JP3438620B2 - Image reading device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus which prevents a binding margin portion of an original from being copied in black.

[0002]

2. Description of the Related Art Generally, an automatic document feeder (A) is used in a copying machine or a facsimile machine having a copying function.
DF) and a flatbed type document placing table for reading are provided. The ADF is for continuously and automatically feeding a large number of documents to be read to an optical reading system to continuously read an image from each document surface.

Further, the flatbed-type reading original placing table has a cover glass as a transparent original supporting plate, and a user reads one original to be read at a predetermined position on the cover glass. They are placed one by one and read by an optical reading system. The reading method using such a flat bed type document placing table is generally called book reading.

The cover glass as the document supporting plate as described above is provided with a flat bed scanner (F
BS). When copying (copying) several originals with one corner stapled by the FBS, the stapler is removed and the originals are copied one by one.
As shown in the perspective view of FIG. 1, the originals may be copied sequentially while being stapled.

When the original P is copied while being stapled, the original P is flipped over and folded outward as shown in FIG.
Is placed at a predetermined position on the cover glass. In this manner, when the original bound on the upper side is folded outward at the binding position and the original P is copied, the binding margin portion is shaded and read black, and the copy is performed as shown in the plan view of FIG. There is a problem that the binding margin portion Pb of the copied paper Pa is copied in black, and the quality of the paper on which the original is copied deteriorates.

Therefore, a white plate is attached to the document holder portion in advance, the white plate is applied to the binding margin portion, and the original is read to copy the binding margin portion in black. An image reading apparatus has been developed to prevent such a situation.

[0007]

The structure using the white plate has a problem that the number of parts increases and the image reading apparatus becomes complicated. Further, since the size of the white plate is fixed, there is a problem that it cannot be dealt with when the binding margin portion becomes large.

The present invention has been made in view of the above situation, and as a structure capable of coping with a change in the size of the binding margin portion without increasing the number of parts, the quality of copied sheets is improved. It is an object of the present invention to provide an image reading apparatus in which deterioration of the image is prevented.

[0009]

The present invention according to claim 1
Is a reading unit that reads an image of a read document placed on a support plate, a storage unit that stores the image read by the reading unit as image data, and a substantially triangular shape formed at one corner of the read image.
Black data definitive the image data in the area An image reading apparatus comprising a data converter for converting the white data,
A rectangular scanned image is displayed and the
Touch switch for setting a corner forming a region to any one of four corners of the rectangular read image
And the rectangular shape from the corner set with the touch switch
It moves by inclining at a predetermined angle with respect to the read image,
A linear moving car that can arbitrarily set the size of the triangular area
Is displayed, and the touch switch and the linear movement cursor are displayed.
The position and size of the triangular area
It is characterized in that a setting display section for setting is provided .

The present invention according to claim 2 provides the invention according to claim 1.
In the image reading device described in , numerical display on the setting display section
A column is provided, and it moves to the numerical display column in the vertical direction of the cursor.
It is characterized in that the moving length with respect to is displayed in mm unit.
To do .

Delete

According to the first aspect of the invention, since the black data of the image data of the read image corresponding to the binding margin portion of the document is converted into the white data, a special component is provided. The shadows can be electronically erased without increasing the number, and the deterioration of the quality of the paper on which the original is copied can be prevented. Also, the black data
Is converted to white data.
Since it is set to any one of the arbitrary positions, the binding margin
No matter which direction the minute is placed against the scanning unit
The shadow can be erased without using.

[0013] The black de - data to Shirode - inclined at a predetermined angle with respect to the size of the read image of the corner to be converted into data
Can be set to an arbitrary size by the movement operation of the linear movement moving cursor, the size of the binding margin portion of the draft
Depending on the situation, it is possible to easily deal with the shadow elimination of that part.

