Introduction rl Several recent projects associated with ou aboratory have needed
computational methods for s assessing image quality. 1) A display modeling ystem needed …

Halftoning to two or more levels by means of ordered dither has always been attractive
because of its speed and simplicity. However, the so-called recursive tessellation arrays in …

Recent advances in digital imaging technology, computational speed, storage capacity, and
networking have resulted in the proliferation of digital images, both still and video. As the …

A comparative study of different CSFs (contrast sensitivity functions) as to their suitability for
the formulation of quality measures in halftoning is presented. The evaluation of the different …

A model for the human visual system (HVS) is an important component of many halftoning
algorithms. Using the iterative direct binary search (DBS) algorithm, we compare the …

The direct binary search (DBS) algorithm employs a search heuristic to minimize the mean-
squared perceptually filtered error between the halftone and continuous-tone original …

Displaying natural images on an 8-bit computer monitor requires a substantial reduction
ofphysically distinct colors. Simple minimum mean squared error quantization with 8 levels …

We present an enhanced error diffusion halftoning algorithm for which the filter weights and
the quantizer thresholds vary depending on input pixel value. The weights and thresholds …

A least-squares model-based (LSMB) approach to digital halftoning is proposed. It exploits
both a printer model and a model for visual perception. It attempts to produce an optimal …

Error diffusion is a procedure for generating high quality bilevel images from continuous-
tone images so that both the continuous and halftone images appear similar when observed …