An empirical model has been developed to describe tone reproduction in halftone imaging. The model is based on experimental measurements of the image microstructure of halftone gray scales produced by offset lithography, thermal transfer, ink jet, and silver halide photography. Both traditional and stochastic halftone patterns are described by the model. Like the YuleNielsen model, which contai...

Data hiding and reversible data research has primarily focused on grayscale color images, because binary halftone images are prone to visual distortion caused by a small number of errors in pixel representation. As result, is more useful than halftone-based hiding. This study proposes an investigation encrypted based dual hiding, which improves the reversibility security image utilizing cover i...

In this correspondence, a novel wavelet-based approach to recover continuous-tone (contone) images from halftone images is presented. Wavelet decomposition of the halftone image facilitates a series of spatial and frequency selective processing to preserve most of the original image contents while eliminating the halftone noise. Furthermore, optional nonlinear filtering can be applied as a post...

A novel digital halftoning technique, by which the halftoning is achieved by a pixelwise comparison of the grayscale image to an array (halftone screen), the blue-noise mask, is presented. This mask is designed so that the halftone image has blue-noise (high-frequency) characteristics in the frequency domain. The algorithm for the construction of the blue-noise mask and an algorithm for the con...

A new method for coding scanned halftone images is proposed. It is information-lossy, but still preserving the image quality, compression rates of 16-35 have been achieved for a typical test image scanned on a high resolution scanner. The bi-level halftone images are filtered, in phase with the halftone grid, and converted to a gray level representation. A new digital description of (halftone) ...

watermarking, digital security, halftone printing, printing security, error diffusion This report analyzes watermark embedding in Error Diffusion halftone images. A distortion measure for halftone modifications is introduced, and an embedding scheme is selected so as to minimize the proposed distortion. Next a statistical model is suggested for “natural-images”, leading to a lower bound on the ...

Halftone printing has been developing in a linear manner since the inception of photography. The process of refinement has taken it from one level to another producing increasingly fine results principally by using higher resolution screens. Yet in spite of this focus and success, or perhaps because of it, the concept that has produced all this technology is rarely traced back to its roots, whi...

We propose a metric to predict the visibility of color halftone textures. This metric is represented by the critical viewing distance below which the halftone textures can be discriminated. It is intended to be used in the evaluation of the texture visibility of uniform color halftone patterns, which plays an important role in halftone design and optimization. The metric utilizes the visual thr...

In this paper, we consider to formulate an image data hiding scheme based on error diffusion. By using the scheme, visual patterns are embedded in a halftone image without affecting its perceptual quality depending on a halftone key image. The scheme has the feature of visual cryptography with respect to extracting of the embedded patterns, i.e., when we print the two halftone images onto trans...

Scanning a halftone image introduces halftone artifacts, known as Moire patterns, which significantly degrade the image quality. Printers that use amplitude modulation (AM) screening for halftone printing position dots in a periodic pattern. Therefore, frequencies relating half toning arc easily identifiable in the frequency domain. This paper proposes a method for de screening scanned color ha...