Practical issues in the implementation of sliding mode control systems, such as finite switching frequency, time delays and unmodelled dynamics, determine the state to belong to a neighborhood of the sliding manifold (the boundary layer) instead of lying on it. Dithering is here proposed as a technique for the regulation of the boundary layer when the actuator has a natural on-off behaviour. It...

color halftoning, dithering, barycentric coordinates. Monochrome dither halftoning is a gray-scale image rendering procedure where gray-levels in an image are compared against a periodic threshold array, placing a Black dot in every location whose gray-level is smaller than the corresponding threshold value. Current generalizations to color printing result in Cartesian thresholding procedures, ...

Most color image printing and display devices do not have the capability of reproducing true color images. A common remedy is the use of dithering techniques that take advantage of the lower sensitivity of the eye to spatial resolution and exchange higher color resolution with lower spatial resolution. An adaptive error diffusion method for color images is presented. The error diffusion filter ...

Owing to the limited calculation precision during digital signal processing, the intermediate stages’ signal-bit-width truncation should be executed to realize the conversion from high precision to low one. As method of direct truncation will degenerate the Spurious FreeDynamicRange (SFDR) performance of the output signal, this paper proposed that additional digital dither should be added befor...

Multiprecision (MP) reconfigurable multiplier that incorporates variable precision, parallel processing (PP), razor-based dynamic voltage scaling (DVS), and dedicated MP operands scheduling to provide optimum performance for a variety of operating conditions. All the building blocks of the proposed reconfigurable multiplier can either work as independent smallerprecision multipliers or work in ...

1 Abstract Video rendering, the process of generating device-dependent pixel data from device-independent sampled image data, is key to image quality. System components include scaling, color adjustment, quantization, and color space conversion. This paper emphasizes methods that yield high image quality, are fast, and yet are simple and inexpensive to implement. Particular attention is placed ...

Most colour image printing and display devices do not have the capacity to deal with true-colours. To display the image anyway, they need to apply a quantisation method to reduce the number of colours present into the image. The research of this article is directed towards the study of a special kind of quantisation methods known as dithering techniques. Several quantisation techniques already ...

d long as the data rate is low enough to permit real-time transfer from disk. This paper is concerned with a method esigned to improve the final visual quality of M-JPEG sequences, without affecting the bit rate or quantization o d parameters. It is based on a procedure we refer to as temporal error diffusion. The term error diffusion is used t escribe a halftoning procedure introduced by Floyd...