computer vision & Opencv intro
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This document provides an introduction to OpenCV and computer vision. It discusses what computer vision is, some applications of computer vision, the history and modules of OpenCV, basic image structures and I/O functions in OpenCV, and how to compile and configure OpenCV projects.
computer vision & Opencv intro
- 2. As human we see We analyse and undrestand
- 3. But what about our computers or Robots?
- 4. But NO Eyes !! Camera But how it can be done ?
- 5. That is what we called Computer vision !!
- 6. “Computer vision is the science of endowing computers or other machines with vision, or the ability to see.” - Erik G. Learned-Miller, University of Massachusetts
- 10. Back to history ● Developed by Intel ● Maintained by WillowGarage and It SeeZ ● C/C++ ● Linux,Windows and iOS
- 11. A little bit serious..…. Let's talk about Opencv Modules
- 12. ● core → Data Structures → Basic image processing functions ● highgui → Simple user interface → Image&Video Capture
- 13. ● imgproc → basic image processing algorithms ● video → video analysis ● objdetect ● feature2d ● calib3D
- 14. Image Structure ● Iplimage → used in opencv1.x → Memory leaks if() ● Mat → no memory problem → Easy to manipulate
- 15. Image I/O ● Imread → read image from file Mat imread(const string& filename, int flags=1 ) ● Imwrite → save image to a file bool imwrite(const string& filename, InputArray img, const vector<int>& params=vector<int>() ) ● ImShow → show the image in a windows Void imshow(const string& winame, InputArray mat)
- 16. Basic draw functions ● Circle → void circle(Mat& img, Point center, int radius, const Scalar& color, int thickness=1, int lineType=8, int ● Line → void line(Mat& img, Point pt1, Point pt2, const Scalar& color, int thickness=1, int lineType=8, int shift=0) ● Ellipse → void ellipse(Mat& img, Point center, Size axes, double angle, double startAngle, double endAngle, const Scalar& color, int thickness=1, int lineType=8, int shift=0)
- 19. How to compile ? g++ urcodename.cpp -o urcode `pkg-config --cflags --libs opencv`