Store Image By XML With OpenCV

We can use XML to store the OpenCV matrix and read it to recover the whole image. A simple example is in the following code snippet. We write an original image data to Untitled1.xml, then read it to generate another Mat object and show it. #include <stdio.h> #include <opencv2/opencv.hpp> #include Read more…

Combine Images

The linear blend operator for two images: dst = α⋅src1+β⋅src2+γ we can use the following interface to support combine two pictures. CV_EXPORTS_W void addWeighted(InputArray src1, double alpha, InputArray src2, double beta, double gamma, OutputArray dst, int dtype = -1); Notice: we need to use the images which have the same Read more…

Simple Examples For Handling Images With OpenCV

The original image and project are in the following part. CMakeLists.txt macro(use_cxx11) if (CMAKE_VERSION VERSION_LESS “3.1”) if (CMAKE_CXX_COMPILER_ID STREQUAL “GNU”) set (CMAKE_CXX_FLAGS “${CMAKE_CXX_FLAGS} -std=gnu++11”) endif () else () set (CMAKE_CXX_STANDARD 11) endif () endmacro(use_cxx11) cmake_minimum_required(VERSION 2.8) project( cvMat ) use_cxx11() find_package( OpenCV REQUIRED ) add_executable( ${PROJECT_NAME} “main.cpp” ) target_link_libraries( ${PROJECT_NAME} Read more…

OpenCV Mat

The copy operation for mat: cv::Mat::clone() or cv::Mat::copyTo(). Most of the copying interfaces are under the reference count mechanism. All image information is expressed by a single matrix in OpenCV. The tuple (r, g, b) is used by men to watch the colorful world. #include <iostream> #include <stdio.h> #include <opencv2/opencv.hpp> Read more…

Install And Run OpenCV On Mac

Learn from website: https://sites.google.com/site/yonasstephenfyp2013/updates/tutorialinstallingopencvonmacosxmountainlion Download opencv-4.0.1 compressed file and extract it, then go into it and build project. mkdir opencv_build cd opencv_build cmake -G “Unix Makefiles” ../ Generate Makefile successfully: — Found JNI: /Library/Developer/CommandLineTools/SDKs/MacOSX10.14.sdk/System/Library/Frameworks/JavaVM.framework — Found VTK 8.1.1 (/usr/local/lib/cmake/vtk-8.1/UseVTK.cmake) — Looking for dlerror in dl — Looking for dlerror in Read more…

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