Image scaling is the process of resizing a digital image, wherein an image is converted from one resolution/dimension to another resolution/dimension without losing the visual content. It has many terminologies in literature such as Image Interpolation, image re-sampling, digital zooming, image magnification or enhancement, etc [1] [2]. Image interpolation algorithms can be grouped in two categ...

Singularly perturbed 2D parabolic delay differential equations with the discontinuous source term and convection coefficient are taken into consideration in this paper. For time derivative, we use fractional implicit Euler method, followed by fitted finite difference method bilinear interpolation for locally one-dimensional problems. The proposed is shown to be almost first-order convergent spa...

In this paper, the one-dimensional grey polynomial interpolation (1-D GPI) developed for image enlargement in [27] is applied to reduce the block effect in the block discrete cosine transform (BDCT) image/video coders. Note that the block effect in the BDCT coders results from insufficient bits for transform coefficients. An interpolation approach is proposed to relieve the block effect problem...

We propose a simple method for modifying emotional speech sounds. The method aims at real-time implementation of an emotional expression transformation system based on STRAIGHT. We developed a mapping function of spectra, fundamental frequencies (F0), and vowel durations from the statistical analysis of 1500 expressive speech sounds in an emotional speech database. The spectral mapping paramete...

Background: High-resolution medical images often need to be downsampled because of the memory limitations hardware used for machine learning. Although various image interpolation methods are applicable downsampling, effect data preprocessing on learning performance convolutional neural networks (CNNs) has not been fully investigated. Methods: In this study, five different pixel algorithms (near...

Common hybrid video coding standards such as H.263, MPEG-1,2,4 are based on motion compensated prediction. For the motion compensated prediction purpose, displacement vectors with fractional-pel resolutions (e.g. 1/2-pel or 1/4-pel) are used. In order to estimate and compensate fractional-pel displacements, the image signal has to be interpolated. The most popular and very simple interpolation ...

A post-processing technique has been developed to suppress the MRI artifact arising from object planar rigid motion. In 2-DFT MRI, rotational and translational motions of the target during MR scan respectively impose non-uniform sampling and a phase error on the collected MRI signal. The artifact correction method introduced considers the following three conditions: (i) For planar rigid motion ...

A new approach for computationally efficient estimation of stability factors for parametric partial differential equations is presented. The general parametric bilinear form of the problem is approximated by two affinely parametrized bilinear forms at different levels of accuracy (after an empirical interpolation procedure). The successive constraint method is applied on the coarse level to obt...