading device according to an embodiment of the present invention. 11... Light source, 12.15... Lens system, 1
3... Original, 14... Line image sensor, 16... Preamplifier, 17... Level control section, 18... Process amplifier, 19... Processing section , 20... memory, 21... drive control section, 2
2-... Drive unit, 23... Control unit.

Claims (1)

[Claims] an image information reading means for optically reading the image information of the image information object; and an image information reading means for optically reading the image information object or the image information reading means so that the image information object and the image information reading means make a reciprocating relative movement. a driving means for reciprocating the
The driving means makes a forward motion with respect to the imaged information object or the image information reading means, and while the image information reading means reads the image information of the imaged information object, at least blank image information is removed from the image information. A storage means for storing the position of the imaged information object serving as information, and a driving means that causes the imaged information object or the image information reading means to make a backward movement, and the image information reading means moves the imaged information object or the image information reading means an image reading device comprising: a drive control means for instructing the drive means to skip or speed up the driving according to information stored in the storage means when reading image information of the image reading apparatus.