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公开(公告)号：US11509791B1
公开(公告)日：2022-11-22
申请号：US17391190
申请日：2021-08-02
Applicant: XEROX CORPORATION
Abstract: The present disclosure discloses methods and systems for automatically detecting Infrared (IR) security mark based on unknown halftone frequency information. The method includes receiving a document from a user including an IR security mark. The document is scanned. Then, one or more halftone frequencies associated with the IR security mark portion are estimated. Based on the estimation, the IR security mark portion is classified into a background region and the IR marked region including the IR security mark. The IR security mark is extracted and pixels falling in the IR marked region are reconstructed to identify content in the IR security mark. Finally, the identified content is compared with one or more pre-stored IR security marks to ascertain the presence of the IR security mark in the document for further assessment. This way, the method automatically detects the IR security mark in the document.
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公开(公告)号：US20230030524A1
公开(公告)日：2023-02-02
申请号：US17391253
申请日：2021-08-02
Applicant: XEROX CORPORATION
Abstract: The present disclosure discloses methods and systems for detecting an IR security mark in a document based on known color information and halftone frequency information. The method includes receiving a document from a user, including an IR security mark. Then, location information, color information and halftone frequency information are received from the user. The document is scanned. Based on the color information and the location information, the IR security mark is extracted from the scanned document. After this, halftone frequency information of the extracted IR security mark is verified. Based on the verification, text in the extracted IR security mark is identified and is then compared with one or more pre-stored IR security marks to ascertain whether the IR security mark in the document is an authentic security mark.
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Patent Agency Ranking
公开(公告)号：US11652941B1
公开(公告)日：2023-05-16
申请号：US17717395
申请日：2022-04-11
Applicant: XEROX CORPORATION
Inventor： Sainarayanan Gopalakrishnan , Rajasekar Kanagasabai , Haripriya Chandran , Anand Arokia Raj Antony Muthu Rayar
CPC classification number: H04N1/00864 , H04N1/32192 , H04N1/32229
Abstract: The disclosure discloses methods and systems for securing confidential content of a document. The method includes receiving a print request to print the document. A user interface is provided to the user having a secure option, the secure option further includes a partial secure option to secure partial content of the document. Based on the selection of the partial secure option, a selection of a confidential area including the confidential content in the document is received. Based on the selection, one or more coordinates of the confidential area are calculated. Then, an infrared (IR) mark is embedded in the document. While embedding the IR mark, the one or more coordinates of the confidential area including the confidential content in the document is embedded. Finally, a printed document is output with the IR mark including the coordinates of the confidential area for later identification of the confidential content and/or use such as masking.
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公开(公告)号：US11954931B1
公开(公告)日：2024-04-09
申请号：US17937794
申请日：2022-10-04
Applicant: XEROX CORPORATION
IPC: G06K9/00 , G06V10/28 , G06V20/00 , G06V30/413 , G06V30/414 , G06V30/418
CPC classification number: G06V30/413 , G06V10/28 , G06V20/95 , G06V30/414 , G06V30/418 , G06V2201/13
Abstract: The present disclosure discloses methods and systems for detecting tampering of an infrared (IR) security mark in a document. The method includes receiving the document including the IR security mark, wherein the IR security mark further includes one or more security texts and/or images. The document is scanned to generate scanned data. A portion of the scanned data including the IR security mark is segmented into a plurality of blocks such as blocks of size 32*32. Thereafter, a ratio of white to black pixels is calculated for each block. The calculated ratio is compared with a known threshold for each block. Upon comparison, the IR security mark is detected as a tampered security mark.
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公开(公告)号：US11941937B2
公开(公告)日：2024-03-26
申请号：US17391253
申请日：2021-08-02
Applicant: XEROX CORPORATION
CPC classification number: G07D7/121 , H04N1/00331 , H04N1/32256 , G06T2207/10024 , G07D7/00 , G07D7/202 , H04N1/00838 , H04N1/00856 , H04N1/0087 , H04N2201/327
Abstract: The present disclosure discloses methods and systems for detecting an IR security mark in a document based on known color information and halftone frequency information. The method includes receiving a document from a user, including an IR security mark. Then, location information, color information and halftone frequency information are received from the user. The document is scanned. Based on the color information and the location information, the IR security mark is extracted from the scanned document. After this, halftone frequency information of the extracted IR security mark is verified. Based on the verification, text in the extracted IR security mark is identified and is then compared with one or more pre-stored IR security marks to ascertain whether the IR security mark in the document is an authentic security mark.
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公开(公告)号：US20240020997A1
公开(公告)日：2024-01-18
申请号：US17866864
申请日：2022-07-18
Applicant: XEROX CORPORATION
CPC classification number: G06V30/18105 , G06V30/12 , G06T7/11 , G06T2207/10008
Abstract: The present disclosure discloses methods and systems for adjusting text colors in scanned documents. The method includes receiving a document for scanning from a user. Then, the document is scanned to generate scanned data. The scanned data is segmented into an image layer and one or more text layers, wherein the one or more text layers include textual content. Thereafter, the text color of the textual content in each text layer is identified. Then, the identified text color of the textual content in the text layer is compared with one or more pre-defined colors. Based on comparison, the text color of the textual content in each text layer is adjusted to match with the one or more pre-defined colors thereby generates a modified text layer. Finally, the modified text layer and the image layer are combined to create a final scanned document.
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公开(公告)号：US11765300B1
公开(公告)日：2023-09-19
申请号：US17880752
申请日：2022-08-04
Applicant: XEROX CORPORATION
Inventor： Packiya Lakshmi Balusamy , Ravindranath Mannuru , Haripriya Chandran
CPC classification number: H04N1/32229 , H04N1/00413
Abstract: The present disclosure discloses methods and systems for identifying blank spaces in a document for embedding an Infrared (IR) mark in the document. The method includes receiving the document for printing from the user. A user interface is provided to the user that allows the user to select a pre-defined option. Upon selection of the pre-defined option, inputs from the user on the IR mark is received. Based on the inputs from the user, a specified portion of the document is extracted for processing. Then, blank spaces are checked in the extracted portion based on a size of the IR mark to be embedded in the document. Based on the check, the IR mark is embedded in the identified blank space. An output document is outputted/printed including the IR mark in the specified portion of the document. The IR mark is embedded such that there is no content loss.
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