Image reading apparatus and control method of image reading apparatus

• US 20060221411A1
• Filed: 03/28/2006
• Published: 10/05/2006
• Est. Priority Date: 03/31/2005
• Status: Active Grant

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Aoki, Nobushige
• Granted Patent: US 8,482,785 B2
• Time in Patent Office: Days
• US Class Current: 358/474
• CPC Class Codes: H04N 1/00795 Reading arrangements details of scanning heads H04N1/024; scanning arrangements therefor H04N1/04
• CPC Class Codes: H04N 1/00806 According to type of the original, e.g. colour paper or transparency, or reading a plurality of different types of original
• CPC Class Codes: H04N 1/00816 Determining the reading area, e.g. eliminating reading of margins

Abstract

An image reading apparatus in which when one or a plurality of original sheets are put on an original plate and are read, a desired image can be automatically cropped without previously setting a cropping method by a user is provided. A control method of such an image reading apparatus is also provided. The image on the original plate is read. The type of original sheet is discriminated on the basis of color characteristics information of the read image on the original plate. One of plural read image cropping methods is selected in accordance with the discriminated original sheet type. The read image on the original plate is cropped by the selected cropping method.

Claims

1. An image reading apparatus comprising:

reading means adapted to read an image on an original plate with respect to one or a plurality of original sheets put on the original plate;

analyzing means adapted to analyze color characteristics information of the image on the original plate read by said reading means;

discriminating means adapted to discriminate a type of the original sheet on the basis of an analysis result of said analyzing means;

cropping selecting means adapted to select one of a plurality of read image cropping methods in accordance with the original sheet type discriminated by said discriminating means; and

cropping means which has a plurality of methods of cropping the images from the image on the original plate and crops the image on the original plate read by said reading means by the cropping method selected by said cropping selecting means.

2. An apparatus according to claim 1, wherein said cropping means executes a first cropping method of cropping only one image and a second cropping method of cropping one or a plurality of images.

3. An apparatus according to claim 1, wherein said discriminating means discriminates whether a type of the image on the original plate is the type of the original sheet such as “

picture”

, “

text”

, or “

others”

.

4. An apparatus according to claim 2, wherein said discriminating means discriminates whether a type of the image on the original plate is the type of the original sheet such as “

picture”

, “

text”

, or “

others”

.

5. An apparatus according to any one of claims 2 to 4, wherein if said discriminating means determines that the type of the original sheet is “

text”

or “

others”

, said cropping means executes the first cropping method of cropping only one image, and if the type of the original sheet is “

picture”

, said cropping means executes the second cropping method of cropping one or a plurality of images.

6. An apparatus according to claim 1, further comprising color correcting process selecting means adapted to select a color correction processing method of the cropped original sheet in accordance with the type of the original sheet discriminated by said discriminating means.

7. A control method of an image reading apparatus, comprising:

a reading step of reading an image on of an original plate with respect to one or a plurality of original sheets put on the original plate;

an analyzing step of analyzing color characteristics information of the image on the original plate read in said image reading step;

a discriminating step of discriminating a type of the original sheet on the basis of an analysis result of said analyzing step;

a cropping selecting step of selecting one of a plurality of read image cropping methods in accordance with the original sheet type discriminated in said discriminating step; and

a cropping step which has a plurality of methods of cropping the images from the image on the original plate and crops the image on the original plate read in said reading step by the cropping method selected in said cropping selecting step.

8. A method according to claim 7, wherein in said cropping step, a first cropping method of cropping only one image and a second cropping method of cropping one or a plurality of images are executed.

9. A method according to claim 7, wherein in said discriminating step, whether the type of the image on the original plate is the type of the original sheet such as “

picture”

, “

text”

, or “

others”

is discriminated.

10. A method according to claim 8, wherein in said discriminating step, whether the type of the image on the original plate is the type of the original sheet such as “

picture”

, “

text”

, or “

others”

is discriminated.

11. A method according to any one of claims 8 to 10, wherein in said cropping step, if it is determined in said discriminating step that the type of the original sheet is “

text”

or “

others”

, the first cropping method of cropping only one image is executed, and if the type of the original sheet is “

picture”

, the second cropping method of cropping one or a plurality of images is executed.

12. A method according to claim 7, further comprising a color correcting process selecting step of selecting a color correction processing method of the cropped original sheet in accordance with the type of the original sheet discriminated in said discriminating step.