Delete

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 5 is a schematic side view of an image reading apparatus to which the present invention is applied. The image reading apparatus 1 is embodied as a copy / facsimile multifunction peripheral.
In the figure, an image reading apparatus 1 is provided with a device case 2, a holding cover 3 and a document feeding section 4.

The device case 2 incorporates an optical reading system (OP). Although details of the optical reading system are not shown, a moving frame driven by a step motor is provided with a lamp serving as a light source and a reflection mirror, a condenser lens and an image pickup device (CCD for reading an image). ) Is fixed in the device case 2. A transparent cover glass 8 is attached to the upper surface of the apparatus case 2 as a support plate for placing a document to be read. The cover glass 8 constitutes an FBS together with a lamp serving as a light source attached to the moving frame of the optical reading system and a reflection mirror.

The pressing lid 3 is provided with a substrate 5, a paper feed tray 6 and a discharge tray 7, and is attached to the upper end portion of the device case 2 by a hinge mechanism so as to be openable and closable. That is, the holding lid 3 acts as an opening / closing plate that opens and closes the cover glass 8. The document feeding unit 4 constitutes an ADF, and takes in the document to be read on the paper feed tray 6 and reverses it. Next, the document to be read is conveyed in the document feeding unit 4, and when it passes over a translucent plate (not shown), the image of the document to be read is read by the optical reading system and is discharged to the discharge tray 7.

A pressing plate sensor 9 for detecting the open / closed state of the pressing lid 3 is provided near the center of rotation of the pressing lid 3 on the upper portion of the apparatus case 2. The pressing plate sensor 9 uses, for example, a limit switch. The pressing plate sensor 9 is O when the angle ANG formed by the cover glass 8 on the upper surface of the device case 2 and the lower surface of the pressing lid 3 is a predetermined angle or less, for example, 30 degrees or less.
N, the angle ANG is set to turn off when the angle exceeds a predetermined angle.

Reference numeral 11 denotes a lamp, which serves as a light source and is attached to the moving frame of the optical reading system, and is arranged with a predetermined length in the direction orthogonal to the paper surface. HP is a home position, and the lamp 11 reciprocates horizontally from the HP position in the direction of arrow T.

FIG. 6 is a schematic block diagram showing the control section of the image reading apparatus of the present invention. Next, this block diagram will be described. The control unit 20 includes a central processing unit (CPU)
21 Network Control Unit (NCU) 2
2, modem 23, image memory 24, RAM 25, ROM
26, display unit 27, operation unit 28, reading unit 29, recording unit 3
0, a clock unit 31 is provided.

Network control unit (NC
U) 22 controls the closing and opening of the telephone line L and detects the sending and receiving of dial pulses corresponding to the fax number of the other party. The modem 23 modulates and demodulates transmission / reception data. The image memory 24 stores received image data.
Image data (image data) read by an optical reading system
Data) is temporarily stored.

The RAM 25 functions as a work area for storing temporary data obtained by the arithmetic processing according to the control program. The ROM 26 stores various control programs necessary for controlling the operation of this machine. This control program also includes a processing routine for eliminating the shadow of the read image.

The display unit 27 has a liquid crystal display panel and a light emitting diode (LED), and displays various information such as the operating state of the apparatus. Further, the display unit 27 displays a mark for selecting and switching between automatic input and manual input of the document size. Operation part 2
Reference numeral 8 is provided with various keys necessary for operating the apparatus such as a ten key, a copy / communication key, and a start key. The copy / communication key is used to select the function of the copy / facsimile multifunction machine between the copy mode and the facsimile communication mode.

The reading unit 29 is composed of an optical reading system. The recording unit 30 is composed of an electrophotographic printer and records received image data and image data read by an optical reading system on recording paper of a fixed size supplied from a paper feed cassette (not shown). The clock unit 31 counts the current time, and the output of the clock unit 31 is used to print the received time on the original document.

