introduction spect projections are contaminated by scatter radiation, resulting in reduced image contrast and quantitative errors. backscatter constitutes a major part of the scatter contamination in lower energy windows. the current study is an evaluation of the effect of backscatter material on fwhm and image quality investigated by monte carlo simulation. materials and methods simind program...

Model abstraction techniques have been widely used to accelerate simulations in the context of homogeneous wired networks, whereas their applications to more complex network systems, such as wireless networks, are rare. This paper investigates how model abstraction techniques are applied to simulations of mobile ad hoc networks (MANETs). We introduced a multi-resolution simulation framework bas...

The paper proposed a secure technique for color images using DCTDWT technique and AES-128 bit Key encryption algorithm for improving security of system. Host image converted to YIQ after embedding using DWT. The quality of watermark measured by metrics such as; structural similarity (SSIM) and quaternion structural similarity (QSSIM).This improves traditional methods. Experimental results prove...

We present a corpus of experimental data from psychometric studies on gamut mapping and demonstrate its use to develop image similarity measures. We investigate whether similarity measures based on luminance (SSIM) can be improved when features based on chroma and hue are added. Image similarity measures can be applied to automatically select a good image from a sample of transformed images.

A modified edge detection algorithm has been presented here that uses logarithmic transform and Hyperbolic Tangent (HBT) filter. The proposed algorithm incorporates Logarithmic transform along with Luminance and Contrast-Invariant Edge Similarity Measure algorithm for edge detection. The proposed algorithm gives a good quality edge detection of images with improved SSIM value and almost equal o...

Thermal infrared (TIR) imagery is normally acquired at coarser pixel resolution than that of shortwave sensors on the same satellite platform. TIR resolution is often not suitable for monitoring crop conditions of fragmented farming lands, e.g., the accurate estimates of evapotranspiration (ET) based on surface energy balance from remote sensing for irrigation water management. Consequently, th...

This work comprises the development of a quality enhancement technique for image encoders that use compressive sensing. The recommended solution seeks to maximize perceptual based objective function, unlike other sparse representation algorithms minimizes error-based function. key idea behind this is develop an iterative methodology works as modifier coefficients. modification procedure SSIM-ba...

BACKGROUND Compressive sensing can provide a promising framework for accelerating fMRI image acquisition by allowing reconstructions from a limited number of frequency-domain samples. Unfortunately, the majority of compressive sensing studies are based on stochastic sampling geometries that cannot guarantee fast acquisitions that are needed for fMRI. The purpose of this study is to provide a co...

Complex wavelet structural similarity (CW-SSIM) index has been proposed as a powerful image similarity metric that is robust to translation, scaling and rotation of images, but how to employ it in image classification applications has not been deeply investigated. In this paper, we incorporate CW-SSIM as a kernel function into a random forest learning algorithm. This leads to a novel image clas...

This paper proposes a joint rate control scheme for multiple video sequences coding based on H.264/AVC standard that produces uniform picture quality. Structural Similarly Information (SSIM), is assessed as a coding complexity of a video program measure regarding its perceptual quality. Initial results are presented and discussed.