Opencv c ++ how to display a text (letter) on the webcam in c++?

Question

I’m using, open source, sorry, I’m beginner, I want to change it on if and else:

 else if (!thumbIsOpen && !firstFingerIsOpen && !secondFingerIsOpen && !thirdFingerIsOpen && !fourthFingerIsOpen)
    {
        LOG(INFO) << "FIST!";
    }

instead of log, I want to show the word on webcam how to do this in C++?

or any tips on how to fix Python with C++...

Thank you!

Answer 1

So describing succinctly, without treating the possibility of failure, as empty frame or the camera has not been opened, together with the answer to the question, we have:

// Inicializa a camera
VideoCapture camera;

for(;;)
{

    Mat frame;

    // Passa o frame capturado para a variável
    camera >> frame;

    // Escrevendo em vermelho "Texto na Imagem", no frame a cada novo frame
    cv2.putText(frame, "Texto na Imagem", (0, 100), cv2.FONT_HERSHEY_SIMPLEX, 1, (0, 0, 255));

    // Exibe a imagem com o texto
    cv2.imshow("Nome da Janela de Exibicao", frame);

    // Para a execução ao pressionar ESC
    if(waitKey(10) == 27)
    {
        break;
    }

}