A postprocessing algorithm is proposed to reduce the blocking artifacts of Joint Photographic Experts Group (JPEG) decompressed images. The reconstructed images from JPEG compression produce noticeable image degradation near the block boundaries, in particular for highly compressed images, because each block is transformed and quantized independently. The blocking effects are classified into th...

This thesis presents a new representation called floating polygon soup for applicationslike 3DTV and FTV (Free Viewpoint Television). The polygon soup is designed forcompactness, compression efficiency, and view synthesis quality. The polygons arestored in 2D, with depth values at each corner. They are not necessarily connected toeach other and can be deformed (or floated) w.r.t...

In this work, the stability of hypersonic flow over a curved compression ramp is studied using several analysis tools and direct numerical simulations (DNS). The free-stream Mach number unit Reynolds are 7.7 $4.2 \times 10^6$ m $^{-1}$ , respectively. Corner rounding considered to alter separation bubble so as suppress intrinsic instability compression-ramp flow. variation confirmed by global a...

In modelling the behavior of thick-walled metal shells under compressive loads, use J2 flow theory can lead to unrealistic buckling estimates, while alternative ‘corner’ models, despite offering good predictions, have not been widely adopted for structural computations due their complexity. The present work develops a new and efficient plasticity model predicting response compressed shells. It ...

Abstract This paper investigates the robustness of a 6‐storey corner‐supported Modular Steel Building (MSB) under notional ground floor corner column removal (i.e. alternate path method). The assessment following structural effects that were frequently ignored for sake simplicity in existing numerical modelling approaches: (1) semi‐rigidity beam‐to‐column connections, and (2) initial out‐of‐str...

ABSTRACT Measurement of breast tissue response to external stimulation has the potential to unveil additional dynamic biomarkers of disease states. Recently tumor contrast generated by breathing-gas induced vascular changes has been demonstrated using both BOLD imaging [1] and MRIguided near infrared diffuse optical tomography [2]. At the same time, in the biomedical optics community, temporall...

A point set satisses the Steinhaus property if no matter how it is placed on a plane, it covers exactly one integer lattice point. Whether or not such a set exists, is an open problem. Beck has proved 1] that any bounded set satisfying the Steinhaus property is not Lebesgue measurable. We show that any such set (bounded or not) must have empty interior. As a corollary, we deduce that closed set...

We developed a method to validate and filter a large set of previously obtained corner points. We derived the necessary relationships between image derivatives and estimates of corner angle, orientation and contrast. Commonly used cornerness measures of the autocorrelation matrix estimates of image derivatives are expressed in terms of these estimated corner properties. A candidate corner is va...

In this paper, we will introduce a new corner detector and compare its performance with other three popular corner detectors. The new detector assumes a welldefined corner of a gray level image should have a good corner structure that is similar with the ideal corner structure. Experiments have shown that the new corner detector is accurate and efficient. What’s more, the corner detector estima...