The interface Manipulate supports to display different scenes as parameter changed dynamically. eg: Manipulate[Plot[Sin[a*x], {x, 0, 10}], {a, 1, 5, 1}] If there is no step for variable a, it can vary continuously. Manipulate[Plot[x^a, {x, 0, 10}], {a, 1, 5}] It also lets us set up any number of Read more…
Sometimes the 3D model and 2D object will be overlapped as the above scene. I want to move the text to the top for avoiding overlap situation. My solution has these steps: 1. Calculate the bounding box of the sphere and convert it to a rectangle which wraps the image Read more…
We can put model in VTK display coordinate system. The following example is based on a previous article: Show Special Character In VTK . I add a line which start from (0,0) to left bottom corner of red string, the line is represented as 2D model. int *size = renderer->GetSize(); Read more…
We can use vtkTextActor to show string which contains special character. I use encoding value to represent math symbol and store it in QString object in the following example. #include <vtkActor.h> #include <vtkPolyData.h> #include <vtkRenderer.h> #include <vtkRenderWindow.h> #include <vtkRenderWindowInteractor.h> #include <vtkSmartPointer.h> #include <vtkTextActor.h> #include <vtkSphereSource.h> #include <vtkPlaneSource.h> #include <vtkPolyDataMapper.h> #include Read more…
We always use function Graphics and Graphics3D to represent items in the Wolfram Language. Use RegularPolygon to draw a triangle. Graphics[RegularPolygon[3]] Make a red octagon. Graphics[Style[RegularPolygon[8], Red]] Make a list whose elements are disks with hues varying from 0 to 1 in steps of 0.1. Table[Graphics[Style[Disk[ ], Hue[n]]], {n, 0, Read more…
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…
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 sudo make install — Installing: /usr/local/include/ITK-5.0/itkWatershedSegmentTree.h — Installing: /usr/local/include/ITK-5.0/itkMorphologicalWatershedImageFilter.h — 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 std; int main(int argc, char* argv[]) { if (argc < 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 watch the colorful world. #include <iostream> #include <stdio.h> #include <opencv2/opencv.hpp> Read more…