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Thread: How to display image transformed into integral image on label?(OpenCV)

  1. #1
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    Oct 2015
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    Question How to display image transformed into integral image on label?(OpenCV)

    Hi, I would like to put the output in the white area, this is my GUIhaar.JPG,and this output擷取.JPG
    This is my code:
    Qt Code:
    1. #include "haar.h"
    2. #include "ui_haar.h"
    3. #include "opencv2/objdetect/objdetect.hpp"
    4. #include "opencv2/highgui/highgui.hpp"
    5. #include "opencv2/imgproc/imgproc.hpp"
    6. #include <iostream>
    7. using namespace std;
    8. using namespace cv;
    9. HAAR::HAAR(QWidget *parent) :
    10. QMainWindow(parent),
    11. ui(new Ui::HAAR)
    12. {
    13. ui->setupUi(this);
    14. }
    15.  
    16. HAAR::~HAAR()
    17. {
    18. delete ui;
    19. }
    20.  
    21. void HAAR::on_pushButton_clicked()
    22. {
    23. Mat frame;
    24. //VideoCapture cap(0);
    25. //while(true){
    26. //cap>>frame;
    27.  
    28. frame=cv::imread("C:\\Users\\OpenCL\\Documents\\QT Pro\\H\\1.jpg");//read image.
    29. //double t = (double)getTickCount();
    30. float A[30][30];
    31. //float **A = (float**)malloc(sizeof(float)*(frame.cols+1)*(frame.rows+1));
    32. //for(int k=0;k<frame.cols+1;k++) A[k]=(float*)malloc(sizeof(float)*(frame.rows+1));
    33. for(int i=0;i<frame.cols+1;i++) for(int j=0;j<frame.rows+1;j++)A[i][j]=0;
    34. for(int y=0;y<frame.rows;y++){
    35. float sum=0;
    36. uchar* ptr1=frame.ptr<uchar>(y);
    37. for (int x=0; x<frame.cols; x++) {
    38. sum=sum+(float)((ptr1[3*x]+ptr1[3*x+1]+ptr1[3*x+2])/3);
    39.  
    40. A[x+1][y+1] = A[x+1][y] + sum;
    41.  
    42. }
    43. cout<<endl;
    44. }
    45.  
    46. cout<<"Integration Picture:"<<endl<<endl;
    47. for(int j=0;j<frame.rows+1;j++,cout<<endl)
    48. for(int i=0 ;i<frame.cols+1;i++)
    49. {
    50. cout<<A[i][j]<<" ";
    51.  
    52.  
    53. cout<<endl;
    54. }
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  2. #2
    Join Date
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    Default Re: How to display image transformed into integral image on label?(OpenCV)

    You want the A values to be displayed in the window instead of written to stdout?

    If so just build a QString with concatenation, using QString::number() to format the floats into strings.

    Or use a QTextStream on a QString pointer and stream similar to what you have now, then take the resulting QString.

    Cheers,
    _

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