نتایج جستجو برای: noising filter
تعداد نتایج: 124222 فیلتر نتایج به سال:
Many techniques have been reported earlier in open literature in the area of digital image enhancement. In this paper, a novel approach is presented which improves the accuracy and minimizes the blurring effect with edge preservation. The work involved construction of a new filter using weighted average method, an edge filter and a combiner. The new filter thus constructed has been tested and e...
Diabetic Retinopathy (DR) is one of the leading cause of blindness. Digital image processing has been effectively used for the screening, diagonosis and treatment of DR in oreder to lesser the burden of the opthamologist. The use of good quality retinal images is very essential for accurate detection, diagnosis and damage assessment of retina. Non uniform illumination and poor contrast due to t...
This paper presents a robust de-noising model for image enhancement using adaptive median filtering. In this approach image noise is detected with a standard median filter using an adaptive window. Within the window, the original value of the center pixel is changed to a newer that is closer to or same as the standard median. A comparison has been arranged among the proposed method, the standar...
It is universally accepted that Median filter is the best filter known so far. Based on this fact many variants of median filter were developed to improve the performance of the standard median filter. In this paper a new approach for the restoration of gray scale and color images that are highly corrupted by impulse noise is proposed. The algorithm works on low density noise also. The algorith...
The amplitude of nuclear magnetic resonance (NMR) longing signal general is very small while the signal to noise ratio (SNR) is also very low, so de-noising NMR signal before T2 spectrum inversion is necessary and important. In this paper, an improved de-noising algorithm based on wavelet transform is put forward. The main idea of this improved algorithm is that NMR signal is divided to several...
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