JP2001285583A - Image reader, copying machine, image read control method and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reader, a copying machine, an image read control method and a storage medium that can reduce first copy time, by sensing the size of a placed original and quickly placing a read means to a position for shading correction by the time an operator depresses a copy start button, in the case of reading the original by using an ADF or the original placed on an original platen glass pane. SOLUTION: The image reader is provided with a read means 1, with that an original is irradiated and guides an optical image to a photoelectric conversion means 2, which converts the optical image into an electric signal, an opening/closing detection means 3 that detects the opening/closing of an ADF 70, and a control means 5, that places the read means 1 to an original size sensing position, when it detects that the ADF 70 is open or places the read means 1 to a shading correction position, when it detects that the ADF 70 is closed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an image reading apparatus, a copying apparatus, an image reading control method, and a storage medium.
The present invention relates to an image reading device that reads a document image using a line image sensor such as a CCD, a copying device equipped with the image reading device, an image reading control method executed by the image reading device, and a storage medium applied to the image reading device.

[0002]

2. Description of the Related Art A schematic configuration of a conventional image reading apparatus is shown in FIG.
Shown in A document 204 placed on a platen glass 203 illuminated by a document illumination lamp 201 as shown in FIG.
Images of the first mirror 205, the second mirror 206, and the third mirror 205
An image is formed on the CCD 209 via the mirror 207 and the lens 208, and a line image of the document 204 is read. The document illumination lamp 201 and the first mirror 205 move in the direction of the arrow, and sequentially read line images. At this time, the second mirror 206 and the third mirror 207 also move in the direction of the arrow, and are driven by a drive system (not shown) so that the distance (optical path length) from the document surface to the CCD 209 is constant. 20 in the figure
0 denotes a reading unit, 210 denotes a document pressure plate, 211 denotes a shading correction plate, and 212 denotes a window.

A reading sequence of the image reading apparatus having such a configuration will be described. When the operator places the original 204 on the original platen glass 203 and inputs a read command with a start button or the like, the image reading apparatus first detects the original size.

Here, a conventional document size detecting method will be described first. In the conventional document size detection, four size detection sensors 30-1 and 30-2, as shown in FIG.
The size of the document is determined based on the detection results of 30-3 and 30-4. FIG. 14 shows the result of determining the document size with respect to the detection result. In FIG. 14, Δ indicates that a document is present, and ● indicates that no document is detected. A combination of detection results not described in the table of FIG. 14 is determined to be a nonexistent document size, and prompts the operator to input a document size.

[0005] Instead of such a document size detection method,
In recent years, the technique of "CCD original size detection" has been widely adopted. The detection of the size of the CCD document will be described. In the CCD original size detection, the size detection sensors 30-1 and 30-2 in FIG. 13 are abolished, the signal level of a predetermined pixel of the CCD 209 is read using the reading unit 200 in place of the abolished sensor, and is determined in advance. If it is higher than the slice level, there is a document
The original size is determined based on the detection result shown in FIG.

In an image reading apparatus having a CCD document size detecting function, it is necessary to detect a document size before a document reading operation, so the member arrangement shown in FIG. That is, the document 204 is placed on the platen glass 203 by the operator,
When a copy start button (not shown) is pressed, the document illumination lamp 201 is caused to emit light at the home position shown in FIG. 12, and the driving system (not shown) is used to arrange the members shown in FIG.
The size of the document 204 is determined. Such a CCD document size detection method is disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 5-20723.
The technique disclosed in Japanese Patent Application Publication No. 9-209 is generally known.

Thereafter, the image reading apparatus changes the member arrangement as shown in FIG.
The position is returned to the position 2, and the shading correction plate 211 is read to perform shading correction. The shading correction corrects for variations in sensitivity of each pixel of the CCD 209, illumination unevenness of the document illumination lamp 201, a decrease in peripheral light amount of the lens 208, and the like, and corrects an image signal so that a line image output of the image reading apparatus becomes uniform. It is something to put on.
When the shading correction is completed, the image reading apparatus changes the member arrangement to the position shown in FIG. 16, that is, moves the reading unit 200 to the start position, and moves the reading unit 20 in the direction of arrow A.
0 is accelerated and advanced at a constant speed from the position of the end portion C of the original 204 to read the image of the original 204.

An image reading apparatus having a conventional document size detecting means is composed of four size detecting sensors 30 shown in FIG.
The shading correction process may be performed while detecting the detection states of -1 to 30-4. That is, the image reading apparatus having the CCD document size detecting means moves from the home position of FIG. 12 to the document size detecting position of FIG. It takes extra time to return to.

