Hello,
I am trying to create a window with Opencv that display a video stream and above a rectangle (gray rectangle), where the user can create images of type 1 or type 2, when he click on the gray rectangle.
When the user click "Save image type 1!" a red rectangle (First image) appear and disappear (works fine). But the rectangle "Save image type 2!" display the red rectangle (second image) with weird dimension and I can't figure out how to fix it. I think the dimensions of the button2 are good and I don't know why it's not working.
#include <opencv2\opencv.hpp>
#include <iostream>
using namespace cv;
using namespace std;
Mat3b canvas;
Mat3b canvas2;
string buttonText("Save image type 1!");
string buttonText2("Save image type 2!");
string winName = "DB creation";
Mat img1;
Rect button;
Rect button2;
int count_image1 = 0;
int count_image2 = 0;
void callBackFunc(int event, int x, int y, int flags, void* userdata)
{
if (event == EVENT_LBUTTONDOWN)
{
if (button.contains(Point(x, y)))
{
cout << "Save image of type 1" << endl;
rectangle(canvas(button), button, Scalar(0, 0, 255), 2);
imwrite("image_type1_" + std::to_string(count_image1) + ".png", img1);
count_image1++;
}
if (button2.contains(Point(x, y)))
{
cout << "Save image of type 2" << endl;
rectangle(canvas(button2), button2, Scalar(0, 0, 255), 2);
imwrite("image_type2_" + std::to_string(count_image2) + ".png", img1);
count_image2++;
}
}
if (event == EVENT_LBUTTONUP)
{
if (button.contains(Point(x, y)))
rectangle(canvas, button, Scalar(200, 200, 200), 2);
if (button2.contains(Point(x, y)))
rectangle(canvas, button2, Scalar(200, 200, 200), 2);
}
imshow(winName, canvas);
waitKey(1);
}
int main()
{
Mat img;
VideoCapture cap(0); //caméra par défault
for (;;)
{
cap >> img; // get a new frame from camera
while (img.empty()) {
std::cout << "Frame vide" << std::endl;
continue;
}
img1 = img;
//cout << "Resolution" << img.size() << endl;
// Your button
button = Rect(0, 0, img.cols/2, 50);
button2 = Rect(img.cols / 2, 0, img.cols/2, 50);
// The canvas
canvas = Mat3b(img.rows + button.height, img.cols, Vec3b(0, 0, 0));
// Draw the button
canvas(button) = Vec3b(200, 200, 200);
putText(canvas(button), buttonText, Point(button.width*0.35, button.height*0.7), FONT_HERSHEY_PLAIN, 1, Scalar(0, 0, 0));
canvas(button2) = Vec3b(200, 200, 200);
putText(canvas(button2), buttonText2, Point(button2.width*0.35, button2.height*0.7), FONT_HERSHEY_PLAIN, 1, Scalar(0, 0, 0));
// Draw the image
img.copyTo(canvas(Rect(0, button.height, img.cols, img.rows)));
//img.copyTo(canvas(Rect(0, button2.height, img.cols, img.rows)));
// Setup callback function
namedWindow(winName);
setMouseCallback(winName, callBackFunc);
imshow(winName, canvas);
waitKey(1);
}
return 0;
}
I need your help and thank you