Next, an example of shadow erase setting of a read image in the image reading apparatus according to the embodiment of the present invention will be described with reference to FIG. FIG. 1 shows the display unit 27 when shadow elimination is set.
Shows a screen displayed in. In FIG. 1, the title "Shadow elimination setting" is displayed in the title display field 27a. 27b is an input key for setting the shadow elimination area of the read image, and the four corners of the upper left, upper right, lower left and lower right are displayed on the touch panel.

Any one of the four corners displayed on the touch panel is touched to set the shadow elimination area of the read image. In this way, the shadow erasing area of the read image can be set at any one of the four corners, so that the original on which the binding margin is formed can be placed on the support plate in any direction. However, the shadow removal process can be performed without any trouble.

When the shadow elimination area of the read image is set by the input key 27b, the cursors 27d and 27e are displayed at the set positions on the read image display surface 27c. The cursor 27d is fixed at the reference position. Also, the cursor 27e
Moves toward or away from the cursor 27d fixed at the reference position by the scroll keys 27f and 27g (direction of arrow S), and the size of the substantially triangular shadow elimination region becomes arbitrary. Is set. Therefore, even if the size of the binding margin portion becomes large, the shadow elimination process can be performed.

The scroll key 27f is a cursor 27e.
Is moved away from the cursor 27d, and the scroll key 27g moves the cursor 27e so as to approach the cursor 27d. The length in the vertical direction between the cursors 27d and 27e is displayed in mm in the numerical display field 27h. The set key 27i is pressed to complete the setting of the shadow elimination area of the read image.

FIG. 3 is a flowchart showing the processing procedure for eliminating the shadow of the read image. Next, this flow chart will be described.

(1) In step S1, the processing program is started, and in step S2, the shadow elimination setting of the read image is selected. Next, in step S3, the area of the corner where the shadow of the read image is erased is set by the input key 27b. Then, in step S4, the reading of the original document placed on the support plate is started, and the image data of the read image is stored in the memory.

(2) Next, the process proceeds to step S5,
Regarding the image data of the read image, the black data in the area designated by the processing in step S3 is converted into white data. Details of this data conversion processing will be described later with reference to the explanatory view of FIG. 2 and the flowchart of FIG. In step S6, the converted data is printed, and in step S7.
Ends the processing program.

Next, a concrete example of the processing for converting the black data of the set shadow erasure area of the read image into the white data will be described with reference to FIG. FIG. 2 shows a part of the read image, in which the black data is converted into white data for the image data of the triangular portion surrounded by abd in the upper left corner. And In this example, the triangle a-b-d is an isosceles triangle, and ab = ad and angle abd = 45 degrees are set. A straight line connecting the vertices a to b-d (the triangle a-b-
A vertical line is drawn on the bottom of d) and the length of ac is set to X mm.

The length L of ab at this time is L = √2X
Calculated in mm. Here, the number of dots in the image is (8 ×
8) Dots / mm, the number of dots 1 corresponding to the length L of ab corresponds to 1 = 8 × √2X dots.

The black data of each dot of the triangles ab-d set as the shadow elimination area of the read image is logical "1".
Is stored in memory as. In the present invention, black data of image data is converted to white data by replacing the logic of dots stored in the memory as the logic "1" in the shadow erasing area with "0". To do.

In FIG. 2, with respect to the n-th line corresponding to the position b of the image data stored in the memory as a reference, the respective lines of n + 1, n + 2, ... The data conversion process proceeds. In this data conversion process, a straight line a-d is formed along the straight line b-d.
The number of dots on the line corresponding to the length from (1-1, l-
2 ... l = 0) black data is converted to white data.

FIG. 4 is a flow chart showing the processing procedure of the data conversion processing. Next, this flow chart will be described.

(1) In step S11, the processing program is started, and in step S12, the number of dots in the portion L in FIG. 2 is calculated, and the number of dots is set to 1. Next, in step S13, the counter is initialized and n = 0 is set.

(2) Then, in step S14, the 1-dot black data from the left of the n-th line of the memory is converted into white data. Next, in step S15, the setting of n is incremented to n + 1, and the setting of l is decremented to l-1. Then, in step S16, it is determined whether or not l = 0.

