January 2018 – Water's Home

Install VTK

water@waters-MacBook-Pro:~/Downloads/VTK-8.1.0/build$ cmake ..

water@waters-MacBook-Pro:~/Downloads/VTK-8.1.0/build$ make

water@waters-MacBook-Pro:~/Downloads/VTK-8.1.0/build$ sudo make install

Install QT5

water@waters-MacBook-Pro:~/Documents/GitHub/opencv/build$ brew install qt5

water@waters-MacBook-Pro:~/Documents/GitHub/opencv/build$ export "PATH=/usr/local/opt/qt/bin:$PATH"

Install OpenCV & OpenCV_contrib

[email protected]:~/Documents/GitHub/opencv/build$ cmake -DCMAKE_BUILD_TYPE=Release -DWITH_OPENGL=ON -DWITH_OPENVX=ON -DWITH_QT=ON -DWITH_OPENCL=ON -DOPENCV_EXTRA_MODULES_PATH=/Users/water/Documents/GitHub/opencv_contrib/modules –DWITH_VTK=ON -DVTK_DIR=/Users/water/Downloads/VTK-8.1.0 ..

water@waters-MacBook-Pro:~/Documents/GitHub/opencv/build$ make -j8

water@waters-MacBook-Pro:~/Documents/GitHub/opencv/build$ sudo make install

Test VIZ

```
#include <opencv2/viz.hpp>
```
```
#include <opencv2/calib3d.hpp>
```
```
#include <iostream>
```
```
 
```
```
using namespace cv;
```
```
using namespace std;
```
```
 
```
```
/*
```
```
 * @function main
```
```
 */
```
```
int main()
```
```
{
```
```
    /// Create a window
```

    viz::Viz3d myWindow("Coordinate Frame");

```
 
```
```
    /// Add coordinate axes
```

    myWindow.showWidget("Coordinate Widget", viz::WCoordinateSystem());

```
 
```

    /// Add line to represent (1,1,1) axis

    viz::WLine axis(Point3f(-1.0f,-1.0f,-1.0f), Point3f(1.0f,1.0f,1.0f));

    axis.setRenderingProperty(viz::LINE_WIDTH, 4.0);

    myWindow.showWidget("Line Widget", axis);

```
 
```
```
    /// Construct a cube widget
```

    viz::WCube cube_widget(Point3f(0.5,0.5,0.0), Point3f(0.0,0.0,-0.5), true, viz::Color::blue());

    cube_widget.setRenderingProperty(viz::LINE_WIDTH, 4.0);

```
 
```

    /// Display widget (update if already displayed)

    myWindow.showWidget("Cube Widget", cube_widget);

```
 
```
```
    /// Rodrigues vector
```

    Mat rot_vec = Mat::zeros(1,3,CV_32F);

    float translation_phase = 0.0, translation = 0.0;

```
    while(!myWindow.wasStopped())
```
```
    {
```
```
        /* Rotation using rodrigues */
```
```
        /// Rotate around (1,1,1)
```

        rot_vec.at<float>(0,0) += CV_PI * 0.01f;

        rot_vec.at<float>(0,1) += CV_PI * 0.01f;

        rot_vec.at<float>(0,2) += CV_PI * 0.01f;

```
 
```
```
        /// Shift on (1,1,1)
```

        translation_phase += CV_PI * 0.01f;

        translation = sin(translation_phase);

```
 
```
```
        Mat rot_mat;
```
```
        Rodrigues(rot_vec, rot_mat);
```
```
 
```
```
        /// Construct pose
```

        Affine3f pose(rot_mat, Vec3f(translation, translation, translation));

```
 
```

        myWindow.setWidgetPose("Cube Widget", pose);

```
 
```
```
        myWindow.spinOnce(1, true);
```
```
    }
```
```
 
```
```
    return 0;
```
```
}
```

Test OpenGL

```
#include <iostream>
```
```
#include <string>
```
```
#include <sstream>
```
```
using namespace std;
```
```
 
```
```
// OpenGL includes
```
```
#ifdef __APPLE__
```
```
#include <OpenGL/gl.h>
```
```
#else
```
```
#include <GL/gl.h>
```
```
#endif
```
```
 
```
```
// OpenCV includes
```
```
#include "opencv2/core.hpp"
```
```
#include "opencv2/imgproc.hpp"
```
```
#include "opencv2/highgui.hpp"
```
```
using namespace cv;
```
```
 
```
```
Mat frame;
```
```
GLfloat angle= 0.0;
```
```
GLuint texture;
```
```
VideoCapture camera;
```
```
 
```
```
int loadTexture() {
```
```
 
```
```
    if (frame.data==NULL) return -1;
```
```
 
```

    glBindTexture( GL_TEXTURE_2D, texture ); //bind the texture to it's array

    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);

    glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);

```
 
```

    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

```
 
```

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, frame.cols, frame.rows,0, GL_BGR, GL_UNSIGNED_BYTE, frame.data);

```
    return 0;
```
```
 
```
```
}
```
```
 
```
```
void on_opengl(void* param)
```
```
{
```
```
    glLoadIdentity();
```
```
    // Load Texture
```

    glBindTexture( GL_TEXTURE_2D, texture );

```
    // Rotate plane
```

    glRotatef( angle, 1.0f, 1.0f, 1.0f );

```
    // Create the plate
```
```
    glBegin (GL_QUADS);
```

    glTexCoord2d(0.0,0.0); glVertex2d(-1.0,-1.0);

    glTexCoord2d(1.0,0.0); glVertex2d(+1.0,-1.0);

    glTexCoord2d(1.0,1.0); glVertex2d(+1.0,+1.0);

    glTexCoord2d(0.0,1.0); glVertex2d(-1.0,+1.0);

```
    glEnd();
```
```
 
```
```
}
```
```
 
```
```
int main( int argc, const char** argv )
```
```
{
```
```
    // Open WebCam
```
```
    camera.open(0);
```
```
    if(!camera.isOpened())
```
```
        return -1;
```
```
 
```
```
    // Create new windows
```

    namedWindow("OpenGL Camera", WINDOW_OPENGL);

```
 
```
```
    // Enable texture
```
```
    glEnable( GL_TEXTURE_2D );
```
```
    glGenTextures(1, &texture);
```
```
 
```

    setOpenGlDrawCallback("OpenGL Camera", on_opengl);

```
 
```
```
    while(waitKey(30)!='q'){
```
```
        camera >> frame;
```
```
        // Create first texture
```
```
        loadTexture();
```
```
        updateWindow("OpenGL Camera");
```
```
        angle =angle+4;
```
```
    }
```
```
 
```
```
 
```
```
	// Destroy the windows
```
```
	destroyWindow("OpenGL Camera");
```
```
 
```
```
	return 0;
```
```
}
```

Month: January 2018

How to Install OpenCV3 WITH_VTK WITH_OPENGL on macOS High Sierra 10.13.3

Install VTK

Install QT5

Install OpenCV & OpenCV_contrib

Test VIZ

Test OpenGL

How to Install Tesseract With All Languages

Install tesseract

Have a test

Install chi-sim.traineddata

Have a test

Cross Compiler Toolchain (arm-linux-gcc 32bit & CentOS 7 64 Bit)

Install GLIBC & ZLIB

Install GLIBC & ZLIB