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.

公开(公告)号：US09800879B2

公开(公告)日：2017-10-24

申请号：US14955082

申请日：2015-12-01

Applicant: XEROX CORPORATION

Inventor： Arindam Das ,  Mahesh Ramasamy ,  Punitha Puttuswamy

IPC: G06K9/36 ,  H04N19/36 ,  H04N19/187 ,  H04N19/136 ,  H04N19/467

CPC classification number: H04N19/36 ,  G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0203 ,  G09C5/00 ,  H04L9/14 ,  H04L9/3226 ,  H04N19/136 ,  H04N19/187 ,  H04N19/467

Abstract: Methods and systems for providing multi-layer reversible data hiding are disclosed. According to the methods and systems, multi-layer reversible data hiding process may be implemented in two stages. The first stage provides embedding of the sensitive data on a secret layer and hiding the secret layer behind single or multiple layers for secure transmission for intended recipient. Subsequently, the second stage is concerned about retrieving or extracting the hidden sensitive data through proper authentication. In the extraction process, the recipient needs to provide the right authentication code for each of embedded layer in order to reach to the secret layer. Upon unsuccessful authentication of any embedded layer, the proposed method enables an intelligent security technique termed as SMART (Suspect Malicious Activity on Rich Tract), which ensures to protect the sensitive data by suspecting the attempts of theft and intrusion.

公开(公告)号：US20170155916A1

公开(公告)日：2017-06-01

申请号：US14955082

申请日：2015-12-01

Applicant: XEROX CORPORATION

Inventor： Arindam Das ,  Mahesh Ramasamy ,  Punitha Puttuswamy

IPC: H04N19/36 ,  H04N19/136 ,  H04N19/467 ,  H04N19/187

CPC classification number: H04N19/36 ,  G06T1/0028 ,  G06T2201/0051 ,  G06T2201/0203 ,  G09C5/00 ,  H04L9/14 ,  H04L9/3226 ,  H04N19/136 ,  H04N19/187 ,  H04N19/467

Abstract: Methods and systems for providing multi-layer reversible data hiding are disclosed. According to the methods and systems, multi-layer reversible data hiding process may be implemented in two stages. The first stage provides embedding of the sensitive data on a secret layer and hiding the secret layer behind single or multiple layers for secure transmission for intended recipient. Subsequently, the second stage is concerned about retrieving or extracting the hidden sensitive data through proper authentication. In the extraction process, the recipient needs to provide the right authentication code for each of embedded layer in order to reach to the secret layer. Upon unsuccessful authentication of any embedded layer, the proposed method enables an intelligent security technique termed as SMART (Suspect Malicious Activity on Rich Tract), which ensures to protect the sensitive data by suspecting the attempts of theft and intrusion.

公开(公告)号：US09396422B1

公开(公告)日：2016-07-19

申请号：US14945464

申请日：2015-11-19

Applicant: XEROX CORPORATION

Inventor： Vijeetkumar Benni ,  Punitha Puttuswamy

IPC: G06K7/10 ,  G06K19/06

CPC classification number: G06K7/146 ,  G06K7/1443

Abstract: Some embodiments are directed to a system, an apparatus, and a method for automatically detecting and localizing Aztec barcodes in noisy and low-resolution images. The disclosed method detects Aztec barcodes having a resolution of less than two pixels. The disclosed method can process a gray image that is subjected to a coarse localization process in which the barcode region is segmented from the image consisting of other contents like text, graphics, etc. The localized and segmented barcode is then processed separately to locate the encoded data in the Aztec barcode by considering unique Aztec patterns in the barcode.

Abstract translation: 一些实施例涉及用于在噪声和低分辨率图像中自动检测和定位阿兹台克条形码的系统，装置和方法。 所公开的方法检测具有小于两个像素的分辨率的阿兹特克条形码。 所公开的方法可以处理经过粗略定位处理的灰度图像，其中条形码区域由包括诸如文本，图形等的其他内容的图像分割。然后分别对局部和分段的条形码进行处理，以定位编码的 通过考虑在条形码中的独特的阿兹台克图案，在Aztec条形码中的数据。