JP2002247392A - Image reader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image reader that can quickly process a read image appropriately to the type of an original by quickly discriminating the type of the original. SOLUTION: This image reader 1 quickly reads the original 5 by means of a first image inputting section 10 before a second image inputting section 11 reads the original 5 and discriminates the type of the original 5 in at least two or more types by means of a type-of-original discriminating section 16 based on the output data of the first image inputting section 10. Then the reader 1 changes the color correction by means of a color correcting section in accordance with the discriminated type of the original 5. Therefore, this image reader 1 can quickly discriminate the type of the original 5 without performing pre- scanning similar to normal scanning before the normal scanning unlike the conventional example and can quickly perform image reading and image processing in accordance with the type of the original 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an image reading apparatus, and more particularly, to an image reading apparatus which promptly determines the type of an original, performs appropriate reading for the type of the original, and promptly performs image processing.

[0002]

2. Description of the Related Art In an image reading apparatus, a pre-scan process is performed before a document reading operation is performed, and the type of a document (printed document) set in a reading unit by a document size detecting unit such as a photointerrupter. , Photographic paper originals, copy originals, inkjet originals, map originals, fluorescent originals, etc.)
Is automatically determined (Japanese Patent Laid-Open No.
98074, JP-A-08-130636,
JP-A-10-126632, JP-A-09-065
143, JP-A-07-177368, etc.).

Conventionally, an image reading apparatus that determines the size of a document at the time of a first scan has also been proposed (Japanese Patent Laid-Open No. 11-205747, Japanese Patent Laid-Open No. 4-113)
777 gazette).

[0004]

However, if the pre-scan is performed before the main scan to determine the type of the original as in such a conventional image reading apparatus, it is difficult to determine the type of the original. If a pre-scan is performed by the same reading unit as the main scan before the main scan, in a color image reading apparatus such as a one-drum digital color copier,
It is necessary to perform the prescan at least five times, and there is a problem that the time required from when the user presses the copy button to when the document is copied onto the transfer paper and output is increased.

[0005] Further, if an attempt is made to determine the type of the original at the time of the first scan, there is a problem that image deterioration occurs in the color plate at the time of the first scan.

Accordingly, the first aspect of the present invention is to provide a second image input device which reads a document and outputs image data. Before the means reads the original, the original is read by the first image input means for quickly reading the original and outputting data necessary to determine the type of the original, and the first image is read by the original type determining means. At least two or more document types are determined based on the data output from the input unit, and the color correction unit changes the color correction processing according to the determined document type, thereby performing a conventional scan as in the related art. Provided is an image reading apparatus that can quickly determine a document type without performing a pre-scan similar to a main scan, and can quickly perform image reading and image processing according to the document type. It is an object.

According to a second aspect of the present invention, the first image input means reads an original at a lower resolution than the second image input means, so that the main scan performed before the conventional main scan is performed. Compared to the same pre-scan,
It is an object of the present invention to provide an image reading apparatus capable of reading an original at a high speed, determining the type of the original more quickly, and performing more rapid image reading and image processing according to the type of the original.

According to a third aspect of the present invention, a plurality of originals are
When the document is conveyed by the automatic document feeder to the document reading position of the second image input means by separating the sheets one by one, the document being conveyed by the automatic document feeder is read by the first image input means, and the It is an object of the present invention to provide an image reading apparatus that can quickly determine a document type and perform image reading and image processing more quickly according to the document type.

According to a fourth aspect of the present invention, when an original on the contact glass is read by the second image input unit, the original on the contact glass is read by the first image input unit. Before scanning, the original is read instantaneously, the original on the contact glass is instantly read, and the type of the original is determined even faster.
It is an object of the present invention to provide an image reading apparatus that can perform image reading and image processing more quickly according to the type of a document.

According to a fifth aspect of the present invention, by disposing the first image input means below the contact glass, the backing original on the contact glass can be read efficiently and instantaneously, and the speed can be further increased. It is an object of the present invention to provide an image reading apparatus capable of determining a document type and performing image reading and image processing more quickly according to the document type.

