... ‘ Using vectorization = %.3f\n ’ , tstop − tstart);
2.14 USINGMATLAB FOR PROCESSING SIGNALS
We are now in a position to use MATLAB to process some signals. Once a signal
is sampled (in digital ... manipulated using mathematical methods. To
illustrate, suppose we generate a set of N random samples in MATLAB as follows:
N = 1,000;
x = rand (N, 1);
Now we can plot the random vector x and play ... if (
˜
isempty (cmap) )
disp ( ′ This image has a colormap ′ );
end
[ImageHeight ImageWidth NumColorPlanes] = size (ImageMat);
image (ImageMat);
colormap (cmap);
set ( gca , ′...
... the following discussion and in subsequent chapters we sometimes refer to DigitalImage Processing
byGonzalezandWoods as “the Gonzalez- Woods book,” and to the ImageProcessing Toolbox as “IPT”
or ... DigitalImage Processing, byGonzalezand Woods, published
by Prentice Hall. The software code and supporting tools are based on the lead-
ing software package in the field: The MATLABImageProcessing ... the commands a user
has entered in the Command Window, including both current and previous
MATLAB sessions. Previously entered MATLAB commands can be selected
and re-executed from the Command History...
... plot an
image histogram.
(a)
imhist,
(b)
bar,
(c)
stem,
(d)
plot.
Digital Image
Processing
Using MATLAB
®
Second Edition
Rafael C. Gonzalez
University of Tennessee
Richard E. Woods
MedData ... Techniques 133
3.6.3 Using Fuzzy Sets
In this section we develop the foundation for using fuzzy sets, and then apply
the concepts developed here to imageprocessing in Sections 3.6.5 and 3.6.6.
We ... sections we develop and illustrate MATLAB
formulations representative of processing techniques in these two categories.
We also introduce the concept of fuzzy imageprocessingand develop sever-
al...
... with Images in MATLAB
a) Image types and classes
b) Read/write images
c) Display images
2. Basic Image Processing
a) Image contrast and brightness enhancement
b) Image arithmetic
3. Block Processing ... with Images in MATLAB
Image Types: Binary Images
• In a binary image, each pixel assumes one of only
two discrete values: 0 (off) and 1 (on).
>> imshow(bwImg)
Image ProcessingUsing MATLAB
Copyrighted ... - Create and display image object (MATLAB) .
• imagesc - Scale data and display as image (MATLAB) .
• colorbar - Display colorbar (MATLAB) .
• colormap - Sets the color map of the image (MATLAB) .
•...
... trận
31.087.065.0
75.082.056.0
02.038.048.0
73.093.037.0
71.084.019.0
92.056.016.0
APPLICATION OF IMAGE PROCESSING
C
C
Á
Á
C L
C L
Ĩ
Ĩ
NH V
NH V
Ự
Ự
LIÊN QUAN
LIÊN QUAN
APPLICATION OF IMAGE PROCESSING
APPLICATION OF IMAGE PROCESSING
APPLICATION OF IMAGE PROCESSING
Indexed Images
An ... about imageprocessing in matlab
APPLICATION OF IMAGE PROCESSING
APPLICATION OF IMAGE PROCESSING
Traffic Monitoring
Ứng dụng trong giao thông
... xix
1
Introduction 15
1.1 What Is DigitalImage Processing? 15
1.2 The Origins of DigitalImageProcessing 17
1.3 Examples of Fields that Use DigitalImageProcessing 21
1.3.1 Gamma-Ray Imaging ... Used 34
1.4 Fundamental Steps in DigitalImageProcessing 39
1.5 Components of an ImageProcessing System 42
Summary 44
References and Further Reading 45
2
Digital Image Fundamentals 34
2.1 Elements ... Sampling and Quantization 52
2.4.2 Representing Digital Images 54
2.4.3 Spatial and Gray-Level Resolution 57
2.4.4 Aliasing and Moiré Patterns 62
2.4.5 Zooming and Shrinking Digital Images 64
vii
GONZFM-i-xxii....
... Publishing, NY.
Baxes, G.A. [1994]. DigitalImage Processing: Principles and Applications, John Wiley &
Sons, NY.
Gonzalez, R. C. and Woods, R. E. [1992]. DigitalImage Processing, Addison-Wesley,
Reading, ... image
processing is intimately tied to the development of the digital computer. In fact,
digital images require so much storage and computational power that progress
in the field of digitalimage ... B. G. and Netravali,A. N. [1997]. Digital Pictures: Representation, Compression,
and Standards, Perseus Publishing, NY.
Jahne, B. [1997]. DigitalImage Processing: Concepts, Algorithms, and Scientific...
... was digitized using f
s
8 kHzand B 16.
This speech file can be viewed and played using the MATLAB script:
load(timitl.asc);
plot(timitl);
soundsc(timitl, 8000, 16);
where the MATLAB function ... filter
coefficients, b
l
and a
m
, of the digital filter defined by (3.2.18) are determined by a filter
design package such as MATLAB for given specifications. These coefficients are usually
represented using the ... a Gaussian
random variable from a uniformly distributed random variable using N ! 12. The
Gaussian random variable is frequently used in communication theory. The MATLAB
function randn generates...