This paper presents a novel FPGA implementation of a barrel distortion correction algorithm with a focus on reducing hardware complexity. In order to perform real-time correction in hardware the undistorted output pixels must be produced in raster order. To do this the implementation uses the current scan position in the undistorted image to calculate which pixel in the distorted image to displ...

In this paper we address the problem of producing an enlarged picture from a given digital image (zooming). We propose a method that tries to take into account information about discontinuities or sharp luminance variations while doubling the input picture. This is realized by a multiple scan of the zoomed image and could hence be implemented with limited computational resources. The algorithm ...

We propose an adaptive video scaling system based on bilinear interpolation implemented FPGA. Different from the previous for converting a specific input resolution to specified output resolution, we have realized multiple stream inputs. At same time, system's resource occupancy rate is small, which facilitates integration with other modules. Experimental results show that can achieve real—time...

bstract. In this paper, a multiple description image coding cheme is proposed to facilitate the transmission of images over edia with possible packet loss. The proposed method is based on nding the optimal reconstruction filter coefficients that will be used o reconstruct lost descriptions. For this purpose initially, the original mage is downsampled and each subimage is coded using standard PE...

A modified immersed-boundary method is developed using the direct-forcing concept. An improved bilinear interpolation/extrapolation algorithm is implemented for more accurate boundary forcing expressions and easier implementation. Detailed discussions of the method are presented on the stability, velocity interpolation on the immersed boundary, directforcing extrapolation to the grid points, re...

The superconvergent patch recovery (SPR) with bilinear interpolation functions usually gives good values of recovered stresses in an element patch. However, when 4-node quadrilateral elements meeting at a node are rigidly rotated with the essential and natural boundary conditions unchanged, the recovered stresses obtained by the SPR change and depend upon the local rotation of the patch. This c...

(t, n) threshold secret sharing is a cryptographic mechanism to divide and disseminate information among n participants in a way that at least t(t ≤ n) of them should be present for the original data to be retrieved. This has practical applications in the protection of secure information against loss, destruction and theft. In this study, the authors propose a new multi-secret sharing scheme wh...