Visual cryptography is a system offering arrangement which uses pictures flowed as shares such that, when the shares are stack, a touchy or emit picture is uncovered. As per expanded visual cryptography, the offer pictures are manufactured to hold convincing spread pictures, in like manner giving open avenues to organizing visual cryptography and biometric security routines. In this paper, we p...

Light scattering, or the so-called Yule-Nielsen effect, and ink penetration into the substrate paper play important roles in tone reproduction. We develop a framework in which the influences of both of these effects on the reflectance and tristimulus values of a halftone sample are investigated. The properties of the paper and the ink and their bilateral interaction can be parameterized by the ...

In this paper, we take a spectral model based approach to the problem of color prediction of halftones. Our approach assumes no scattering through the colorant layers and models the surface and subsurface scattering in the paper substrate by a parametric closed form point spread function. Given a halftone bitmap, we synthesize a high-resolution halftone microstructure image assuming dot profile...

Neugebauer modeling plays an important role in obtaining end-to-end device characterization profiles for halftone color printer calibration. This paper proposes total least square (TLS) regression methods to estimate the parameters of various Neugebauer models. Compared to the traditional least squares (LS) based methods, the TLS approach is physically more appropriate for the printer modeling ...

over-modulation scheme Qing Yu and Kevin J. Parker Department of Electrical Engineering University of Rochester, Rochester, NY 14627 Kevin Spaulding and Rodney Miller Imaging Science Division Eastman Kodak Company, Rochester, NY 14650-1816 ABSTRACT Multilevel halftoning (multitoning) is an extension of bitonal halftoning, in which the appearance of intermediate tones is created by the spatial m...

Visual cryptography is a special encryption or cryptography technique used for securing the visual information like text, pictures etc to be performed in such a way that their decryption can be performed by human visual system. The basic idea of visual cryptography is based on the process in which the original image is firstly converted into halftone image which is a binary image and then it is...

In this work, a method which can generate high quality inverse halftone images from halftone images is proposed. This method uses least-mean-square (LMS) trained filters to establish the relationship between the current processing position and its corresponding neighbor positions in each kind of halftone image. This includes direction binary search (DBS), error diffusion, dot diffusion, and ord...