(3) If the decision result in the step S16 is NO, the process returns to the step S14, and the steps S14-
The loop process of step S16 is repeated. Step S1
If the judgment result of 6 is YES, it means that the process of converting the black data of the set area into the white data is completed,
In step S17, the processing program ends.

In the example of FIG. 2, the area in which the black data of the image data is converted into the white data has been described on the assumption that the angle abd is 45 degrees in the part of the isosceles triangle abd. In the present invention, the substantially triangular portion for converting the black data of the image data into the white data is not limited to the isosceles triangle.
The triangle a-b-d in FIG. 2 is an isosceles triangle, and the angle a
bd can be set to an arbitrary angle.

In this way, the image data of the region of the scalene triangle is
When the conversion processing of the cursor is performed, a key for changing the angle of the cursor 27e is displayed on the touch panel of the display unit 27 of FIG. 1 to set the angle. As shown in FIG. 2, when the angle abd of the triangle ab-d is 45 degrees, the length for converting the image data is subtracted by 1 dot from l dot, but the triangle a-b- When the angle abd of d is set to an arbitrary angle, the number of dots to be subtracted is determined corresponding to the angle.

[0042]

As described above, according to the present invention,
Since the black data of the image data of the read image corresponding to the binding margin portion of the original is converted into white data, the shadow is electronically erased without increasing the number of special components, and the original It is possible to prevent deterioration of the quality of the copied paper. Also, Hara
The black data of the image data of the read image corresponding to the binding margin of the draft.
-When converting data to white data, display the conversion location
Scanned image displayed above, touch switch and straight line
Since the position and size are set with a moving cursor ,
No matter which direction the binding margin is placed with respect to the reading unit ,
Even if the size of the binding margin changes,
It is possible to easily set the area in which the shadow is deleted.
In addition, a numerical value display column is provided in the setting display section to display the numerical value.
Move to the column
If you display it in units, you can see the current position of the moving cursor by a numerical value.
be able to.

[0043]

Delete

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of shadow elimination setting of a read image in an image reading apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of an example of converting black data in a corner portion of a read image into white data.

FIG. 3 is a flowchart showing a processing procedure for eliminating shadows in a read image.

FIG. 4 is a flowchart showing a processing procedure for converting black data of a region designated in a read image into white data.

FIG. 5 is a side view of the image reading apparatus.

FIG. 6 is a block diagram of a control unit of the image reading apparatus.

FIG. 7 is a perspective view showing an example of a bound document.

FIG. 8 is a plan view showing an example in which a binding margin portion is copied in black.

[Explanation of symbols]

1 Image reading device 3 Presser lid 8 cover glass 9 Press plate sensor 10 Optical sensor 11 Light source lamp 20 Control unit 21 Central Processing Unit (CPU) 25 RAM 27 Display 29 Reader 30 recording section OP optical reading system

Claims (2)

(57) [Claims] 1. A reading unit for reading an image of a read original placed on a support plate, a storage unit for storing the image read by the reading unit as image data, and a storage unit formed at one corner of the read image. image reader black data definitive the image data of the triangle area comprising a data converter for converting the white data
In addition to displaying a rectangular read image,
Touch for setting a corner forming a substantially triangular area to any one of the four corners of the rectangular read image
From the corner set with the switch and the touch switch,
Moves at a predetermined angle with respect to a rectangular scanned image
However, a linear shape that arbitrarily sets the size of the above-mentioned triangular area
Display the moving cursor and the touch switch and straight line
The position of the above-mentioned triangular area by operating the moving cursor
An image reading apparatus comprising a setting display unit for setting a size and a size . 2. A numerical display column is provided in the setting display section, and the number
Move to the value display field Set the moving length of the cursor in the vertical direction.
The image reading device according to claim 1, wherein the image is displayed in units of mm .