The line image read by the above-described operation is input to an image processor circuit (not shown), the image data is sent to a printer or a host computer, and the read image is reproduced. When the document size information is transmitted before the image data is transmitted, for example, when data is transmitted to a printer, a sheet optimal for the document size and the magnification is selected, and the read image is copied.

[0010]

However, the above prior art has the following problems. That is,
As described above, the image reading apparatus having the CCD document size detecting means moves from the home position in FIG. 12 to the document size detecting position in FIG. FIG.
It will take extra time to return to home position 2.

In the embodiment disclosed in Japanese Patent Laid-Open No. Hei 5-207239, the home position is
There is a description that "the position of the home position in the scanning device is set within a range of several mm to several tens of mm from the leading end of the document", and the timing of document size detection is described in "Start Button of Image Reading Device". , The width of the document is immediately detected by the scanning device, and so on. "
3 is longer than an apparatus employing the conventional document size detection method shown in FIG.

In order to solve this problem, the arrangement of the members shown in FIG. 15 is set to the home position, the size of the original is detected at the moment when the copy start button is pressed by the operator, and then the position is moved to the shading correction position shown in FIG. By doing so, it is possible to prevent the first copy time from being affected.

However, in the case of a model equipped with an auto document feeder having a document size detecting function instead of the document pressure plate, it is not necessary to perform document size detection in the image reading apparatus main body, and the document reading using the automatic document feeder is not required. In the case of (2), if the member arrangement in FIG. 15 is set to the home position, after the copy start button is pressed by the operator, the member must be moved to the position in FIG. 12 to perform shading correction. Is added to the first copy time.

Hereinafter, reading of a document using the automatic document feeder will be described. In the image reading device,
In recent years, it is not uncommon for an automatic document feeder (ADF) to be mounted as a standard. The ADF has a function of automatically and continuously exchanging a large number of originals, so that it is possible to save time and effort for replacing originals one by one and to shorten copying time.

The reading operation using the ADF will be described for convenience with reference to FIGS. In the image reading apparatus in which the ADF 70 is mounted, when the reading section 200 is located at the home position, the members are arranged as shown in FIG. However, since the document is placed on the ADF 70, the document size detection is performed on the ADF side. FIG. 5 shows a member configuration of the ADF 70 as viewed from above. The ADF 70 is provided with a document guide 81, which is movable in the direction of the arrow, and detects the length of the document in the width direction based on the guide position. In addition, a reflection type sensor 82 is also disposed, and it is also detected whether or not the document is covered by the reflection type sensor 82 to determine the size of the document. Further, the ADF 70 is
Also, it is detected whether a document is placed on the document.

Accordingly, when the reading operation is started, the image reading apparatus changes the member arrangement to the member arrangement shown in FIG. 6 and performs shading correction without detecting the document size at the position shown in FIG. When the shading correction processing is completed, each member is moved so that the members are arranged as shown in FIG. 7, and the position of the reading unit 200 is fixed. This position corresponds to the start position described with reference to FIG. A window 212 is provided at the start position. In the case of ADF reading, a plurality of documents are placed on the paper feed tray 71. When the reading is started, the original is fed one by one by sheet feeding rollers 72 and 73, passed by guides 74, 77, 76 and a slit of the conveying roller 75 by a conveying roller 75 rotating in the direction of an arrow, and discharged to a discharge tray. It is discharged to 78. The rotation speed of the transport roller 75 is determined by the reading magnification. The image of the document conveyed by the conveyance rollers 75 is read from the window 212 by the reading unit 200.

As described above, in the conventional image reading apparatus equipped with an ADF, after the copy start button is pressed by the operator, the member must be moved to the position shown in FIG. 6 to perform the shading correction. There was a problem that the moving time was added to the first copy time.

The present invention has been made in view of the above points, and the operator presses the copy start button both when reading using the ADF and when reading a document placed on the platen glass. Image reading apparatus, a copying apparatus, an image reading control method and an image reading apparatus capable of shortening a first copy time by detecting a size of a placed document and arranging a member at a position where a shading correction can be quickly performed. It is intended to provide a storage medium.

[0019]

According to a first aspect of the present invention, there is provided an original pressing plate for pressing an original on a platen, and a reading unit for reading an image on the original pressed by the original pressing plate. Opening / closing detecting means for detecting the opening / closing operation of the original pressure plate, and, when the opening / closing detection means detects the closing operation of the original pressure plate, arranging the reading means at the original size detecting position to execute the original size detection And control means for controlling the arrangement of the reading means at the shading correction position thereafter.

