We consider a continuous version of Gabor multipliers: operators consisting of a short-time Fourier transform, followed by multiplication by a distribution on phase space (called the Gabor symbol), followed by an inverse short-time Fourier transform, allowing different localizing windows for the forward and inverse transforms. For a given pair of forward and inverse windows, which linear operat...

introduction: this paper addresses a method for automatic detection of blood vessels in color fundus images which utilizes two main tools: image partitioning and local radon transform. material and methods: the input images are firstly divided into overlapping windows and then the radon transform is applied to each. the maximum of the radon transform in each window corresponds to the probable a...

this study aimed to investigate the anti-angiogenic activity of vitex agnus castus methanol extract in vivo. eggs were incubated for three days, small whole made on the fine pinpoint, next day the egg’s sac penetrated and a small frame was made in the shell. the window was resealed and eggs were returned to the incubator until day 10 of chick embryo development, 20 µl of 500mg/ml of the methano...

Image fusion is one of the recent trends in image reg istration which is an essential field of image processing. The basic principle o f this paper is to fuse multi-focus images using simple statistical standard deviation. Firstly, the simple standard deviation for the k×k window inside each of the mult i-focus images was computed. The contribution in this paper came from the idea that the focu...

Comparative study on Sea Surface Temperature: SST estimations among the conventional Multi-Channel Seat Surface Temperature: MCSST, split window method and the proposed Conjugate Gradient based method: CGM with Thermal Infrared Radiometer: TIR data through simulations is conducted. Utilizing the proposed linearized inversion of radiative transfer equation, SST can be estimated. SST estimation a...

New method to eliminate block artifact in high compressed images is presented. Here the emphasis is placed on Hermite transform and we also accentuate on pixel near the block boundaries, and, because it is a polynomial transform with a gaussian window that is in a good agreement with human visual processing procedure.

Energy concentration of the S-transform in the time-frequency domain has been addressed in this paper by optimizing the width of the window function used. A new scheme is developed and referred to as a window width optimized S-transform. Two optimization schemes have been proposed, one for a constant window width, the other for time-varying window width. The former is intended for signals with ...

Conventionally, image quality assessment (IQA) algorithms represent image quality as linearity with a “reference” or “perfect” image. Obvious drawback of this method is that the many times original image may not be accessible for the QA algorithm. This paper proposes an image quality assessment of natural-scene statistic-based on DCT score prediction approach. It operates in transform domain. M...

In this paper, a denoising and binarization scheme of document images corrupted by white Gaussian noise and Impulse noise is presented using Curvelet Transform. The ability of sparse representation and edge preservation of Curvelet transform is utilized. Impulse noise gets added during document scanning or after binarization of scanned document images. White Gaussian noise corrupts the document...