Biosignal and Biomedical Image Processing phần 5 ppt
Biosignal and Biomedical Image Processing phần 5 ppt
... Uses the equations for center time and frequency and for time
% and frequency spread given in Eqs. (7–10)
%
TLFeBOOK
Time–Frequency Analysis 1 75
F
IGURE
6. 15 The Rihaczek-Margenau distribution ... evidenced by the appearance of
energy slightly before 0 .5 sec and slightly after 1 .5 sec, and energies at frequen-
cies other than 10 and 40 Hz. In this example, the time resolut...
Biosignal and Biomedical Image Processing phần 6 pptx
... given in Problem 5.
% Example 8 .5 and Figure 8.10 Adaptive Noise Cancellation
% Use an adaptive filter to eliminate sinusoidal noise from a
% narrowband signal
%
% Generate signal and noise
close ... filter
%
close all; clear all;
fig1 = figure(’Units’,’inches’,’Position’,[0 2 .5 3 3 .5] );
fig2 = figure(’Units’, ’inches’,’Position’,[3 2 .5 5 5] );
fs = 1000; % Sample frequency
TLF...
Biosignal and Biomedical Image Processing phần 1 pps
... Correlation, and Covariance 43
Convolution and the Impulse Response 43
Covariance and Correlation 46
MATLAB Implementation 49
Sampling Theory and Finite Data Considerations 53
Edge Effects 57
Problems 58
3 ... 8-bit binary number capable of 2
8
or 256 discrete states,
and the input amplitude range is 0.0 5. 0 volts, then the quantization interval
will be 5/ 256 or 0.01 95 vo...
Biosignal and Biomedical Image Processing phần 2 pps
... signal
processing algorithms and data that can be used to evaluate a signal processing
system under development. The Web is becoming an evermore useful tool in
signal and image processing, and a ... box and record the following output:
Frequency (Hz): 2 10 20 60 100 1 25 150 200 300 400
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...
Biosignal and Biomedical Image Processing phần 4 pot
... 0.1, and an
upper passband between 50 0 and 1000 Hz (assuming f
s
/2 = 1000) with the same
ripple as the lower passband. The
f
,
a
, and
dev
vectors would be:
f = [100
300 400 50 0]
;
a = [101]
; and
dev ... response: a 15th order Parks–McClellan; a 15th-order rectangular window;
a 30th-order rectangular window; and a 15th-order least squares
firls
. Use a
bandwidth of 0. 15 f
s...
Biosignal and Biomedical Image Processing phần 7 pps
... four different image classes or encoding schemes are: indexed images,
RGB images, intensity images, and binary images. The first two classes are used
to store color images. In indexed images, the ... sawtooth(w *5, .5) ؉ .1*randn(1,N); % and a periodic
% function
s3 = pulstran((0:999),(0 :5) ’*180,kaiser(100,3)) ؉
.07*randn(1,N);
%
% Plot original signals displaced for viewing
TLFeBOOK...
Biosignal and Biomedical Image Processing phần 8 doc
... weighted sum of images. For
example to add 0 .5 of image I1 to 0.3 of image I2, to 0. 75 of Image I3, use:
% Linear combination of images
I_combined = imlincomb ( .5, I1, .3, I2, . 75, I3);
The arithmetic ... 11.3 and Figure 11.5A and B
% Linear filtering. Load the blood cell image
% Apply a 32nd order lowpass filter having a bandwidth of .1 25
% fs/2, and a highpass filter h...
Biosignal and Biomedical Image Processing phần 9 pot
... rotated image and the origin al 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 ... montage of the first 12 images.
8. Load frame 12 of
mri.tif
and use
imrotate
to rotate the image by 15
degrees clockwise. Also reduce image contra st of the rotated image...
Biosignal and Biomedical Image Processing phần 10 pdf
... nominal image range. The 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 ... the square pattern of Figure
13 .5 sampled with one-half (left-hand image) and one-quarter (right-hand im-
age) the number of parallel beams used in Figure 13 .5. The images have b...
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