OpenCV pdf

OPENCV

Mac Ox alternative to opencv installation
According to:
http://opencv.willowgarage.com/wiki/Mac_OS_X_OpenCV_Port
(Method 2)
If you do not have macports, install it
http://www.macports.org/install.php
On a new shell, install cmake
sudo port install cmake
Check out the openCV sourceCode
svn co https://code.ros.org/svn/opencv/trunk/opencv
From the opencv directory run Cmake
sudo cmake -G "Unix Makefiles"
sudo make -j8
sudo make install

Compile the application as:
gcc -o Ej2C ejemplo2ymedio.c -I/usr/local/include/opencv
-L/usr/local/lib -lopencv_core -lopencv_highgui -lopencv_ml
-lopencv_video -lopencv_imgproc -lopencv_calib3d

Windows installation on VS 2008
Download the 2.1 installer
http://sourceforge.net/projects/opencvlibrary/files/opencv-win/2.1/OpenCV-2.1.0win32-vs2008.exe/download
Restart the computer
Follow the instructions on;
http://opencv.willowgarage.com/wiki/VisualC%2B%2B_VS2010

Library structure
From: Learning OpenCV, Gary Bradsky & Adrian Kaebler O’Reilly 2008

Example 1. camera capture and GUI
Example 2. Simple image manipulation
Example 3. RGB splitting
Example 4. Using masks
Example 5. Edges
Example 6. Pseudo color

Example 7 Non linear mapping
(x,y)
Example:
u
v
Input
= x cos
=
y
( y)
Inverse Transform
(u,v)
Output

Example 8 Histogram Backpropagation
x 1 0
4
4
3 . 5
3
2 . 5
2
1 . 5
1
0 . 5
0
0 0 . 1 0 . 2 0 . 3 0 . 4 0 . 5 0 . 6 0 . 7 0 . 8 0 . 9 1

Ex9 Cam-shift color-Tracking
The mean-shift Algorithm:
7 0 0 0
6 0 0 0
5 0 0 0
4 0 0 0
3 0 0 0
2 0 0 0
1 0 0 0
7 0 0 0
6 0 0 0
5 0 0 0
4 0 0 0
3 0 0 0
2 0 0 0
1 0 0 0
0
0
0 5 0 1 0 0 15 0 2 0 0 2 5 0
0 5 0 1 0 0 1 5 0 2 0 0 2 5 0
1. Define a window
2.find the mass center

7 0 0 0
6 0 0 0
5 0 0 0
4 0 0 0
3 0 0 0
2 0 0 0
1 0 0 0
7 000
6 000
5 000
4 000
3 000
2 000
1 000
0
0
0 5 0 10 0 15 0 200 2 50
0 5 0 1 0 0 1 5 0 2 0 0 2 5 0
3. Re-center the windows
repeat 2-3 to convergence

Cam-shift Algorithm
1. Find the object histogram.
2. Calculate the histogram backprojection on the search
window.
3. Iterate the mean-shift algorithm to find the mode on x and
y dimensions.
4. Update the center and window dimensions.
5. Go to step 2