Environment: cmake 3.16.0-rc4 InsightToolkit-5.0.1 macOS Catalina 10.15 Build And Install ITK Download tar.gz file, extract it, create a building directory and go into it. Then build the ITK project and install it. cmake ../ -G “Unix Makefiles” \ -DModule_ItkVtkGlue:BOOL=ON make Read more…
We can use a lookup table to change the original image, the lookup table is like a simple map tool which returns a result if we give input data. #include <iostream> #include <stdio.h> #include <opencv2/opencv.hpp> using namespace cv; using namespace Read more…
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 Read more…
Learn from website：https://sites.google.com/site/yonasstephenfyp2013/updates/tutorialinstallingopencvonmacosxmountainlionDownload 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 Read more…
After upgrade vtk from 7.1.0 to 8.2.0, the old project shows a warning window about VTKWidget. The newest vtk-qt program suggest me not to use old QVTKWidget anymore, so I rewrite my qt UI file I have qt UI file Read more…
Draw The Plane Manually We can create a big plane if we know its origin and normal. The algorithm class vtkPlaneSource is a solution for it, but the generated plane is too small, it’s hard to create a big plane Read more…
They are many different cells in VTK, they can be divided into two kinds, linear cells, and non-linear cells. The following images are from VTKUsersGuide. Linear Cells Non-Linear Cells Although vtkUnstructuredGrid and vtkPolyData are similar, there are substantial differences. vtkPolyData Read more…
Here is relevant introduction about vtkImageData from VTKUsersGuide. A vtkImageData dataset is defined by data dimensions, interpoint spacing, and the origin (i.e., lower-left corner) of the dataset. If the dimension of the dataset is two, then we call the vtkImageData Read more…
Last night I read some pages in VTKUsersGuide to learn VTK factory mechanism. I got the basic steps of defining my own factory and use it. Implement virtual function which is declared in vtkObjectFactory. virtual const char* GetVTKSourceVersion(); virtual const Read more…