In this work, we investigate the benefits of incorporating saliency maps obtained with visual attention computational models into three image quality metrics. In particular, we compare the performance of simple quality metrics with quality metrics that incorporate saliency maps obtained using three popular visual attention computational models. Results show that performance of simple quality me...

A well-known issue of local (adaptive) histogram equalization (LHE) is over-enhancement (i.e., generation of spurious details) in homogenous areas of the image. In this paper, we show that the LHE problem has many solutions due to the ambiguity in ranking pixels with the same intensity. The LHE solution space can be searched for the images having the maximum PSNR or structural similarity (SSIM)...

No-reference image quality assessment needs no prior knowledge of reference image. A new fuzzy image quality measure (built from interval type-2 fuzzy sets (IFS2)) is compared with experimental psycho-visual data. The proposed measure is based on IFS2 entropy applied on synthetic images. A recently performed psycho-visual experiment provides psycho-visual scores on some synthetic images, and co...

MPEG-4 is a method of defining compression of audio and video digital data. MPEG-4 videos double compression method is used to decompress video from spatial domain to the frequency domain and then resaved with a different quantization matrix. Markov feature is a second order statistics which was adopted to detect double compression artifacts in the original video. In proposed system, double com...

In this paper we discuss the speckle reduction in images with the recently proposed Wavelet Embedded Anisotropic Diffusion (WEAD) and Wavelet Embedded Complex Diffusion (WECD). Both these methods are improvements over anisotropic and complex diffusion by adding wavelet based bayes shrink in its second stage. Both WEAD and WECD produces excellent results when compared with the existing speckle r...

Carbon dioxide (CO2) and methane (CH4) are two climate-sensitive components of gases migrating within sediments emitted into the water column on continental margins. They involved in several key biogeochemical processes entering global carbon cycle. In order to perform onboard measurements both molecular stable isotope ratios (δ13C) CH4 CO2 natural during oceanic cruises, we have developed a no...

Purpose: This study extends the Fast ROtary Nonlinear Spatial ACquisition (FRONSAC) method to include 3D acquisitions and reconstructions. It also presents a transform domain reconstruction that makes reconstructions practical provides new insights into how parallel imaging performance is enhanced by FRONSAC encoding. Methods: work developed first examples of incorporated acquisition. was teste...

ultrasound images suffer of multiplicative noise named speckle. different de-speckling algorithms run either in spatial domain or in transformed domain. in this paper, an adaptive filter in spatial domain according to assume the nakagami distribution as the statistic of log-compressed ultrasound images is used. for de-speckling in transformed domain, the non-sub sampled shearlet transform is us...

Image fusion is important technique used in Remote Sensing application. It plays a very important role in Satellite based communication. Here, introduces a new technique fusion followed by filtering for remove impulse noise in remote sensing images. The Non-Linear filtering algorithms, Vector Median Filter (VMF), Rank Conditioned VMF, Rank Conditioned and Threshold VMF, Center Weighted VMF and ...

Motion estimation and compensation techniques are widely used for video coding applications but the real-time motion estimation is not easily achieved due to its enormous computations. Therefore, it would be greatly beneficial to optimize as much as possible the motion estimation bloc which is considered to be the most important in terms of computational cost. In this paper, a new fast block si...