According to a second aspect of the present invention, there is provided a paper feed mechanism which is attached to an image reading apparatus body so as to be openable and closable, and which automatically feeds a document, and a document fed by the paper feed mechanism. Reading means for reading the upper image, loading detection means for detecting whether or not a document is loaded in the paper feed mechanism; and loading of the document being detected in the paper feed mechanism by the loading detection means. In this case, a control unit is provided for performing control for disposing the reading unit at a shading correction position.

In order to achieve the above object, the invention according to claim 3 is characterized in that the control means performs control for reading a desired image area with shading correction.

According to a fourth aspect of the present invention, there is provided a document size detecting means for detecting a size of a document loaded in the paper feed mechanism.

In order to achieve the above object, the invention according to claim 5 includes a document pressing plate for pressing a document on a document table, and reading means for reading an image on the document pressed by the document pressing plate, A copying apparatus that forms an image read by a reading unit on a recording medium, wherein the opening / closing detection unit detects opening / closing operation of the original platen, and the closing operation of the original platen is detected by the opening / closing detection unit The document size detection is performed by disposing the reading means at the document size detection position;
And control means for controlling the arrangement of the reading means at the shading correction position.

According to a sixth aspect of the present invention, there is provided a paper feed mechanism which is attached to an image reading apparatus body so as to be openable and closable, and which automatically feeds a document, and a document fed by the paper feed mechanism. A reading unit for reading an image on the recording medium, the copying unit forming an image read by the reading unit on a recording medium, wherein a loading detection unit detects whether a document is loaded in the paper feeding mechanism. And a control unit that controls the reading unit to be placed at a shading correction position when the loading detection unit detects that a document is loaded in the paper feeding mechanism.

In order to achieve the above object, the invention according to claim 7 is characterized in that the control means performs control for reading a desired image area with shading correction.

According to another aspect of the present invention, there is provided a document size detecting means for detecting a size of a document loaded in the paper feeding mechanism.

According to a ninth aspect of the present invention, there is provided an image reading apparatus comprising: a document pressing plate for pressing a document on a document table; and reading means for reading an image on the document pressed by the document pressing plate. An opening / closing detection step of detecting an opening / closing operation of the original platen; and detecting the size of the original when the closing operation of the original platen is detected by the opening / closing detection step. And a control step of performing a control of arranging the reading means at a shading correction position.

According to a tenth aspect of the present invention, there is provided a paper feed mechanism which is attached to an image reading apparatus body so as to be openable and closable and automatically feeds a document, and a document fed by the paper feed mechanism. An image reading control method applied to an image reading apparatus having reading means for reading an upper image, comprising: a loading detection step of detecting whether a document is loaded in the paper feed mechanism; and a loading detection step of: And a control step of performing control for disposing the reading unit at a shading correction position when it is detected that a document is loaded in the paper feed mechanism.

In order to achieve the above object, the invention according to claim 11 is characterized in that in the control step, control is performed to read a desired image area with shading correction.

[0030] In order to achieve the above object, the invention according to a twelfth aspect of the present invention is characterized in that the invention has a document size detecting step of detecting the size of a document loaded in the paper feeding mechanism.

According to a thirteenth aspect of the present invention, there is provided an image reading apparatus comprising: a document pressing plate for pressing a document on a document table; and reading means for reading an image on the document pressed by the document pressing plate. A computer-readable storage medium storing a program that executes an image reading control method applied to the image reading control method, wherein the image reading control method includes an open / close detection step of performing control to detect an opening / closing operation of the document pressure plate; When the closing operation of the document pressure plate is detected by the opening / closing detection step, the reading unit is disposed at the document size detecting position to perform document size detection, and then the reading unit is disposed at the shading correction position. And a control step of controlling.

According to a fourteenth aspect of the present invention, there is provided a paper feed mechanism which is attached to an image reading apparatus body so as to be openable and closable and automatically feeds a document, and a document fed by the paper feed mechanism. A computer-readable storage medium storing a program that executes an image reading control method applied to an image reading apparatus having a reading unit that reads an image above, and the image reading control method includes: A loading detection step for controlling whether or not a document is loaded, and if the loading detection step detects that a document is loaded in the paper feed mechanism, the reading unit is placed at a shading correction position. And a control step of performing control.

In order to achieve the above object, the invention according to claim 15 is characterized in that in the control step, control is performed so that a desired image area with shading correction is read.

In order to achieve the above object, the invention according to a sixteenth aspect is characterized in that the invention has a document size detecting step for controlling to detect a size of a document loaded in the paper feeding mechanism.

