Biosignal and Biomedical Image Processing phần 7 pps
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 ... color images, the data sets do not lend themselves to
arithmetic operations (and, hence, most image processing operations) since the
results do not always produce meaningful images. Index...
Biosignal and Biomedical Image Processing phần 1 pps
... the quantized signal and the input.
TLFeBOOK
Contents xvii
Data Classes: Intensity Coding Schemes 273
Data Formats 275
Data Conversions 275
Image Display 278
Image Storage and Retrieval 284
Basic ... 67
Aperiodic Functions 69
Frequency Resolution 71
Truncated Fourier Analysis: Data Windowing 71
Power Spectrum 74
MATLAB Implementation 77
Direct FFT and Windowing 77
The W...
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 ... a random time series with a narrow
bandwidth (left) and broader bandwidth (right). Note the inverse relationship be-
tween the autocorrelation function and the spectrum: the broad...
Biosignal and Biomedical Image Processing phần 11 pps
... component image)
arithmetic operations, 285–292even, 67
instantaneous autocorrelation, 150– data, 271 – 273
classes, 273 – 275 152, 165
odd, 67 conversions, 275 – 278
formats, 275 probing, 39–4
smoothing, 1 87 188 ... 150–152
Instantaneous frequency, 15 3processing, 271 –302, 303–342
block, 292–301 Intensity coding, 273 – 275
Intensity images, 273 , 345projection, 377
projection profi...
Biosignal and Biomedical Image Processing phần 4 pot
... and II, and
elliptic filters. Use a cutoff frequency of 200 Hz and assume a sampling fre-
quency of 2 kHz. For all filters, the passband ripple should be less than 3 db
and the minimum stopband ... of these ranges and is the same length as
a
. For example,
assume you desire a bandstop filter that has a passband between 0 and 100 with
a ripple of 0.01, a stopband between 300 and...
Biosignal and Biomedical Image Processing phần 5 ppt
... time,
t
0
, will always be zero, and an appropriate offset time, t
1
, is added during plot-
ting. The time and frequency boundaries are calculated using Eqs. (7) and (9),
and the resulting boundaries ... rectangle about the appropriate
time and frequency centers.
% Example 7. 2 and Figure 7. 2
% Plot of wavelet boundaries for various values of ’a’
% Determines the time and sc...
Biosignal and Biomedical Image Processing phần 6 pptx
... three-level analysis filter bank.
Examine the high frequency subband for evidence of the discontinuity.
% Example 7. 5 and Figures 7. 10 and 7. 11. Discontinuity detection
% Construct a waveform of 2 sinusoids ... coefficients:
h(n)
unknown
= [0.5 0 .75 1.2]; h(n)
match
= [0.503 0 .75 7 1.216].
ADAPTIVE SIGNAL PROCESSING
The area of adaptive signal processing is relatively new yet...
Biosignal and Biomedical Image Processing phần 8 doc
... lowpass filter (sigma = 0.5) and the
unsharpe filter (alpha = 0.2) are shown below:
h
unsharp
=
ͫ
−0.16 67 −0.66 67 −0.16 67
−0.66 67 4.3333 −0.66 67
−0.16 67 −0.66 67 −0.16 67
ͬ
;
h
gaussian
=
ͫ
0.0113 ... image I
I_add = imadd(I, J); % Adds image I and J (images and/
% or constants) to form image
% I_add
I_sub = imsubtract(I, J); % Subtracts J from image I
I_divide = i...
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 ... Transformations, and Registration 335
F
IGURE
11.13 Unaided image registration requiring several affine transforma-
tions. The left image is the original (reference) image...
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