Signal & Image Processing An International JournalAjay Kumar Boyat and Brijendra Kumar Joshi,"A Review Paper: Noise Models in Digital Image Processing" Signal & Image Processing : An International Journal (SIPIJ
Digital holography (DH) has emerged as one of the most effective coherent imaging technologies. The technological developments of digital sensors and optical elements have made DH the primary approach in several research fields, from quantitative phase i
Technically, almost every image file containssomelevel of noise, even if it’s invisible to the naked eye. If you open an apparently noise-free photo and zoom in to 400%, for instance, you’ll probably start to see aberrations in the pixels, even if they’re slight. However, in this ...
Based on digital image processing, these methods could automatically extract the test areas from PSi microarray images22. Due to the rough surface of PSi, interference among the scattered light rays under laser light illumination results in the formation of speckle noise on the photosensitive surface...
Digital image has a significant importance in many fields in human life such as, in medicine, photography, biology, astronomy, industry and defense. Thus, it attracts the attention of large number of researchers, among them those interested in preserving the image features from any factors that ...
Noise in Analog and Digital Systems 2.2 Analog (Small-Signal) Noise Noise in analog systems is typically characterized by its impact as a small-signal perturbation. In this form, noise is considered to be an independent alternating current (ac) source (either voltage or current). Table 2.1 lis...
In digital images, x stands for the gray-level, so it is non-negative and often defined as integer x∈[0,255]. Figure 7(a) shows a raw brain image extracted from Open Access Series of Imaging Studies (OASIS) brain dataset [73]. Figure 7(b-c) present the Gaussian noise injection ...
The Optical Character Recognition (OCR) results in the experiments show that the proposed procedure has the best recognition result because of the capability of edge preservation. 1. Introduction Digital images are noisy due to environmental disturbances. To ensure image quality, image processing of ...
1. An image processing apparatus comprising: an inputting unit configured to input a plurality of pieces of image data; an aligning unit configured to perform aligning processing of a plurality of images represented by the inputted image data; an average image generating unit configured to generate...
Presents a unified framework in which to model time-to-digital converters for ADPLLs Explains a procedure to predict and simulate phase noise in oscillators and ADPLLs Describes an efficient approach to model ADPLLS Part of the book series: Analog Circuits and Signal Processing (ACSP) 21k Acces...