Intel OPEN SOURCE COMPUTER VISION LIBRARY.pdfVIP

Intel? OPEN SOURCE COMPUTER VISION LIBRARY For full set of slides on the OpenCV library see the opencv documentation Introduction ? The Open Computer Vision Library is a collection of algorithms and sample code for various computer vision problems. The library is compatible with IPL and utilizes Intel Integrated Performance Primitives for better performance ? Location: /projects/opencvlibrary/ OpenCV Functionality (more than 350 algorithms) ? Basic structures and operations ? Image Analysis ? Structural Analysis ? Object Recognition ? Motion Analysis and Object Tracking ? 3D Reconstruction Feature Detection ? Fixed filters (Sobel operator, Laplacian); ? Optimal filter kernels with floating point coefficients (first, second derivatives, Laplacian) ? Special feature detection (corners) ? Canny operator ? Hough transform (find lines and line segments) ? Gradient runs Canny Edge Detector Hough Transform Detects lines in a binary image ?Probabilistic Hough Transform ?Standard Hough Transform Another Sample of the Hough Transform Using Source picture Result Contours Examples Source Picture (300x600 = 180000 pts total) Retrieved Contours (1800 pts total) After Approximation (180 pts total) And it is rather fast: ~70 FPS for 640x480 on complex scenes Motion Analysis and Object Tracking ? Background subtraction ? Motion templates ? Optical flow ? Active contours ? Estimators Camera Calibration ? Define intrinsic and extrinsic camera parameters. ? Define Distortion parameters ],[],,,[,,, 100 0 0 ,][ 3 2 1 333231 232221 131211 vupZYXP t t t T rrr rrr rrr Rcf cf A PRTAp yy xx == ? ? ? ? ? ? ? ? ? ? = ? ? ? ? ? ? ? ? ? ? = ? ? ? ? ? ? ? ? ? ? = = . )],2/(2[)(~ )],2/(2[)(~ 222 2 12 4 2 2 1 2 21 4 2 2 1 yxr yyrpxprkrkcvvv xxrpyprkrkcuuu y x += +++?+???+= +++?+???+= Camera Calibration Now, camera calibration can be done by holding checkerboard in front of the camera for a few seconds. And after that you’ll get: 3D view of etalon Un-distorted image View Morphing Da