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Opencv cơ bản

OpenCV (Open Source Computer Vision Library: http://opencv.org) is an open-source BSD-licensed library that includes several hundreds of computer vision algorithms. The document describes the so-called OpenCV 2.x API, which is essentially a C++ API, as opposite to the C-based OpenCV 1.x API. The latter is described in opencv1x.pdf. OpenCV has a modular structure, which means that the package includes several shared or static libraries. The following modules are available: • core - a compact module defining basic data structures, including the dense multi-dimensional array Mat and basic functions used by all other modules. • imgproc - an image processing module that includes linear and non-linear image filtering,. | The OpenCV Reference Manual Release 2.4.6.0 July 01 2013 CONTENTS 1 Introduction 1 1.1 API Concepts. 1 2 core. The Core Functionality 7 2.1 Basic Structures . 7 2.2 Basic C Structures and Operations. 55 2.3 Dynamic Structures . 86 2.4 Operations on Arrays.114 2.5 Drawing Functions.172 2.6 XML YAML Persistence.182 2.7 XML YAML Persistence C API . 195 2.8 Clustering . 211 2.9 Utility and System Functions and Macros . 213 3 imgproc. Image Processing 223 3.1 Image Filtering . 223 3.2 Geometric Image Transformations . 251 3.3 Miscellaneous Image Transformations . 263 3.4 Histograms . 277 3.5 Structural Analysis and Shape Descriptors . 287 3.6 Motion Analysis and Object Tracking.302 3.7 Feature Detection.306 3.8 Object Detection . 317 4 highgui. High-level GUI and Media I O 319 4.1 User Interface .319 4.2 Reading and Writing Images and Video . 324 4.3 Qt New Functions . 334 5 video. Video Analysis 341 5.1 Motion Analysis and Object Tracking . 341 6 calib3d. Camera Calibration and 3D Reconstruction 355 6.1 Camera Calibration and 3D Reconstruction . 355 7 features2d. 2D Features Framework 387 7.1 Feature Detection and Description . 387 7.2 Common Interfaces of Feature Detectors . 391 7.3 Common Interfaces of Descriptor Extractors . 401 7.4 Common Interfaces of Descriptor Matchers . 403