opencv start up · installation read and display a image opencv start up dr. praveen sankaran...

InstallationRead and Display a Image

OpenCV Start UP

Dr. Praveen Sankaran

Department of ECE

NIT Calicut

January 29, 2013

Dr. Praveen Sankaran DIP Winter 2013


Outline

1 InstallationOpenCVcmake

2 Read and Display a Image



OpenCVcmake

OpenCV

There is nothing here that you couldn't have obtained from a bit ofan on-line search. But, as usual, I will pamper all of you with thesedetails.

Source: http://opencv.org/

Version does not really matter for us, since we will mostly belooking at very basic image processing functionalities.

Version 2.3 seems good enough (seems like a major changefrom 2.1 to 2.3).

Ubuntu 12.04 LTS recommended since it comes with OpenCV2.3 in the repositories.



OpenCVcmake

Outline





OpenCVcmake

Installation Synaptic - Ubuntu



OpenCVcmake

Installation OpenCV from Synaptic



OpenCVcmake

From Terminal

sudo apt-get install libopencv-dev

will install 2.3 on 12.04LTS.

You will have to go back to synaptic and install some missinginstallations anyway.



OpenCVcmake

Check



OpenCVcmake

Outline





OpenCVcmake

Install



Read Image Program from OpenCV docs

#i n c l u d e <cv . h>#i n c l u d e <h i g h gu i . h>

u s i n g namespace cv ;

i n t main ( i n t argc , cha r ∗∗ a rgv ){

Mat image ;image = imread ( a rgv [ 1 ] , 1 ) ;

i f ( a rgc != 2 | | ! image . data ){

p r i n t f ( "No image data \n" ) ;r e t u r n −1;

}

namedWindow( " D i s p l a y Image " , CV_WINDOW_AUTOSIZE ) ;imshow ( " D i s p l a y Image " , image ) ;

waitKey ( 0 ) ;

r e t u r n 0 ;}



Working Folder at this Stage



CMakeLists.txt

p r o j e c t ( openCvDispa ly Image )f ind_package ( OpenCV REQUIRED )add_executab le ( d i sp Image d i sp Image )t a r g e t_ l i n k_ l i b r a r i e s ( openCvDispa ly Image$ {OpenCV_LIBS})



CMake



Make



Running


opencv start up · installation read and display a image opencv start up dr. praveen sankaran...

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