[0035]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 4 is a diagram showing a configuration of an image reading apparatus equipped with an ADF according to an embodiment of the present invention and a document size detection position. An image reading apparatus according to an embodiment of the present invention is applied to a copying machine, and includes a paper feed tray 71, paper feed rollers 72, 73, guides 74, and 7.
6, 77, a transport roller 75, a paper discharge tray 78, a document guide 81, an ADF 70 having reflection sensors 82 and 83 (see FIG. 5), a document illumination lamp 201, and a first mirror 205.
Reading section 200 having an original, platen glass 203, second mirror 206, third mirror 207, lens 208, CCD2
09, shading correction plate 211, window 21
2. An operation unit having a copy start button (not shown) and the like are provided.

More specifically, the ADF 70 has a function of automatically and continuously replacing a large number of originals to be read, and is mounted on the image reading apparatus main body so as to be openable and closable. A plurality of documents can be placed on the paper feed tray 71. The paper feed rollers 72 and 73 feed the originals on the paper feed tray 71 one by one. Transport roller 75
Transports the document fed by the feed rollers 72 and 73. The guides 74, 77, 76 guide the document conveyed by the conveyance roller 75. On the paper output tray 78,
The document is ejected. The document table glass 203 is arranged below the paper discharge tray 78, and a document is placed thereon. The shading correction plate 211 is disposed below the paper discharge tray 78 and is used for shading correction. The window 212 is disposed below the transport roller 75,
The document conveyed by the conveyance roller 75 is the window 21
2, and is read by the reading unit 200.

The reading unit 200 is arranged inside the main body of the image reading apparatus.
Reference numeral 1 denotes a first mirror 2 of the reading unit 200 that irradiates the original with light.
Reference numeral 05 reflects reflected light from the original. Second mirror 2
06 reflects the reflected light from the first mirror 205, and the third mirror 207 reflects the reflected light from the second mirror 206. In this case, the lamp 201 and the first mirror 20
5, the second mirror 206 and the third mirror 207 are configured to be movable in the horizontal direction in the figure by a drive system (not shown). The lens 208 transmits the reflected light from the third mirror 207 and forms an image on the CCD 209. CCD 209
Is a photoelectric conversion element that converts light into an electric signal.

In the image reading apparatus equipped with the ADF 70 having the above configuration, the member arrangement state shown in FIG. 4 is set as a first home position. Then, the original is placed on the platen glass 203.
At the moment when the ADF 70 is closed by the operator, the document size detection is performed with the members arranged as shown in FIG.

The image reading apparatus 100 is provided with a pressure plate opening / closing detection sensor 101 as shown in FIG.
Is closed, and when the angle between the ADF 70 and the image reading apparatus main body becomes, for example, 30 degrees, the bar 102 provided in the image reading apparatus main body as shown in FIG.
The notch 103 of the bar 102 is sensed by the pressure plate
The closed state of F70 is detected.

Pressure plate open / close detection sensor 101 of image reading apparatus
Is input to an interrupt terminal of a CPU (not shown) (corresponding to the control means 5 in FIG. 1), and the image reading apparatus immediately determines the size of the original placed on the platen glass 203 by the method described above. Detect. Upon completion of the detection, the image reading apparatus changes the member arrangement to the arrangement shown in FIG. Thereafter, the operator waits for the operator to press the copy start button of the image reading apparatus, and at the timing when the copy start button is pressed,
Shading correction is performed while the member arrangement is kept in FIG. When the shading correction processing is completed, the members are arranged as shown in FIG. 7, that is, the reading unit 200 is arranged at the start position, and the reading unit 200 is moved rightward in FIG.
Read the original image.

Next, the ADF 7 mounted on the image reading apparatus
The reading sequence of the image reading apparatus when a document is placed on the zero paper feed tray 71 will be described. When a document is placed on the paper feed tray 71 by the operator,
The fact that the document is placed on the paper feed tray 71 is detected by the reflection sensor 83 shown in FIG. In FIG. 5, the size of the document is detected based on whether or not the document is over the reflective sensor 82 and the detection of the width setting of the guide 81 by the user. The detection state is notified to the image reading apparatus, and the image reading apparatus changes the member arrangement shown in FIG. 4 to the member arrangement shown in FIG. 6, and moves the reading unit 200 directly below the shading correction plate 211.

Thereafter, the operator waits for the operator to press the copy start button of the image reading apparatus, and at the timing when the copy start button is pressed, shading correction is performed with the member arrangement shown in FIG. After the shading correction processing is completed, the member arrangement shown in FIG.
Reading of the fed document is started by F70.

