Electrophotographic process embedded in direct binary search

Kacker, D.; Camis, Tom; Allebach, Jan P.

doi:10.1109/83.988958

Cited by 42 publications

(24 citation statements)

References 17 publications

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“…Finally, we use the direct binary search (DBS) algorithm to find a locally optimum precompensated binary image. DBS has proven to be an effective tool in a variety of halftoning applications [3,6,7,[11][12][13][14][15][16]. To our knowledge, this is its first application to the optimization of printed text images.…”

Section: Introductionmentioning

confidence: 99%

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Binary text image file preprocessing to account for printer dot gain

Zhang

Veis

Ulichney

et al. 2014

2014 IEEE International Conference on Image Processing (ICIP)

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Dot gain is a classic problem in digital printing that causes printed halftones and text to appear darker than desired. For printing of text, we propose a method to preprocess the image sent to the printer in order to compensate for dot gain. It is based on an accurate model that predicts the printed absorptance for given local neighborhood in the digital image, a cost function to penalize lack of fidelity to the desired target text image, and the use of direct binary search (DBS) to minimize the cost.

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Section: Introductionmentioning

confidence: 99%

“…With electrophotography, the deposition of toner within the area of a given printer-addressable pixel is strongly influenced by not just the image value at that pixel, but also by the image values of the immediately neighboring pixels [3,4].…”

Section: Introductionmentioning

confidence: 99%

Binary text image file preprocessing to account for printer dot gain

Zhang

Veis

Ulichney

et al. 2014

2014 IEEE International Conference on Image Processing (ICIP)

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“…It manifests as contrast variations on a printed page and is especially visible in the mid-tone area. Many approaches have been shown to be effective in reducing banding by modulating EP process parameters such as laser intensity or timing [1][2] and motor speed [3] to compensate for process disturbances such as gear noise. These methods can also be used to inject properly designed banding signatures.…”

Section: Introductionmentioning

confidence: 99%

Determine perceptual laser modulation threshold for embedding sinusoidal signature in electrophotographic half-toned images

Chiang¹,

Delp

Allebach

et al. 2007

2007 IEEE/ASME International Conference on Advanced Intelligent Mechatronics

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Abstract-Printer identification based on a printed document can provide forensic information to protect copyright and verify authenticity. In addition to intrinsic features (intrinsic signatures) of the printer, modulating the printing process to embed specific signatures (extrinsic signatures) will further extend the encoding capacity and utility. One of the key issues with embedding extrinsic signature is the embedded signature should not be detectable by the human observer but is detectable using a matched sensing device and detection algorithm. In this paper, we will investigate the modeling and experimental characterization of the EP process to obtain the modulation threshold such that the embedding signatures are below human visual threshold. An empirical model is established and a heuristic functional inverse is used to obtain the process modulation threshold.Index Terms-Extrinsic signature, laser intensity modulation, human visual system, modulation threshold.

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“…The intensity profile of the laser beam is modeled as a 2-D Gaussian envelope, 22,23 which is given by…”

Section: Relationship Between Laser Power and Exposurementioning

confidence: 99%

Information embedding and extraction for electrophotographic printing processes

et al. 2006

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In today's digital world securing different forms of content is very important in terms of protecting copyright and verifying authenticity. One example is watermarking of digital audio and images. We believe that a marking scheme analogous to digital watermarking but for documents is very important. In this paper we describe the use of laser amplitude modulation in electrophotographic printers to embed information in a text document. In particular we describe an embedding and detection process which allows the embedding of 1 bit in a single line of text. For a typical 12 point document, 33 bits can be embedded per page.

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Electrophotographic process embedded in direct binary search

Cited by 42 publications

References 17 publications

Binary text image file preprocessing to account for printer dot gain

Binary text image file preprocessing to account for printer dot gain

Determine perceptual laser modulation threshold for embedding sinusoidal signature in electrophotographic half-toned images

Information embedding and extraction for electrophotographic printing processes

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