The authors propose an improved decision-based detail-preserving variational method (DPVM) for removal of random-valued impulse noise. In the denoising scheme, adaptive centre weighted median filter (ACWMF) is first ameliorated by employing the variable window technique to improve its detection ability in highly corrupted images. Based on the improved ACWMF, a fast iteration strategy is used to...

(a) In this question you are asked to show that randomness extraction is possible only from sources that are statistically close to sources with high min-entropy; thus, high minentropy is both sufficient and necessary for randomness extraction. More formally, let X be any distribution over {0, 1}n and let Ext : {0, 1}n × {0, 1}d → {0, 1}m. Suppose that Ext(X,Ud) is ǫ-close to the uniform distri...

This work continues the search for viable intractability assumptions over infinite groups. In particular, we study the possibility of phrasing random self-reducibility properties for infinite groups in an analogous manner to the case of finite groups with the uniform distribution. As a first step, it is natural to look for distributions which are translation-invariant, i.e., the probability of ...

We study the design of a belief propagation decoder for lowdensity parity check (LDPC) codes over binary channels with additive M th-order Markov noise, specifically the queuebased channel (QBC) [1]. The decoder is an extension of the sum product algorithm (SPA) for the case of memoryless channels and is similar to the one developed for the GilbertElliot channel [2, 3, 4]. Simulation results of...

Barak and Halevi (BH) have proposed an efficient architecture for robust pseudorandom generators that ensure resilience in the presence of attackers with partial knowledge or partial controls of the generators’ entropy resources. The BH scheme is constructed from the Barak, Shaltiel and Tromer’s randomness extractor and its security is formalized in the simulation-based framework. The BH model ...

in traditional bazaars social interactions, parallel to economic and movement interactions, created a mixed urban space which was dynamic, lively and attractive to the audience. however, modern shopping centers and shopping malls are economy focused and void of variety of urban spaces like traditional bazaars. the presence of public open spaces and urban squares undetectable from traditional ba...

The object of this paper to derive certain sucient condi-tions for close-to-convexity of certain analytic functions dened on theunit disk