According to the present invention, when the determination of the document type by the document type determination means is completed, the original reading operation by the first image input means is terminated, thereby eliminating unnecessary operation of the first image input means. It is another object of the present invention to provide an image reading apparatus capable of determining a document type at a higher speed, and performing image reading and image processing more quickly according to the document type.

According to a seventh aspect of the present invention, the document type determining means determines the type of the photographic paper original at a high speed by determining at least the types of the print original and the photographic paper original. It is an object of the present invention to provide an image reading apparatus capable of performing image reading and image processing.

According to an eighth aspect of the present invention, the document type determining means determines the type of the copy document at a high speed by determining at least the document type of the print document and the copy document, thereby enabling quick image reading according to the copy document. It is an object of the present invention to provide an image reading device capable of performing image processing.

According to a ninth aspect of the present invention, the document type determining means determines the map document at a high speed by determining at least the document types of the print document and the map document, thereby enabling quick image reading according to the map document. It is an object of the present invention to provide an image reading device capable of performing image processing.

According to a tenth aspect of the present invention, the document type determining means determines the fluorescent document at a high speed by determining at least the document types of the print document and the fluorescent document, and promptly responds to the fluorescent document. It is an object of the present invention to provide an image reading apparatus capable of performing image reading and image processing.

According to an eleventh aspect of the present invention, the document type determining means determines the ink jet document at a high speed by determining at least the document types of the print document and the ink jet document, thereby enabling quick image reading according to the ink jet document. It is an object of the present invention to provide an image reading device capable of performing image processing.

According to a twelfth aspect of the present invention, the document type determining means determines the document type in a tree structure manner, thereby determining the document type more efficiently and at high speed, and more quickly responding to the document type. It is an object of the present invention to provide an image reading apparatus capable of performing image reading and image processing.

[0018]

According to the first aspect of the present invention, there is provided an image reading apparatus comprising: first image input means for quickly reading an original and outputting data necessary for determining the type of the original; A second image input unit that reads image data and outputs image data; a color correction unit that performs a color correction process on the image data output by the second image input unit; and a data output by the first image input unit. Document type determining means for determining at least two or more types of the document, wherein the color correcting means changes the color correction processing according to the document type determined by the document type determining means. Achieves the above objectives.

According to the above arrangement, when the second image input means for reading the original and outputting the image data performs color correction processing on the image data of the read original by the color correction means, the second image input means converts the original into image data. Before reading, the original is read by the first image input unit that quickly reads the original and outputs data necessary for determining the type of the original,
Document type determination means determines at least two types of documents based on data output from the first image input means,
Since the color correction means changes the color correction processing according to the determined document type, it is possible to quickly determine the document type without performing the same pre-scan as the main scan before performing the main scan as in the related art. Thus, quick image reading and image processing can be performed according to the type of document.

In this case, for example, the first image input means may read the original at a lower resolution than the second image input means.

According to the above arrangement, the first image input means is
Since the original is read at a lower resolution than that of the second image input means, the original can be read at a higher speed compared to the pre-scan which is the same as the main scan performed before performing the conventional main scan. The type of the original can be determined quickly, and the image reading and image processing can be performed more quickly according to the type of the original.

For example, as set forth in claim 3, the image reading apparatus separates the plurality of documents one by one and transports the separated documents to a document reading position of the second image input means. Device, wherein the first image input means comprises:
The automatic document feeder may read the document being conveyed to the document reading position while the document is being conveyed.

According to the above arrangement, when a plurality of documents are separated one by one and conveyed to the document reading position of the second image input means by the automatic document conveyance device, the document conveyed by the automatic document conveyance device Is read by the first image input means, the type of the original can be quickly determined during the conveyance of the original, and the image reading and image processing can be performed more quickly according to the type of the original.

Further, for example, as set forth in claim 4, the image reading device includes a contact glass on which the document is placed, and a thick plate for pressing the document on the contact glass against the contact glass. The second image input means reads the original on the contact glass, and the first image input means reads the original on the contact glass instantly before the second image input means reads the original. The original may be read first.

According to the above arrangement, the second image input means includes:
When reading the original on the contact glass, the first image input means reads the original on the contact glass instantly before the second image input means reads the original. It is possible to read the document instantaneously and determine the type of the document at a higher speed, and to perform the image reading and the image processing more quickly according to the type of the document.

