Biosignal and Biomedical Image Processing phần 4 pot
Biosignal and Biomedical Image Processing MATLAB-Based Applications Muya phần 10 potx
... texture image is constructed by
taking the regional standard deviation (Figure 12. 14) . After thresholding, this
texture-based image is also combined with the other two images.
% Example 12 .4 and ... 0 .4. The Ram-Lak reconstruction is not as sharp as the original image
and sharpness is reduced further by the cosine filter with its lowered bandwidth.
(Original image from the MA...
Biosignal and Biomedical Image Processing MATLAB-Based Applications Muya phần 9 pot
... figure.
4. Load the chirp image (
imchirp.tif
) used in Problem 2. Design a one-
dimensional 64th-order narrowband bandpass filter with cutoff frequencies of
0.1 and 0.125 Hz and apply it the chirp image. ... 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 b...
Biosignal and Biomedical Image Processing MATLAB-Based Applications Muya phần 7 potx
... proportions
D(1,:) = .5*y ؉ .5*x ؉ .1*rand(1,N);
D(2,:) = .2*y ؉ .7*x ؉ .1*rand(1,N);
D(3,:) = .7*y ؉ .2*x ؉ .1*rand(1,N);
D (4, :) = 6*y ؉ 24* x ؉ .2*rand(1,N);
D(5,:) = .6* rand(1,N); % Noise only
%
% Center ... are correlated, and this width is inversely related to the signal bandwidth. Hence, broad-
band signals remain correlated for only a few samples and vice versa.
TLFeBOOK
PCA an...
Biosignal and Biomedical Image Processing MATLAB-Based Applications Muya phần 4 ppt
... 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 40 0 Hz,
% and an upper passband gain of 1 between 500 and fs/2 ... used.
Example 4. 5 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...
Biosignal and Biomedical Image Processing MATLAB-Based Applications Muya phần 3 pot
... construct an impulse func-
tion and determine the output using the MATLAB
filter
routine.
% Example 4. 1 and Figures 4. 2 and 4. 3
% Plot the frequency characteristics and impulse response
TLFeBOOK
Spectral ... output, and
b
and
a
are the coefficients of the transfer
function in Eq. (4) .
Example 4. 1 Find and plot the frequency spectrum and the impulse re-
sponse of a dig...
Biosignal and Biomedical Image Processing MATLAB-Based Applications phần 10 pot
... reconstructed images along with the
% projections.
%
clear all; close all;
%
I = zeros(128,128); % Construct image: black
I (44 : 84, 44: 84) = 1; % background with a central
% white square
TLFeBOOK
Image ... 0 .4. The Ram-Lak reconstruction is not as sharp as the original image
and sharpness is reduced further by the cosine filter with its lowered bandwidth.
(Original image from the...
Biosignal and Biomedical Image Processing MATLAB-Based Applications Muya phần 8 pptx
... in pseudocolor
by coding the image into green and the inverse of the image into blue. Then
take a threshold and plot pixels over 80% maximum as red.
4. Load the image of a cancer cell (from rat ... 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 ou...
Biosignal and Biomedical Image Processing MATLAB-Based Applications Muya phần 6 pptx
... 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 FIR and IIR filters ... two approaches to develop the wavelet and scaling function from the filter
coefficients and vice versa. In fact, the coefficients c(n) and d(n) in Eqs. ( 14)
and (15) are simply scal...
Biosignal and Biomedical Image Processing MATLAB-Based Applications Muya phần 5 pptx
... time and
TLFeBOOK
150 Chapter 6
r
xx
(τ) =
∫
∞
−∞
x(t) x(t +τ) dt (4)
and
r
xx
(n) =
∑
M
k=1
x(k) x(k + n)(5)
where τ and n are the shift of the waveform with respect to itself.
In the standard ... magnitude and phase of
the STFT time–frequency spectrum with the rows encoding the time axis and
the columns representing the frequency axis. The optional output arguments,
f
and
t
, ar...
Biosignal and Biomedical Image Processing MATLAB-Based Applications Muya phần 2 docx
... box and record the following output:
Frequency (Hz): 2 10 20 60 100 125 150 200 300 40 0
V
out
volts rms: .15×10
−7
0.1×10
−3
0.002 0.2 1.5 3.28 4. 47 4. 97 4. 99 5.0
What is the cutoff frequency and ... used
below are presented in Chapter 4.
Example 2.2 Generate bandlimited noise and compute and plot the auto-
correlation function for two different bandwidths.
% Example 2.2 an...