FIG. 1 is a functional block diagram showing a configuration corresponding to the claims in the image reading apparatus according to the embodiment of the present invention. The image reading apparatus according to the embodiment of the present invention includes a reading unit 1 (reading unit 200), a photoelectric conversion unit 2 (CCD 209), an open / close detection unit 3 (pressing plate open / close detection sensor 101), and a document size detection unit 4 (reflection type). Sensor 8
2) It has control means 5 (CPU). Note that the configuration shown in FIG. 1 shows essential components, and a drive system for moving the reading unit 1 and an image processing system for performing shading correction processing and the like are omitted.

The reading means 1 irradiates the original with light and guides the optical image to the photoelectric conversion means 2. The photoelectric conversion unit 2 performs photoelectric conversion for converting the guided optical image into an electric signal. The opening / closing detecting means 3 includes an ADF 70 mounted on the image reading apparatus.
(In the case of an image reading device equipped with an original pressure plate, the original pressure plate)
Detect opening and closing. The document size detecting means 4 detects the size of the document.

When it is detected that the ADF 70 (or the document pressure plate) is open, the control unit 5 reads the reading unit 200.
Is arranged at the document size detection position, and when it is detected that the ADF 70 (or the document pressure plate) is about to be closed, the reading unit 200 is arranged at the shading correction position, and a desired image area with shading correction is read. And the control for detecting the document size by the photoelectric conversion means 2 is executed. Further, the control means 5 executes processing (processing algorithm) shown in the flowcharts of FIGS. 2 and 3 described below.

FIG. 11 is an explanatory diagram showing a conceptual example in which a program and related data according to the embodiment of the present invention are supplied from a storage medium to an apparatus. The program and related data are stored in a storage medium 11 such as a floppy disk or a CD-ROM.
01 is inserted into a storage medium drive insertion slot 1103 provided in the apparatus 1102. After that, the program and related data are temporarily installed from the storage medium 1101 to the hard disk, and
, Or by directly loading the RAM without installing it on the hard disk, the program and related data can be executed.

In this case, when the program is executed in the image reading apparatus according to the embodiment of the present invention, the program and the related data are supplied to the image reading apparatus according to the procedure shown in FIG. By storing a program and related data in the image reading apparatus in advance, the program can be executed.

FIG. 10 is an explanatory diagram showing a configuration example of the storage contents of a storage medium storing a program and related data according to the embodiment of the present invention. The storage medium includes storage contents such as volume information 1001, directory information 1002, a program execution file 1003, and a program-related data file 1004. The program is
This is program-coded based on flowcharts shown in FIGS. 2 and 3 described later.

Next, the operation of the image reading apparatus according to the embodiment of the present invention configured as described above will be described in detail with reference to the flowcharts of FIGS. In the figure,
The same processing routine is given the same step number.

First, the document A is attached to the image reading apparatus.
A reading operation in the case of being placed on the DF 70 will be described. Step S1: When the power of the image reading apparatus is turned on, the reading unit 200 is moved to the document size detection position and initialization is performed (so far, the same operation is performed even if the document is not placed on the ADF 70). Step S2:
Detects whether a document is placed on the ADF 70,
It is checked that a document is placed on the DF 70 (proceed in the direction of arrow YES). Step S9: ADF 70 performs document size detection. Step S5: The reading unit 200 is moved to the shading correction position.

Step S3: Wait for a reading start command such as a copy start button to be input by the operator (if no command is input, proceed to NO and continue to wait for command input; if a command is input, proceed to YES). Step S6: Execute shading correction processing. Step S7: Reading unit 20 at start position
Move 0. Step S10: ADF reading is started (the reading unit 200 is fixed at the start position).
The above is the reading sequence when a document is placed on the ADF 70.

When reading the original on the original platen glass 203, the process proceeds to NO in step S2. In this case, the process proceeds to the sequence of step S11 in FIG. Hereinafter, the sequence of step S11 will be described. Step S11: A
The open / close state of the DF 70 is detected by the pressure plate open / close detection sensor 101. If the ADF 70 is closed, proceed to YES.
Step S4: A document size is detected on the image reading device side. Step S5: Read unit 2 at shading correction position
Move 00.

Step S3: Wait for a reading start command such as a copy start button to be input by the operator (if no command is input, proceed to NO and continue to wait for command input; if a command is input, proceed to YES). Step S6: Execute shading correction processing. Step S7: Reading unit 20 at start position
Move 0. Step S8: The reading unit 200 is moved to read the original. The above is the platen glass 2
This is a reading sequence when a document is placed on the original 03.

In the case of ADF reading, if the original is ADF7
Since the document size is detected at the moment the document is placed at 0, the document size is detected and the shading correction position of the optical system is sufficiently moved between the time the operator places the document and the time the copy start button is pressed. Can be terminated.