Further, for example, the first image input means may be arranged below the contact glass.

According to the above arrangement, the first image input means is
Since it is arranged below the contact glass, the backing original on the contact glass can be read efficiently and instantaneously, and the type of the original can be determined at a higher speed. Image reading and image processing can be performed.

Further, for example, when the determination of the document type by the document type determination means is completed, the image reading apparatus terminates the document reading operation by the first image input means. It may be something.

According to the above arrangement, when the determination of the document type by the document type determination means is completed, the document reading operation by the first image input means is terminated. The document type can be determined at high speed, and image reading and image processing can be performed more quickly according to the document type.

Further, for example, the document type determination means may determine at least a document type of a print document and a photographic paper document.

According to the above arrangement, since the document type determining means determines at least the document types of the print document and the photographic paper document, the photographic paper document can be determined at a high speed, and the photographic paper document can be quickly determined. Image reading and image processing can be performed.

Further, for example, the document type determination means may determine at least a document type of a print document and a copy document.

According to the above construction, the document type determining means determines at least the document types of the print document and the copy document, so that the copy document can be determined at a high speed, and the image can be read quickly according to the copy document. Image processing can be performed.

Further, for example, the document type determination means may determine at least a document type of a print document and a map document.

According to the above configuration, since the document type determining means determines at least the document types of the print document and the map document, the map document can be determined at a high speed, and the image can be read quickly according to the map document. Image processing can be performed.

Further, for example, the document type determining means may determine at least a document type of a print document and a fluorescent document.

According to the above configuration, since the document type determination means determines at least the document type of the print document and the fluorescent document, it is possible to determine the fluorescent document at a high speed, and to promptly determine the fluorescent document. Image reading and image processing can be performed.

Further, for example, the document type determination means may determine at least a document type of a print document and an ink jet document.

According to the above configuration, since the document type determination means determines at least the document type of the print document and the ink-jet document, it is possible to determine the ink-jet document at a high speed, and to quickly perform image reading according to the ink-jet document. Image processing can be performed.

Further, for example, the document type determining means may determine the document type by a tree structure method.

According to the above configuration, since the document type determining means determines the document type in the tree structure method, the document type can be determined more efficiently and at high speed, and the document type can be determined more quickly according to the document type. Image reading and image processing can be performed.

[0042]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. It should be noted that the embodiments described below are preferred embodiments of the present invention, and therefore, various technically preferable limitations are added. However, the scope of the present invention is not limited to the following description. The embodiments are not limited to these embodiments unless otherwise specified.

FIGS. 1 to 5 show a first embodiment of the image reading apparatus of the present invention. FIG. 1 shows an image to which the first embodiment of the image reading apparatus of the present invention is applied. Reader 1
FIG. 3 is a schematic configuration diagram around a reading unit of FIG.

In FIG. 1, the image reading apparatus 1 has a contact glass 3 disposed on an upper surface of a main body housing 2, and an ADF (ADF) which can open and close the surface of the contact glass 3 on the contact glass 3. An automatic document feeder 4 is provided. The ADF 4 moves a document table 6 on which a plurality of documents 5 are placed, a conveying roller 7 for feeding the document 5 on the document table 6 in the direction of the contact glass 3, and a document 5 sent from the conveying roller 7 as shown by an arrow in FIG. As shown in the figure, a transport roller 8 and a transport roller 9 for transporting on the contact glass 3 are provided.

A first image input section (first image input means) 10 for reading an image of the original 5 conveyed onto the contact glass 3 from the original plate 6 of the ADF 4 is provided in the main body housing 2.
Below the contact glass 3, a second image input unit (second image input means) 11 mounted on a traveling body movably disposed in the sub-scanning direction, which is the double arrow direction in FIG. The first image input unit 10 is disposed between the transport roller 7 and the transport roller 8, and is provided at this portion of the main body housing 2.
Although not shown, a reading window is formed. The first image input unit 10 reads the original 5 at a low resolution, for example, at a high speed to input an image, and the second image input unit 11 outputs the original 5
Is read at a high resolution to input an image.

