Image reading apparatus

• US 10,412,248 B2
• Filed: 12/12/2017
• Issued: 09/10/2019
• Est. Priority Date: 12/01/2015
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Mizude, Kazuhiro, Ogawa, Kazuma, Fujisaki, Tatsuya
• Primary Examiner(s): Vo, Quang N
• Application Number:
  US15/838,521
• Publication Number:
  US 20180103169A1
• Time in Patent Office: 637 Days
• CPC Class Codes: H04N 1/00708 Size or dimensions
• CPC Class Codes: H04N 1/00734 Optical detectors
• CPC Class Codes: H04N 1/00748 Detecting edges, e.g. of a stationary sheet
• CPC Class Codes: H04N 1/00753 of a sheet relative to a particular backgroud
• CPC Class Codes: H04N 1/00758 using a prescan
• 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 1/00811 according to user specified instructions, e.g. user selection of reading mode
• CPC Class Codes: H04N 1/00816 Determining the reading area, e.g. eliminating reading of margins
• CPC Class Codes: H04N 1/38 Circuits or arrangements for blanking or otherwise eliminating unwanted parts of pictures H04N1/387 takes precedence
• CPC Class Codes: H04N 1/3873 defined only by a limited number of coordinate points or parameters, e.g. corners, centre; for trimming
• CPC Class Codes: H04N 2201/0081 Image reader H04N2201/0091 - H04N2201/0094 take precedence
• CPC Class Codes: H04N 2201/0094 Multifunctional device, i.e. a device capable of all of reading, reproducing, copying, facsimile transception, file transception

Abstract

An image reading apparatus comprising: an original reading unit configured to read an image of each of multiple originals placed on an original table in batch by a batch-scan; a cropping unit configured to crop an image of each original from an entire image which is read by the batch-scan; an image output unit configured to output a cropped image of each original; and a control unit configured to control the original reading unit, the cropping unit, and the image output unit, wherein the control unit makes the original reading unit read the image by a batch-scan in which an image density of an edge of each original is supposed to be lower than an image density of a reading-area outside of the original, and an area to be cropped is determined on the basis of a difference in the image density between the edge and the reading-area outside of the original.

Claims

1. An image reading apparatus comprising:

an original reading unit configured to read an image of each of multiple originals placed on an original table in batch by a batch-scan;

a cropping unit configured to crop an image of each original from an entire image which is read by the batch-scan;

an image output unit configured to output a cropped image of each original; and

a control unit configured to control the original reading unit, the cropping unit, and the image output unit,

wherein the control unit makes the original reading unit read the image by a batch-scan in which an image density of an edge of each original is supposed to be lower than an image density of a reading-area outside of the original, and an area to be cropped is determined on the basis of a difference in the image density between the edge and the reading-area outside of the original.

2. The image reading apparatus according to claim 1, further comprising

an original cover configured to be openable with respect to the original table, and

a cover open/close sensor configured to detect an open and close state of the original cover, wherein

the control unit allows the original reading unit to read the image by the batch-scan when the cover open-and-close sensor detects that the original cover is opened.

3. The image reading apparatus according to claim 2, wherein the control unit inhibits the original reading unit from reading the image by the batch-scan when the cover open-and-close sensor detects that the original cover is closed.