Also, when reading the original on the original platen glass 203, the operator
After the DF70 makes an angle of 30 degrees with the image reading device,
In a time period until the ADF 70 is completely closed and the copy start button is pressed, the document size detection and the movement of the shading correction position of the optical system can be sufficiently completed.

That is, in both the case of reading the ADF and the case of reading the document on the platen glass 203, the size of the placed document is detected and the shading is immediately performed until the operator presses the copy start button. Since the members are arranged at positions where correction can be performed,
First copy time can be minimized.

As described above, according to the image reading apparatus according to the embodiment of the present invention, the reading section 200 irradiates the original with light and guides the reflected light from the original, and the reading section 200 guides the light. CCD 209 that performs photoelectric conversion based on the reflected light
And a pressure plate open / close detection sensor 101 for detecting opening / closing of the ADF 70 (or document pressure plate). When the pressure plate open / close detection sensor 101 detects that the ADF 70 (or document pressure plate) is open, the reading unit 200 is switched to the document. ADF is placed at the size detection position and the ADF is
When it is detected that the document 70 (or the document pressure plate) is about to be closed, control is performed to dispose the reading unit 200 at the shading correction position.

The home position is set as a document size detection position, and a pressure plate open / close detection sensor 101 for detecting that the ADF 70 (or document pressure plate) is about to be closed is provided. The ADF 70 (or document pressure plate) is detected by the pressure plate open / close detection sensor 101. The size of the document placed on the platen glass 203 is detected at the moment when the closing is detected, and after the detection is completed, the member is moved to the shading correction position. When reading the original by automatically feeding the original, or when reading the original on the original platen glass 203 held down by the original pressing plate, no unnecessary processing time is added to the reading time.

That is, in the embodiment of the present invention, A
When reading using the DF 70, the platen glass 20
Even if a document is placed on the document and the document is pressed by the document pressure plate, the size of the placed document is detected before the operator presses the copy start button, and the document is read to a position where shading correction can be performed immediately. Part 2
Since the control of allocating 00 is performed, the first copy time can be shortened.

[Other Embodiments] (1) In the above embodiment of the present invention, the ADF
An example of an image reading apparatus that automatically feeds an original and reads the original is described as an example, but the present invention is not limited to an image reading apparatus equipped with an ADF. The present invention can also be applied to an image reading device that performs reading.

(2) In the above-described embodiment of the present invention, the closed state of the ADF 70 is detected when the angle between the ADF 70 and the main body of the image reading apparatus becomes 30 degrees. The present invention is not limited to the above-described angle, and when the angle between the ADF 70 and the image reading device body becomes a predetermined angle other than the above-mentioned 30 degrees, the ADF 70
It is also possible to configure so as to detect the closed state of the camera.

(3) In the above-described embodiment of the present invention, the case of the image reading apparatus provided in the copying apparatus has been described as an example. However, the present invention is not limited to the image reading apparatus alone. Instead, the present invention can be applied to a copying apparatus equipped with the image reading apparatus of the present invention.

(4) In the above-described embodiment of the present invention, the case of a single image reading device (single copying device) is taken as an example, but the present invention is applied to a single image reading device (single copying device). The present invention is not limited to the image reading apparatus (copying apparatus equipped with the image reading apparatus) of the present invention, a printing apparatus (printer) for printing the read image data, an information processing apparatus (computer) for processing the read image data, and the like. It is also possible to apply the present invention to a system connected with.

The present invention may be applied to a system constituted by a plurality of devices or to an apparatus constituted by a single device. A storage medium storing software program codes for realizing the functions of the above-described embodiments is supplied to a system or apparatus, and a computer (or CPU or MPU) of the system or apparatus is stored in a medium such as a storage medium. It goes without saying that this can also be achieved by reading and executing the program code.

In this case, the program code itself read from a medium such as a storage medium realizes the function of the above-described embodiment, and the medium such as a storage medium storing the program code constitutes the present invention. Will be. Examples of a medium such as a storage medium for supplying the program code include a floppy disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, a ROM, and a download. Can be used.

When the computer executes the readout program code, not only the functions of the above-described embodiment are realized, but also the OS or the like running on the computer is actually executed based on the instructions of the program code. It goes without saying that a part or all of the above-described processing is performed, and the functions of the above-described embodiments are realized by the processing.

Further, after the program code read from a medium such as a storage medium is written into a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the program code is read out. It is needless to say that a CPU or the like provided in the function expansion board or the function expansion unit performs part or all of the actual processing based on the above, and the functions of the above-described embodiments are realized by the processing.