As shown in FIG. 2, the image reading apparatus 1 includes the first image input unit 10 and the second image input unit 11, and has a scanner γ unit 12, a color correction unit 13,
Printer γ unit 14, image output unit 15, and document type determination unit 1
6 and so on.

The image reading device 1 outputs the image data of the original 5 read by the first image input unit 10 to the original type determining unit 16, and the original type determining unit (original type determining unit) 16 determines that the type of the original 5 is correct. It determines whether the document is a print document, a photographic paper document, a copy document, an ink jet document, a map document, a fluorescent document, or the like, and outputs it to the color correction unit 13.

The image reading device 1 converts the image data of the original read by the second image input unit 11 into a scanner γ unit in parallel with the original type determination process by the first image input unit 10 and the original type determination unit 16. At 12, the scanner γ is applied. The scanner γ converts RGB image data that depends on the second image input unit 11 into standard RGB image data.

The scanner γ unit 12 outputs the RGB image data subjected to the scanner γ to the color correction unit 13,
Reference numeral 3 converts the standard RGB image data into the standard YMCK image data and outputs it to the printer γ unit 14.

The color correction section (color correction means) 14 converts the standard RGB image data into the standard YMCK image data using the color correction coefficients in the color correction processing. The correction coefficient is changed according to the determination result of the document type determination unit 16, and color correction conversion processing corresponding to the type of the document 5 (document type) is performed.

The printer γ unit 14 converts the standard YMCK image data into YMCK image data that has the characteristics of the image output unit 15.

The image output section 15 causes an output section of a printer or the like to form an image on transfer paper based on the YMCK image data input from the printer γ section 14.

Next, the operation of the present embodiment will be described. When the original 5 is set on the original platen 6 of the ADF 4 and a start key is turned on by an operation unit (not shown), the image reading device 1 transports the original 5 on the original platen 6 by the transport rollers 7 and 8. The conveyance is started one by one, and as shown in FIG.
The first image input unit 10 reads the conveyed original 5 and starts an original type determination process of determining the type (original type) of the original 5 by the original type determination unit 16 (step S101).

When the first image input unit 10 reads the original 5, the original type determination unit 16 determines the original type (step S102), and checks whether the original type determination is completed (step S103). If the determination of the document type is not completed in step S103, the document 5 is conveyed at a low speed, and the process returns to step S102 to continue the document type determination.

This document type determination is performed by a conventional document type determination method. For example, if the document 5 is a copy document,
Judgment is made based on the presence or absence of a tracking pattern.
A method of making a determination using a histogram of colors used and a method of making a determination of a fluorescent color or an inkjet using a histogram of document colors similarly to a map document can be used.

In the document type determination by the document type determination unit 16, the document type determination may be performed structurally as shown in FIG. In this case, the document type determination is divided into generation document determination and non-generation document determination, and a copy document determination and an inkjet document determination are performed in the generation document determination, and a fluorescent color document determination and a map document determination are performed in the non-generation document determination. The determination, the photographic paper document determination, and the print document determination are performed. When the document type is structurally determined as described above, the speed of reaching the corresponding document type can be improved as compared with the case where the document types are determined one by one.

In step S103, when the document type determination by the document type determination unit 16 is completed, the transport speed of the document 5 is switched to high-speed transport and transported onto the contact glass 3 (step S105). When the document 5 is conveyed, the image of the document 5 is read by the second image input unit 11 disposed below the contact glass 3.

The image of the original 5 read by the second image input unit 11 is subjected to the scanner γ by the scanner γ unit 12, output to the color correction unit 13, and output to the color correction unit 13 by using the color correction coefficient. Is converted into standard YMCK image data, that is, for example, a matrix operation from RGB space to YMCK space is performed.

In this image data conversion, as shown in FIG. 5, the color correction unit 13 performs a matrix operation on the standard RGB image data and converts the color correction coefficients into standard YMCK image data. The color correction coefficient is switched according to the determination result of the document type determination unit 16. For example, in the document type determination, if the model can be specified by the tracking pattern, the color correction coefficient is adjusted so that the YMCK space is expanded or narrowed to the color range that can be output by the model.

