公开(公告)号：US10169877B2

公开(公告)日：2019-01-01

申请号：US15482852

申请日：2017-04-10

Applicant: XEROX CORPORATION

Inventor： Mohan Palaniyappan ,  Sankaralingam Madasamy

IPC: G06T3/60 ,  G06T7/11 ,  H04N1/10 ,  H04N1/21 ,  G06T7/13 ,  G06T7/168 ,  G06T5/00

Abstract: The present disclosure discloses methods and systems (for example multi-function devices) for segmenting multiple documents from a single input image. The multi-functional device includes a controller unit having a boundary extraction module to process an input image having multiple documents. The processing is performed using a computer implemented sum of absolute difference (SAD) based edge detection technique, to identify potential edge pixels and the region of interest pixels of the plurality of document images. Based on the identified potential edge pixels, perimeter boundaries surrounding each of the plurality of document images are determined. The determined perimeter boundaries and ROI pixels (Image mask for each document) in the input image are then segmented to create separate pages or files for each of the documents present within the input image for the purpose of printing separate files.

公开(公告)号：US20180293731A1

公开(公告)日：2018-10-11

申请号：US15482852

申请日：2017-04-10

Applicant: XEROX CORPORATION

Inventor： Mohan Palaniyappan ,  Sankaralingam Madasamy

IPC: G06T7/11 ,  H04N1/10 ,  H04N1/21 ,  G06T7/13 ,  G06T7/168 ,  G06T5/00 ,  G06T3/60

CPC classification number: G06T3/60 ,  G06K9/3208 ,  G06K9/3233 ,  G06K9/4642 ,  G06T7/12 ,  G06T2207/20061 ,  G06T2207/30176 ,  H04N1/10 ,  H04N1/2166 ,  H04N2201/0094

Abstract: The present disclosure discloses methods and systems (for example multi-function devices) for segmenting multiple documents from a single input image. The multi-functional device includes a controller unit having a boundary extraction module to process an input image having multiple documents. The processing is performed using a computer implemented sum of absolute difference (SAD) based edge detection technique, to identify potential edge pixels and the region of interest pixels of the plurality of document images. Based on the identified potential edge pixels, perimeter boundaries surrounding each of the plurality of document images are determined. The determined perimeter boundaries and ROI pixels (Image mask for each document) in the input image are then segmented to create separate pages or files for each of the documents present within the input image for the purpose of printing separate files.

公开(公告)号：US09998628B1

公开(公告)日：2018-06-12

申请号：US15477145

申请日：2017-04-03

Applicant: XEROX CORPORATION

Inventor： Mohan Palaniyappan ,  Punitha Puttuswamy ,  Arindam Das

IPC: H04N1/40 ,  H04N1/387 ,  H04N1/409 ,  G06T5/00

CPC classification number: H04N1/4097 ,  G06T5/008 ,  G06T2207/10008 ,  G06T2207/10024 ,  G06T2207/30176 ,  H04N1/387 ,  H04N1/4092

Abstract: Disclosed are methods and multi-function devices for auto-correction of shadow effects in a scanned image. The method includes receiving a first image including a colored twin-page scanned document including at least one of a shadow region in a central part of the first image, at least one darker region caused at one or more borders of the first image, and distorted orientation with respect to a base of the first image; re-positioning the shadow region present in the central part to generate a re-positioned first binary image such that the shadow region becomes perpendicular to the base; detecting a shadow region in a central region of the re-positioned first binary image; removing the detected at least one shadow region from the re-positioned first binary image to generate a second image; and correcting a skewed orientation of each of a cropped left side and right side of the second image.