[0069]

As described above, according to the image reading apparatus of the first to fourth aspects, when the opening / closing detecting means detects the closing operation of the original pressure plate (or the paper feeding mechanism), the reading means is switched to the original. It is configured to perform document size detection at the size detection position and then perform control to arrange the reading means at the shading correction position, so that until the operator instructs the image reading device to start image reading, Since the control for arranging the reading means at the position where the shading correction can be promptly performed by detecting the size of the placed document is performed, it is possible to reduce the time required for image reading.

Further, according to the copying apparatus of the present invention, by mounting the image reading apparatus on the copying apparatus, the copying apparatus can be mounted until the operator presses the copy start button of the copying apparatus. Since the control of arranging the reading means at the position where the shading correction can be promptly performed by detecting the size of the placed document is performed, the first copy time in the copying apparatus can be shortened.

According to the image reading control method of the ninth to twelfth aspects, by executing the image reading control method in the image reading apparatus, the first copy time can be reduced in the same manner as described above. To play.

According to the storage medium of the present invention, the first copy time can be reduced by reading the image reading control method from the storage medium and executing the method by the image reading apparatus. It has the effect of being able to.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a configuration corresponding to the claims in an image reading apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating a processing algorithm of the image reading apparatus according to the embodiment of the present invention.

FIG. 3 is a flowchart illustrating a processing algorithm of the image reading apparatus according to the embodiment of the present invention.

FIG. 4 is a configuration diagram showing a configuration of an image reading apparatus equipped with an ADF according to an embodiment of the present invention and showing a document size detection position.

FIG. 5 illustrates an AD of the image reading apparatus according to the embodiment of the invention.
FIG. 3 is a top view illustrating a configuration when F is viewed from above.

FIG. 6 is a configuration diagram showing a configuration of an image reading apparatus equipped with an ADF according to the embodiment of the present invention and showing a shading correction position.

FIG. 7 is a configuration diagram showing a configuration of an image reading apparatus equipped with an ADF according to the embodiment of the present invention and showing a reading position.

FIG. 8 is a configuration diagram showing a configuration of a pressure plate open / close detection sensor of the image reading apparatus according to the embodiment of the present invention;

FIG. 9 is a configuration diagram illustrating a configuration of a pressure plate open / close detection sensor of the image reading device according to the embodiment of the present invention;

FIG. 10 is an explanatory diagram showing a configuration example of storage contents of a storage medium storing a program and related data according to the embodiment of the present invention.

FIG. 11 is an explanatory diagram showing a conceptual example in which a program and related data according to an embodiment of the present invention are supplied from a storage medium to an apparatus.

FIG. 12 is a configuration diagram showing a configuration of an image reading apparatus without an ADF and showing a shading correction position.

FIG. 13 is a configuration diagram illustrating an arrangement of a document size detection sensor of the image reading apparatus.

FIG. 14 is an explanatory diagram illustrating a determined document size with respect to a detection state of a document size detection sensor of the image reading apparatus.

FIG. 15 is a configuration diagram showing a configuration of an image reading apparatus without an ADF and showing a document size detection position.

FIG. 16 is a configuration diagram showing a configuration of an image reading apparatus without an ADF and showing a start position.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 reading means 2 photoelectric conversion means 3 open / close detection means 4 document size detection means 5 control means 70 ADF 82, 83 reflection type sensor 101 pressure plate open / close detection sensor 200 reading unit 203 document table 209 CCD 210 document pressure plate

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06T 1/00 430 G06T 1/00 430J H04N 1/19 H04N 1/04 103E (72) Inventor Katsuhiro Ishido Tokyo 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Noriaki Matsui 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Takeshi Aoyama, Inventor Ota-ku, Tokyo 3-30-2 Shimomaruko Canon Inc. (72) The inventor Akihiro Kashiwara 3-30-2 Shimomaruko 3-chome, Ota-ku, Tokyo Inside the Canon Co., Ltd. (72) Nobuo Matsuoka 3-30, Shimomaruko, Ota-ku, Tokyo No. 2 within Canon Inc. (72) Inventor Tsunao Motobo 3-30-2 Shimomaruko, Ota-ku, Tokyo F-TA within Canon Inc. 2H076 BA07 BA24 BA35 BA36 BA62 BB02 BB04 2H108 AA01 AA05 AA19 CB01 FA01 FA21 5B047 AA01 BA01 BA02 BA08 CA12 CB12 5C072 AA01 BA03 BA08 FB12 LA07 LA18 MB04 RA01 RA20 UA02 UA11 XA01

