This paper introduces an improved block matching algorithm for the estimation of the parallax field between the left and the right image of a stereo pair. When the block size is small, e.g. for computer vision purposes, traditional block matching alone fails. Most of the small blocks do not expose enough structure to be reliably matched. Therefore, in this paper a parallax field estimated with ...

BACKGROUND AND OBJECTIVES In 2003 we introduced the concept of a sciatic nerve block performed in the midgluteal area at a fixed distance from the midline in all adults regardless of gender and/or body size. The anatomic basis for that study suggested that a subgluteal block could also be accomplished in a similar fashion. METHODS After informed consent, 20 patients were prospectively recruit...

In this article we investigate the asymptotic and numerical properties of a class of block thresholding estimators for wavelet regression. We consider the effect of block size on global and local adaptivity and the ch oice of thresholding constant. The optimal rate of convergence for block thresholding with a given block size is derived for both the global and local estimation. It is shown that...

Recently an algorithmic schema was proposed for converting any existing block cipher into one which excepts variable length inputs with the computational workload increasing in proportion to the block size. The resulting cipher is referred to as an elastic block cipher. The initial work presented immunity to certain key recovery attacks, and left open further analysis of the method and its poss...

In this note we define small scale variants of the block cipher present [1]. The main reason for this is that the running time of some recent attacks (e.g. [2, 3]) remain unclear as they are based on heuristics that are hard or even impossible to verify in practice. Those attacks usually require the full code bock of present to be available and they work only if some independence assumptions ho...