Image segmentation is a fundamental and important step in many computer vision applications. One of the most widely used image techniques clustering. It process segmenting intensities non-homogeneous into homogeneous regions based on their similarity property. However, clustering methods require prior initialization random centers often converge to local optimum, thanks choices initial centers,...

Local cosine/sine basis is a localized version of co-sine/sine basis with a smooth window function. It has orthogonality and good time and frequency localization properties. Adaptive local cosine/sine basis is a best-basis based on a cost-functional obtained from an overabundant library of cosine/sine packets. In this paper, we apply the 2-D semi-adaptive (time-adaptive or space-adaptive) local...

Generalised definitions of exponential, trigonometric sine and cosine and hyperbolic sine and cosine functions are given. In the lowest order, these functions correspond to ordinary exponential, trigonometric sine etc. Some of the properties of the generalised functions are discussed. Importance of these functions and their possible applications are also considered. PACS No.: 02.30.Hq, 02.30.Gp...

Generalised definitions of exponential, trigonometric sine and cosine and hyperbolic sine and cosine functions are given. In the lowest order, these functions correspond to ordinary exponential, trigonometric sine etc. Some of the properties of the generalised functions are discussed. Importance of these functions and their possible applications are also considered. PACS No.: 02.30.Hq, 02.30.Gp...

This paper describes a hardware realization of Sine wave generator using CORDIC algorithm. A complex oscillator based on the unfolded CORDIC algorithm has been implemented, which produces periodic sine and cosine samples for any specified angle increment. Where the frequency accuracy is achieved by residual angle correction unit and stability is achieved using AGC unit, also phase jitter is avo...

This paper presents a modified 32-bit ROM-based Direct Digital Frequency Synthesizer (DDFS). Maximum output frequency of the DDFS is limited by the structure of the accumulator used in the DDFS architecture. The hierarchical pipeline accumulator (HPA) presented in this paper has less propagation delay time rather than the conventional structures. Therefore, it results in both higher maximum ope...