Claims (16)

[Claims] An original pressing plate for pressing an original on a platen;
Reading means for reading an image on the document pressed by the document pressure plate, open / close detection means for detecting opening / closing operation of the document pressure plate, and reading when the closing operation of the document pressure plate is detected by the open / close detection means Control means for arranging means at a document size detection position to execute document size detection, and thereafter performing control to arrange the reading means at a shading correction position. 2. A paper feeding mechanism which is attached to an image reading apparatus main body so as to be openable and closable and automatically feeds a document, reading means for reading an image on the document fed by the paper feeding mechanism, and the paper feeding mechanism And a control for disposing the reading means at a shading correction position when the loading detection means detects that a document is loaded in the paper feed mechanism. An image reading apparatus, comprising: a control unit that performs the following. 3. The image reading apparatus according to claim 1, wherein the control unit performs control for reading a desired image area with shading correction. 4. The image reading apparatus according to claim 2, further comprising a document size detecting means for detecting a size of the document loaded in the paper feeding mechanism. 5. A document pressing plate for pressing a document on a platen;
A reading device for reading an image on a document pressed by the document pressing plate, wherein the copying device forms an image read by the reading device on a recording medium, and detects an opening / closing operation of the document pressing plate. Opening / closing detection means, when the closing operation of the document pressure plate is detected by the opening / closing detection means, arranging the reading means at the document size detection position and performing document size detection, and thereafter moving the reading means to the shading correction position And a control means for controlling the arrangement. 6. A paper feeding mechanism which is attached to an image reading apparatus main body so as to be openable and closable and automatically feeds an original, and reading means for reading an image on the original fed by the paper feeding mechanism, A copying apparatus for forming an image read by a reading unit on a recording medium, comprising: a loading detection unit configured to detect whether a document is loaded in the paper feeding mechanism; A copying apparatus, comprising: a control unit that controls the reading unit to be positioned at a shading correction position when it is detected that a document is loaded. 7. The copying apparatus according to claim 5, wherein the control unit performs control to read a desired image area with shading correction. 8. The copying apparatus according to claim 6, further comprising document size detecting means for detecting a size of a document loaded in said paper feeding mechanism. 9. A document pressing plate for pressing a document on a platen,
An image reading control method applied to an image reading apparatus having reading means for reading an image on a document pressed by the document pressing plate, comprising: an opening / closing detecting step of detecting an opening / closing operation of the document pressing plate; A control step of arranging the reading means at the original size detection position to execute the original size detection when the closing operation of the original pressure plate is detected by the step, and thereafter performing control to arrange the reading means at the shading correction position; and An image reading control method comprising: 10. An image reading apparatus having a sheet feeding mechanism which is attached to an image reading apparatus body so as to be openable and closable and automatically feeds a document, and reading means for reading an image on the document fed by the sheet feeding mechanism. An image reading control method according to claim 1, wherein a loading detection step of detecting whether a document is loaded in said paper feed mechanism, and that the document is loaded in said paper feed mechanism by said loading detection step. A control step of performing a control for disposing the reading means at a shading correction position when the detection is detected. 11. The image reading control method according to claim 9, wherein in the control step, control is performed to read a desired image area with shading correction. 12. The image reading control method according to claim 10, further comprising a document size detecting step of detecting a size of a document loaded in said paper feeding mechanism. 13. A program for executing an image reading control method applied to an image reading apparatus having a document pressing plate for pressing a document on a document table and reading means for reading an image on the document pressed by the document pressing plate. A computer readable storage medium, wherein the image reading control method includes an opening / closing detection step of controlling the opening / closing operation of the document pressure plate, and a closing operation of the document pressure plate by the opening / closing detection step. A control step of arranging the reading means at a document size detection position to execute document size detection when the detection is detected, and thereafter controlling the reading means to be arranged at a shading correction position. Medium. 14. An image reading apparatus having a sheet feeding mechanism which is attached to an image reading apparatus main body so as to be openable and closable and automatically feeds a document, and reading means for reading an image on the document fed by the sheet feeding mechanism. A computer-readable storage medium storing a program that executes an image reading control method applied to the image processing apparatus, and the image reading control method controls to detect whether a document is loaded in the paper feed mechanism. A loading detection step; and a control step of controlling the reading unit to be positioned at a shading correction position when the loading detection step detects that a document is loaded in the paper feed mechanism. Storage medium. 15. The storage medium according to claim 13, wherein in the control step, control is performed so as to read a desired image area with shading correction. 16. The storage medium according to claim 14, further comprising a document size detecting step of controlling to detect a size of the document loaded in said paper feeding mechanism.