Biosignal and Biomedical Image Processing MATLAB-Based Applications Muya phần 9 pot

... as the original image and sharpness is reduced further by the cosine filter with its lowered bandwidth. (Original image from the MATLAB Image Processing Toolbox. Copyright 199 3– 2003, The Math ... intensity thresh- olded images are shown in Figure 12.15 (upper images; the upper right image has been inverted). These images are combined in the lower left image. The lower right im...

Ngày tải lên: 23/07/2014, 19:20

... rotated image and the original image. ) 9. Load a frame of the MRI image ( mri.tif ) and perform a spatial transfor- mation that first expands the image horizontally by 20% then rotates the image by ... Example 11 .9 Interactive Image Registration % Load a frame of the MRI image (mri.tif) and perform a spatial % transformation that tilts the image backward and displac...

Ngày tải lên: 23/07/2014, 19:20

... shape) where I1 and h are image and filter coefficients (or two images, or simply two matrices) to be convolved and shape is an optional argument that controls the size of the output image. If shape ... emphasize the left and right boundaries. % Example 10.6 and Figure 10 .9 % Demonstration of sliding neighborhood operations % Load image of blood cells, blood.tiff from the Im...

Ngày tải lên: 23/07/2014, 19:20

... compo- nents. % Example 9. 3 and Figure 9. 12, 9. 13, 9. 14, and 9. 15 % Example of ICA % Create a mixture using three different signals mixed five ways % plus noise % Use this in PCA and ICA analysis % clear ... *sin(w*12) ؉ .1*randn(1,N); % Double sin, a sawtooth s2 = sawtooth(w*5,.5)؉ .1*randn(1,N); % and a periodic % function s3 = pulstran((0 :99 9),(0:5)’*180,kaiser(100,3))...

Ngày tải lên: 23/07/2014, 19:20

... analysis applications only the subband signals are of interest and reconstruction is not needed, but in many wavelet applications, some operation is performed on the subband signals, y lp (n) and y hp (n), ... with a small bandwidth and a p eak a t 10 H z. TLFeBOOK 8 Advanced Signal Processing Techniques: Optimal and Adaptive Filters OPTIMAL SIGNAL PROCESSING: WIENER FILTERS The...

Ngày tải lên: 23/07/2014, 19:20

... Eq. (9) to give a new function, G(u,τ): G(u,τ) = ∫ ∞ −∞ g(v,τ)e jπvu dv (11) where the new function, G(u,τ) is referred to as the determining function (Boashash and Reilly, 199 2). Then Eq. (9) ... signal and an imaginary part that is the Hilbert Transform of the real signal (Cohen, 198 9). This is the approach used by the MATLAB routine hilbert and the routine hilber on the disk, and...

Ngày tải lên: 23/07/2014, 19:20

... Example 4.5 and Figure 4.13 % Bandstop filter with a passband gain of 1 between 0 and 100, % a stopband gain of -40 db between 300 and 400 Hz, % and an upper passband gain of 1 between 500 and fs/2 ... Design a bandstop filter having the following characteris- tics: a passband gain of 1 (0 db) between 0 and 100, a stopband gain of −40 db between 300 and 400 Hz, and an upper pa...

Ngày tải lên: 23/07/2014, 19:20

... and the development of useful approaches for this frequency decomposition has a long and rich history (Marple, 198 7). Spectral analysis can be thought of as a mathematical prism (Hubbard, 199 8), ... Hz and white noise; SNR =−15db. Generate the power spectrum as the square of the magnitude obtained using the Fourier transform. Put the signal generator commands and spectral analysis c...

Ngày tải lên: 23/07/2014, 19:20

... Generate bandlimited noise and compute and plot the auto- correlation function for two different bandwidths. % Example 2.2 and Figure 2.8 % Generate colored noise having two different bandwidths % and ... random variable are its mean, or average value, and its variance, the term σ 2 in Eq. (1). The arithmetic quantities of mean and variance are frequently used in signal processin...

Ngày tải lên: 23/07/2014, 19:20

... 2 59 MATLAB Implementation 265 Problems 270 10 Fundamentals of Image Processing: MATLAB Image Processing Toolbox 271 Image Processing Basics: MATLAB Image Formats 271 General Image Formats: Image ... to biomedical applications. The last four chapters cover image processing, with the first of these, Chapter 10, covering the conventions used by MATLAB’s Imaging Processi...

Ngày tải lên: 23/07/2014, 19:20