As described above, in the image reading apparatus 1 of the present embodiment, the first image input unit 10 quickly reads the original 5 before the second image input unit 11 reads the original 5,
Based on the data output from the image input unit 10, the document type determination unit 16 determines at least two types of the document 5, and changes the color correction processing in the color correction unit according to the determined document type. I have.

Therefore, it is possible to quickly determine the document type without performing the same pre-scan as in the main scan before performing the main scan as in the related art, and to perform rapid image reading and image processing according to the document type. It can be carried out. In particular, by adjusting the color correction coefficient, it is possible to obtain a high-quality image according to the document type.

Further, the image reading apparatus 1 of the present embodiment
As the first image input unit 10, a unit that reads a document at a lower resolution than the second image input unit 11 is used.

Therefore, the original 5 can be read at a higher speed and the type of the original can be determined more quickly than in the case of the pre-scan which is the same as the main scan performed before the conventional main scan. Image reading and image processing can be performed more quickly according to the type.

Further, the image reading apparatus 1 of the present embodiment
Separates a plurality of originals 5 one by one and places AD on contact glass 4 which is the original reading position of second image input unit 11.
When the document 5 being transported by the ADF 4 is transported by the
The image is read by the image input unit 10.

Therefore, the document type can be quickly changed during the document conveyance.
Can be determined more quickly according to the type of document.
Image reading and image processing can be performed.

Further, the image reading apparatus 1 of the present embodiment
When the document type determination by the document type determination unit 16 is completed,
The document reading operation by the first image input unit 10 has been completed.

Therefore, the useless operation of the first image input unit 10 can be omitted, the type of the document can be determined more quickly, and the image reading and image processing can be performed more quickly according to the type of the document.

Further, the image reading apparatus 1 of the present embodiment
The document type determination unit 16 determines at least the document type of the print document and the photographic paper document, the document type of the print document and the copy document, the document type of the print document and the map document, the document type of the print document and the fluorescent document, and the print document. And the document type of the inkjet document.

Therefore, it is possible to judge a photographic paper original, a copy original, a map original, a fluorescent original, and an ink jet original at a high speed, and it is possible to quickly perform image reading and image processing according to each original.

Further, the image reading device 1 of the present embodiment
The document type determination unit 16 determines the document type by a tree structure method.

Therefore, the type of the original can be determined more efficiently and at a high speed, and the image reading and image processing can be performed more quickly according to the type of the original.

FIG. 6 is a diagram showing a second embodiment of the image reading apparatus of the present invention, in which a document type is determined based on digital data obtained by instantaneously photographing a document on a contact glass. In the description of the present embodiment, the description will be given using the reference numerals used in the description of the color image forming apparatus 1 of the first embodiment as necessary.

FIG. 6 is a schematic configuration diagram of the periphery of a reading section of an image reading apparatus 20 to which the second embodiment of the image reading apparatus of the present invention is applied.

Referring to FIG. 6, an image reading apparatus 20 has a contact glass 22 disposed on an upper surface of a main body housing 21, and a document 23 set on the contact glass 22 is placed above the contact glass 22. A thick plate 24 for close contact with the contact glass 22 is provided so as to be openable and closable.

A first image input unit (first image input means) 25 is provided below the contact glass 22 in the main body housing 21, and the first image input unit 25 is placed on the contact glass 22. The entire surface of the set document 23 is instantaneously photographed, converted into digital data, and output to the document type determination unit 16 similar to that of the first embodiment. As the first image input unit 25, for example, a digital camera or the like can be used.

Further, below the contact glass 22 in the main body housing 21, a second image input unit (second image input means) 11 mounted on a traveling body movably arranged in the sub-scanning direction. The second image input unit 11 reads the image of the original 23 on the contact glass 22,
Output to the scanner γ unit 12.

In the image reading apparatus 20 of the present embodiment, when the original 23 is set on the contact glass 22 and the start key is pressed, the first image input unit 25
Is instantaneously photographed, converted into digital data, and output to the document type determination unit 16. When the document type determination unit 16 determines the document type, the second image input unit 11 reads the document 23, and the color correction unit 13 performs color correction according to the document type in the same manner as in the first embodiment. Using the coefficients, the standard RG
The B image data is converted into standard YMCK image data.

