aliasing artifacts and noise in ct images

Ngày tải lên: 03/07/2014, 21:09

... μ x are mean intensities of original and restored images, σ r and σ x are standard deviations of original and restored images, r p and x p are the image contents of pth local window, and G is the ... salt, and pepper noise and random valued impulse noise. Salt and pepper noise is sometimes called fixed valued impulse noise producing two gray level values 0 and 255. Random valued impulse noise ... by salt and pepper noise. EURASIP Journal on Advances in Signal Processing 5 Array labeled Y 2 depicts the current processing window and a pepper noise pixel. The square shown in solid line represents...

Ngày tải lên: 21/06/2014, 16:20

... C. and Voutilainen, A. 1997. Compar- ing a Linguistic and a Stochastic Tagger. In Pro- ceedings of joint E/A CL meeting. 1001 On the Evaluation and Comparison of Taggers: the Effect of Noise ... Polysemy in Information Retrieval. In Proceedings of joint E/A CL meeting. M~trquez, L. and Padr6, L. 1997. A Flexible POS Tagger Using an Automatically Acquired Lan- guage Model. In Proceedings ... in most cases. In this direction, the present paper aims to point out some of the difficulties arising when evaluating and comparing tagger performances against a reference test corpus, and...

Ngày tải lên: 08/03/2014, 05:21

... dissipation (Nowick and Berry, 1972). 72 K. Numata (1) Understanding and reducing mechanical losses in coatings materials and validating this in direct thermal noise measurements. (2) Direct measurement ... measurements. r Thermal noise: mirror thermal noise and suspension/spacer thermal noise. r Optical readout noise: shot noise and radiation pressure noise. r Laser noises: laser frequency noise and laser intensity noise. r Non-fundamental ... fluctuations, the effect of the intensity noise is effectively reduced. Experimentally, this effect can be evaluated by determining the (frequency dependent) “coupling factor” x rms , including...

Ngày tải lên: 30/03/2014, 19:20

Ngày tải lên: 21/06/2014, 18:20

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Ngày tải lên: 23/06/2014, 01:20

Ngày tải lên: 09/08/2014, 07:21

Ngày tải lên: 09/08/2014, 09:21

Ngày tải lên: 09/08/2014, 10:20

Ngày tải lên: 13/08/2014, 09:54

... are true with respect to destructors? [2.0] a) Destructors can be invoked explicitly. c) When an instance is destructed, the destructors in an inheritance chain are called in order, from most ... Casting c) Unboxing b) Boxing d) Overriding 33. __________is all about converting a reference type into a value type. [1.0] a) Overloading c) Unboxing b) Boxing d) Casting 34. Unboxing ... statement’s syntax is incorrect. 51. using System; class Test { static void Main() { int @Main; int[] Static= new int[3]; @Main =100*Static[1]; Console.WriteLine(@Main); } } What...

Ngày tải lên: 21/08/2012, 15:55

... an instance of object in the following manner. Type myObjectType = Type.GetTypeFromProgID ("MyDll.MyObjectName") object myObject = System.Reflectrion. CreatInstance(myObjectType) ... to an int data type. 203. Which of the following is the correct syntax for declaring an indexer. [1.0] a) protected int this[int var1] c) public int this(int var1) b) public int classname[int ... Main(string[] args) { IntIndexer myInd = new IntIndexer(5); myInd[1] = "Some Value"; myInd[4] = "Any Value"; myInd[2] = "Another Value"; Console.WriteLine("\nIndexer...

Ngày tải lên: 29/08/2012, 16:37

... a memory object and offset within that memory object. Additional information stored for each range includes protection and inheritance information. To account for sharing through inheritance, ... object port, attempting to find an associated internal memory object structure; if none exists, a new internal structure is created, and the pager_init call performed. Once a memory object structure ... than reflecting it in other tasks that have also mapped that memory object. 5.2. Virtual Memory Object Structures An internal memory object structure is kept for each memory object used in an address...

Ngày tải lên: 12/09/2012, 15:05

Ngày tải lên: 12/09/2012, 15:05

... by the function involves only one object  In general, use a nonmember function if the task performed by the function involves more than one object  Choosing to make the nonmember function a friend ... program using function equal is found in Slide 11- 49 Copyright â 2007 Pearson Education, Inc. Publishing as Pearson Addison-Wesley Operand 1 Operator Operand 2 Overloading << and >>  The ... function is not a member function  A friend function is an ordinary function  A friend function has extraordinary access to data members of the class  As a friend function, the more efficient...

Ngày tải lên: 12/09/2012, 22:53

... samples in the signal that have a value within a certain range. For example, imagine a floating point signal that contains values between 0.0 and 10.0, and a histogram with 1000 bins. Bin 0 in the histogram ... and standard deviation using these equations. Calculation of the histogram is very fast, since it only requires indexing and incrementing. In comparison, Chapter 2- Statistics, Probability and ... calibration. In actual practice there are many ways that precision and accuracy can become intertwined. For example, imagine building an electronic amplifier from 1% resistors. This tolerance indicates...

Ngày tải lên: 13/09/2012, 09:49

... of beginning and ending temperatures through 20 o C, 25 o C. The dates of beginning and ending temperatures through 20 o C, 25 o C are very important for defining the crop calendar and crop ... METHODOLOGY AND DATA  Used methods of statistical analyze in climate and Agrometeorology.  Data have been collected in some main stations in 7 Ago-economic region: + North mountain and midland + ... Minh) -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1961 1963 1965 1967 1969 1971 1973 1975 1977 1979 1981 1983 1985 1987 1989 1991 1993 1995 1997 1999 2001 2003 2005 ∆ T( o C) INTRODUCTION As seen in Figure climate change, desertification and loss of biological diersity are intimately conected to one another- they overlap and affect, and are affectedby,...

Ngày tải lên: 23/09/2012, 15:10

... confounding eect involves two variables: smoking and age. If Predictor 2 is smoking, and Predictor 3 is age, then this com- bined eect will be underestimated in serial bivariate equations. is eect ... the experimental predictor is coee drinking and the outcome is cancer; and let us suppose that the main confounding factor is smoking but that this eect is primarily seen in older smokers rather ... hand could be explained in terms of some extraneous factor” (Miettinen and Cook, 1981). And again: “By ‘extraneous factor’ is meant something other than the exposure or the illness – a characteristic of...

Ngày tải lên: 24/09/2012, 09:06