Magnetic Resonance Image is one of the best technologies currently being used for diagnosing brain cancer at advanced stages. This paper proposes a novel approach for the MRI image enhancement, which is based on the Modified Tracking Algorithm, Histogram Equalization and Center Weighted Median (CWM) filter. This method consists of two approaches. The first approach is applying the modified trac...

In this paper, we propose a regularization technique for noisy-image super-resolution and image denoising. Total variation (TV) is adopted in many processing applications to preserve the local smoothness. However, TV prior prone oversmoothness, staircasing effect, contrast losses. Nonlocal (NLTV) mitigates losses by adaptively weighting smoothness based on similarity measure of patches. Althoug...

Abstract In the state of art, grayscale image enhancement algorithms are typically adopted for RGB color images captured with low or non-uniform illumination. As these methods applied to each channel independently, imbalanced inter-channel enhancements (color distortion) can often be observed in resulting images. On other hand, illumination enhanced by retinex algorithm prone artifacts such as ...

Color histograms are the most commonly used features for image retrieval due to the good attributes of image translation and rotation invariance. However the traditional color histogram features are usually short of spatial structural information which may cause error retrieval results. This paper presents a color image retrieval method based on Weighted DCT Spatial Combination Histogram (WDSCH...

In this paper, a multi-focus image fusion method based on the weighted non-negative matrix factorization and focal point analysis is presented to improve image fusion method based on non-negative matrix factorization. The relationship among the point spread function, the optical system and imaging processing is analyzed in the method, then a weighted matrix U is built by calculating the differe...

Image processing is methodology to convert an image into digital form. The digital form of data is less complex and easy to interpolate and give an enhanced image or to extract some useful information from it. By this Images are often corrupted by impulse noise during acquisition and transmission. These noises affect the information which is present in the images. There are several algorithms t...

Computed tomography (CT)/magnetic resonance imaging (MRI) fusion is considered to be the best method for postimplant dosimetry of permanent prostate brachytherapy; however, it is inconvenient and costly. In T2*-weighted image (T2*-WI), seeds can be easily detected without the use of an intravenous contrast material. We present a novel method for postimplant dosimetry using T2*-WI/T2-weighted im...

PURPOSE To assess whether contrast-enhanced T1-weighted MR Cholangiography may provide additional information in the evaluation of biliary complications in orthotopic liver transplant recipients. MATERIAL AND METHODS Eighty liver transplant patients with suspicion of biliary adverse events underwent MR imaging at 1.5 T scanner. After acquisition of axial T1-/T2-weighted images and conventiona...

PURPOSE To determine the clinical utility of dual-energy computed tomography (CT) in evaluating solitary pulmonary nodules (SPNs). MATERIALS AND METHODS This study was approved by the institutional review board, and informed consent was obtained. CT scans were obtained before and 3 minutes after contrast material injection in 49 patients (26 men, 23 women; mean age, 60.39 years +/- 12.24 [sta...