نتایج جستجو برای: salt and pepper noise
تعداد نتایج: 16868475 فیلتر نتایج به سال:
Using UVIS and IR data from the 2004 thermal vacuum tests, we have searched for anomalous behavior in the WFC3’s analog-to-digital converters (ADCs). We find that the ADCs of the CCD channel operate nominally, except for the less significant bits which favor 1’s over 0’s by up to 5%, depending on the ADC and on the input voltage. The IR channel, clocked at double speed, also shows departures in...
This paper presents a novel watermarking scheme based on Discrete Wavelet Transforms and Singular Value Decomposition. The singular values of HL band is going to embedded with watermark singular values making use of scaling factor (?). The effectiveness of the proposed algorithm is measured using peak signal to noise ratio (PSNR), structural similarity index(SSIM) and normalized correlation (NC...
Denoising an image is the important task in an image processing. Images are noised during the capture and transmission. Image enhancement is the main and primary step in image processing concept. It is used to develop the quality and brightness of an image. Generally fundus images are picked up from various locations, using different cameras. This results in a range of images with diverse quali...
Medical Images are often degraded by electronic equipments, power fluctuations and surrounding environment conditions. Medical images are widespread use in the detection of numerous diseases but noise and blurs present in medical images create obstacles in diagnose diseases. In this paper, Blind Image Deconvolution (BID) procedure is implemented to restore mammographic images from Gaussian blur...
This paper presents an experimental comparisons of different forms of SSD and normalised cross correlation of image neighborhoods. Signal detection theory is used as a framework for analysis of correlation techniques. A sum of squared difference (SSD) of two image neighborhoods is shown to provide an optimal matching measure for tracking and registration. Correlation of the image, its gradient ...
The holistic approaches used for image processing are considered in various types of applications in the domain of applied computer science and pattern recognition. A new image filtering method based on the dynamic particles (DP) approach is presented. It employs physics principles for the 3D signal smoothing. The obtained results were compared with commonly used denoising techniques including ...
-An adaptive smoothing algorithm has been described which is capable of performing various tasks, such as removing salt and pepper noise, preserving roof edges, stretching (enhancing) step edges and reducing variations in low intensity varied regions. While iteration advances, it approximates both isotropic and anisotropic heat diffusion processes in performing these tasks. A region topography ...
we know that when we transmit data from transmitter to receiver definitely various types of noises added automatically to our main data and it’s very tough task at receiver side to get exact data whatever be transmitted from transmitter side. In this review paper our focus is to remove salt and pepper noise from contaminated image. Therefore we studied various research paper and finally we came...
In modern age, visual information transmitted in the form of digital images is becoming a major method of communication, but the image obtained after transmission is often corrupted with noise. For obtaining the high quality image from original noisy image data manipulation is required. In this paper noise is remove by wavelet based approach & it is proved that wavelet based approach is best wh...
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