In this paper, a novel decision based median (DBM) filter for enhancing MR images has been proposed. The method is based on eliminating impulse noise from MR images. A median-based method to remove impulse noise from digital MR images has been developed. Each pixel is leveled from black to white like gray-level. The method is adjusted in order to decide whether the median operation can be appli...

In this paper, a special preprocessing operations (filter) is proposed to decrease the effects of noise of textures. This filter using average of circular neighbor points (Cmean) to reduce noise effect. Comparing this filter with other average filters such as square mean filter and square median filter indicates that it provides more noise reduction and increases the classification accuracy...

in many computer vision applications, segmenting and extraction of moving objects in video sequences is an essential task. background subtraction, by which each input image is subtracted from the reference image, has often been used for this purpose. in this paper, we offer a novel background-subtraction technique for real-time dynamic background generation using color images that are taken fro...

skin cancer has been the most usual and illustrates 50% of all new cancers detected each year. if they detected at an early stage, treatment can become simple and economically. accurate skin lesion segmentation is important in automated early skin cancer detection and diagnosis systems. the aim of this study is to provide an effective approach to detect the skin lesion border on a purposed imag...

~ct~r r~e:~~~~~n j=a:~~e~a~~~t j~ea~ea~:~=i~ tasks. For t~ee chamel color jmag~, a widely used tecmique is expensive; for a window size of n x n each ~f the n~ vector: h:: ~=;r~~~·o~~ctor1 me1dla n ~It~ a~~ comp!J:alionally purp?se computation on graphics Processing urVts (GPUs) is the paradi m of ufliz" r "hi h voc Drs In Istances. General architectures f?r ~mputalion tasks that are normally h...

periodic noises are unwished and spurious signals that create repetitive pattern on images and decreased the visual quality. firstly, this paper investigates various methods for reducing the effects of the periodic noise in digital images. then an adaptive optimum notch filter is proposed. in the proposed method, the regions of noise frequencies are determined by analyzing the spectral of noisy...

Image noise refers to random variations in the basic characteristics of image like brightness, intensity or color difference. These variations are not present in the image which is captured but may occur due to environmental conditions like sensor temperature or due to circuit of the scanner or other similar issues. Basically noise means unwanted signals in the image. Various filters have been ...