Image reading apparatus improving the joining state of a plurality of image data obtained by dividing and reading out an original image
First Claim
1. An image reading apparatus that reads out image data of each of a plurality of divisional regions of an original image in reading out an original image of an original document mounted on said apparatus wherein the original document has a size which is greater than an image readable region which is readable by said apparatus, said apparatus comprising:
- a scanner which reads out image data sequentially for each of said plurality of divisional regions of said original image so that the thus read image data for a respective divisional region includes the respective divisional region partially overlapped with respect to each divisional region adjacent to said respective divisional region;
a memory which stores said thus read image data for each divisional region in correspondence to a position of the respective divisional region with respect to the original image, anda controller which identifies an overlapping region where a respective divisional region is overlapped with a divisional region adjacent to said respective divisional region, and joins the thus read image data for said divisional regions according to the thus identified overlapping regions in order to generate a composite image of said divisional regions;
wherein said controller identifies an overlapping region by making a determination of the position of each respective divisional region with respect to the original image by detecting an offset amount between a mounted position of said original document on said apparatus and a scan starting position of said scanner when scanning each respective one of the plurality of divisional regions, and comparing the position of each said divisional region and a size of the original document to identify an overlapping region.
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Abstract
In reading out an original image divided into a plurality of regions, a scanner reads out image data having each divided region partially repeated for each adjacent divided region. The read out image data of each divided region is stored in a memory in correspondence with the original image and stored in a memory. A controller identifies an overlapping region of the stored image data, and joins each image data according to the identified result to generate an image data corresponding to the original image.
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Citations
5 Claims
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1. An image reading apparatus that reads out image data of each of a plurality of divisional regions of an original image in reading out an original image of an original document mounted on said apparatus wherein the original document has a size which is greater than an image readable region which is readable by said apparatus, said apparatus comprising:
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a scanner which reads out image data sequentially for each of said plurality of divisional regions of said original image so that the thus read image data for a respective divisional region includes the respective divisional region partially overlapped with respect to each divisional region adjacent to said respective divisional region; a memory which stores said thus read image data for each divisional region in correspondence to a position of the respective divisional region with respect to the original image, and a controller which identifies an overlapping region where a respective divisional region is overlapped with a divisional region adjacent to said respective divisional region, and joins the thus read image data for said divisional regions according to the thus identified overlapping regions in order to generate a composite image of said divisional regions; wherein said controller identifies an overlapping region by making a determination of the position of each respective divisional region with respect to the original image by detecting an offset amount between a mounted position of said original document on said apparatus and a scan starting position of said scanner when scanning each respective one of the plurality of divisional regions, and comparing the position of each said divisional region and a size of the original document to identify an overlapping region. - View Dependent Claims (2, 3, 4, 5)
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Specification