As described above, in the image forming apparatus 20 of the present embodiment, the second image input unit 11 uses the contact glass 22
When reading the original 23, the first image input unit 25
Thus, the original 23 is instantly read from the original 23 on the contact glass 22 before the second image input unit 11 reads the original 23.

Therefore, the original 23 on the contact glass 22 can be read instantaneously, the type of the original can be determined more quickly, and image reading and image processing can be performed more quickly according to the type of the original.

The image reading apparatus 20 according to the present embodiment
Has the first image input unit 25 disposed below the contact glass 22.

Therefore, the backed-up document 23 on the contact glass 22 can be read efficiently and instantaneously, and the type of the document can be determined at a higher speed, and the image reading and image processing can be performed more quickly according to the type of the document. It can be performed.

Although the invention made by the present inventors has been specifically described based on the preferred embodiments, the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the gist of the invention. It goes without saying that it is possible.

For example, in each of the above embodiments, the color correction coefficient is changed by the color correction section 13 according to the type of the original. You may make it convert.

Further, in each of the above embodiments, the color correction coefficient of the color correction section 13 is changed according to the result of the document type determination. The printer γ table of the γ unit 14 may be changed.

[0085]

According to the image reading apparatus of the present invention, the second image input means for reading the original and outputting the image data performs color correction processing on the image data of the original read by the color correction means. At this time, before the second image input means reads the original, the original is read by the first image input means which quickly reads the original and outputs data necessary for determining the type of the original, and determines the type of the original. Means for determining at least two types of originals based on data output from the first image input means, and changing the color correction processing by the color correction means according to the determined original type. The document type can be quickly determined without performing a pre-scan similar to the main scan before performing the main scan, so that quick image reading and image processing according to the document type can be performed.

According to the image reading apparatus of the present invention, the first image input means reads the original at a lower resolution than the second image input means. Compared with the pre-scan, which is the same as the main scan that has been performed, the original can be read at a higher speed, the type of the original can be determined more quickly, and image reading and image processing can be performed more quickly according to the type of the original. be able to.

According to the image reading apparatus of the third aspect, when the plurality of originals are separated one by one and conveyed to the original reading position of the second image input means by the automatic original conveying device, the automatic original conveying device is used. Since the original being conveyed by the original conveyance device is read by the first image input means, the type of the original can be quickly determined during the conveyance of the original, and the image reading and image processing can be performed more quickly according to the type of the original. it can.

According to the image reading apparatus of the present invention, when the original on the contact glass is read by the second image input means, the original on the contact glass is read by the first image input means. Since the input means reads the document instantly before reading the document, the document on the contact glass can be read instantaneously, and the type of the document can be determined at a higher speed. Image reading and image processing can be performed.

According to the image reading apparatus of the present invention, since the first image input means is disposed below the contact glass, the backed original on the contact glass can be efficiently and instantaneously. By reading the document, the document type can be determined at a higher speed, and image reading and image processing can be performed more quickly according to the document type.

According to the image reading apparatus of the present invention, when the determination of the document type by the document type determining means is completed, the document reading operation by the first image input means is terminated. Useless operation can be omitted, the type of the document can be determined more quickly, and image reading and image processing can be performed more quickly according to the type of the document.

According to the image reading apparatus of the present invention, since the document type determining means determines at least the document type of the print document and the photographic paper document, the photographic paper document can be determined at a high speed. Quick image reading and image processing can be performed according to the photographic paper original.

According to the image reading apparatus of the present invention, since the document type determining means determines at least the document types of the print document and the copy document, the copy document can be determined at high speed. Image reading and image processing can be performed promptly according to.

According to the image reading apparatus of the ninth aspect, since the document type determining means determines at least the document types of the print document and the map document, the map document can be determined at a high speed. Image reading and image processing can be performed promptly according to.

According to the image reading apparatus of the tenth aspect, since the document type determining means determines at least the document types of the print document and the fluorescent document, the fluorescent document can be determined at a high speed. Quick image reading and image processing can be performed according to the fluorescent original.

According to the image reading apparatus of the present invention, since the document type determination means determines at least the document type of the print document and the ink-jet document, the ink-jet document can be determined at high speed. Image reading and image processing can be performed promptly according to.

