OpenCV Projects

OpenCV Projects stands for Open Source Computer Vision

• Library of programming functions mainly aimed at real-time
• OpenCV provides simple and useful ways to read and write images

Applications OpenCV Projects

• Motion Tracking
• Gesture Recognition
• Mobile Robotics
• Augmented Reality
• Human-Computer Interaction

Key features of OpenCV Projects

• Detection of simple and complex objects
• Use mouse to interact with screen
• Cross-Platform Application interface functions
• Handling and utilization of input images

OpenCV Image Transformations

• Discrete Fourier Transform
• Affine Transform
• Discrete Cosine Transform
• Distance Transform
• Perspective Transform
• Hough Transform

OpenCV Projects Operators

• Smoothing
• Convolution
• Histogram
• Threshold

Structure of OpenCV projects

#inclde “cv.h” // Include header files

#include “ highgui.h”

Int main()

{ IplImage * input; // Variable declaration

input = cvLoadImage(“shivendu.jpg”,1); // Loads the image

cvNamedWindow(“Output”,1); // Creates a window to display image

cvShowImage(“Output”, input); // Displays the image

cvWaitKey(0); // Waits till a key is pressed

cvDestroyWindow( “Output” ); //destroy the window

cvReleaseImage( &input ); //release the memory for the image }

Sample Code for Image Masking in OpenCV:

Typedef struct CvHistogram

{

int          type;

CvArr*   bins;

float     thresh[CV_MAX_DTM] [2]; /* for uniform histograms*/

float** thresh2; /* for non-uniform histograms */

CvMatND mat; /* embedded matrix header for array histograms */

}

CvHistogram;

IplImage* mask;

mask = cvCreateImage( cvGetSize (hsv), IPL_DEPTH_8U, 1);

cvZero (mask);

cvRectangle (mask, cvPoint (10,10), cvPoint (100,100), cvScalarAll (255), CV_FILLED);

cvCalcHist (planes, hist, 0, mask);     //Compute Histogram OpenCV Projects