Download - Introduction to OpenCV

LNMIIT DIP Winter Workshop 2011. Manohar Kuse

INTRODUCTION TO OPENCV


Outline

What is OpenCV Installing Ubuntu Installing OpenCV Coding with OpenCV References for OpenCV


What is OpenCV

C++ Library for Image Processing and Computer Vision

Developed by Intel Can take advantage of multiple

processors Developed for high performance Support for Web-cam, Microsoft Connect

and other specialized cameras


Linux Vs. Windows

Recommended : Install on Linux NOT Recommended : OpenCV on

Windows


Outline



Installing Linux

http://www.ubuntu.com/download/ubuntu/windows-installer

http://www.ubuntu.com/download/ubuntu/windows-installer


Outline



OpenCV Installation Open Synaptic Package Manager


OpenCV Installation Set Proxy


OpenCV Installation Search & Install “opencv-dev”


Outline



Sample Code

Header Files#include <stdlib.h>#include <stdio.h>#include <math.h>#include <cv.h>#include <highgui.h>

Sample code and compilation instructions : Opencv kit for download on “lnmiitdip.wordpress.com”


Sample Code

IplImage* img = 0; Declaration of opencv-image

char * fileName = “file.png”;img=cvLoadImage(fileName);

Load image as a struct


IplImage

Height : img->height Width : img->width Channels : img->nChannels

(Number of channels) Data : img->imageData

(Array of size W x H x nC


Sample Code

Iterate through the IplImage for(i=0;i<height;i++) {

for(j=0;j<width;j++) {for(k=0;k<channels;k++) {

data[i*step+j*channels+k]=255-

data[i*step+j*channels+k]; } }}


Sample Code

cvNamedWindow("mainWin“,CV_WINDOW_AUTOSIZE);

Create a display window

cvShowImage("mainWin", img ); Show Image

cvWaitKey(0); Give delay (Pause)


Links

http://www.cs.iit.edu/~agam/cs512/lect-notes/opencv-intro/opencv-intro.html

OpenCV Introduction:

OpenCV E-Book:

http://opencv.willowgarage.com/wiki/

Official Site:

“Learning OpenCV” By Gary Bradski and Adrian Kaehler

http://www.cs.iit.edu/~agam/cs512/lect-notes/opencv-intro/opencv-intro.html

http://opencv.willowgarage.com/wiki/


Download

Download “OpenCV Kit” – lnmiitdip.wordpress.com

Contains Instruction for compilation Sample code Video dataset


Thanks

Download - Introduction to OpenCV

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