According to the image reading apparatus of the twelfth aspect, since the document type determining means determines the document type by the tree structure method, the document type can be determined more efficiently and at high speed. Image reading and image processing can be performed more quickly according to the document type.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram around a reading unit of an image reading apparatus to which a first embodiment of the image reading apparatus of the present invention is applied.

FIG. 2 is a block diagram of the image reading apparatus of FIG. 1;

FIG. 3 is a flowchart illustrating a document type determination process performed by the image reading apparatus of FIG. 1;

FIG. 4 is a conceptual diagram of a structural document type determination process in a document type determination unit in FIG. 2;

FIG. 5 is a diagram showing a matrix operation from an RGB space to a YMCK space in the color correction unit of FIG. 2;

FIG. 6 is a schematic configuration diagram around a reading unit of the image reading apparatus to which the second embodiment of the image reading apparatus according to the present invention is applied.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 image reading device 2 main body housing 3 contact glass 4 ADF 5 document 6 document table 7, 8, 9 transport roller 10 first image input unit 11 second image input unit 12 scanner γ unit 13 color correction unit 14 printer γ unit 15 Image output unit 16 Document type determination unit 20 Image reading device 21 Main body housing 22 Contact glass 23 Document 24 Thick plate 25 First image input unit

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H04N 1/00 108 H04N 1/40 D 5C072 1/04 1/04 D 5C077 1/10 1/10 5C079 1/107 1 / 46 Z 1/46 F term (reference) 2H027 DB01 DE07 EA18 EB04 FA28 FB05 FB07 FD08 ZA07 2H030 AA02 AD07 AD12 AD16 2H076 BA01 BA07 BA13 BB10 EA01 5B057 AA11 BA02 CA01 CB01 CE17 5C062 AA05 AC17 BA53 AC24 LA07 NA08 QA16 XA01 5C077 LL18 LL19 MP08 PP15 PP20 PP32 PP33 PP37 PP71 PQ08 SS01 TT06 5C079 HB01 HB03 HB12 JA01 LA05 LB01 NA03 NA11 PA02

Claims (12)

[Claims] A first image input means for quickly reading a document and outputting data necessary for determining the type of the document; a second image input means for reading the document and outputting image data; Color correction means for performing a color correction process on the image data output from the second image input means, and document type determination means for determining at least two types of the document based on data output from the first image input means And
An image reading apparatus, wherein the color correction means changes the color correction processing according to the document type determined by the document type determination means. 2. An image reading apparatus according to claim 1, wherein said first image input means reads said document at a lower resolution than said second image input means. 3. The image reading device according to claim 1, further comprising an automatic document feeder for separating the plurality of documents one by one and feeding the separated documents to a document reading position of the second image input means. 3. The image reading device according to claim 1, wherein the automatic document feeder reads the document being conveyed to the document reading position while the document is being conveyed. 4. The image reading device according to claim 1, further comprising: a contact glass on which the document is placed; and a thick plate for pressing the document on the contact glass against the contact glass. The document is read on a glass, and the first image input unit reads the document on the contact glass instantaneously before the second image input unit reads the document. The image reading device according to claim 1 or 2. 5. An image reading apparatus according to claim 5, wherein said first image input means is provided below said contact glass. 6. The image reading apparatus according to claim 1, wherein when the determination of the document type by said document type determination means is completed, said document reading operation by said first image input means is terminated. 7. The image reading device according to any one of 6. 7. The image reading apparatus according to claim 1, wherein said document type determining means determines at least a document type of a print document and a photographic paper document. 8. The image reading apparatus according to claim 1, wherein said document type determination means determines at least the document types of a print document and a copy document. 9. An image reading apparatus according to claim 1, wherein said document type determining means determines at least a document type of a print document and a map document. 10. The image reading apparatus according to claim 1, wherein said document type determination means determines at least a document type of a print document and a fluorescent document. 11. An image reading apparatus according to claim 1, wherein said document type determination means determines at least the document types of a print document and an ink jet document. 12. The image reading apparatus according to claim 1, wherein said document type determination means determines said document type by a tree structure method.