cvui

#include <opencv2/opencv.hpp>

// One (and only one) of your C++ files must define CVUI_IMPLEMENTATION
// before the inclusion of cvui.h to ensure its implementaiton is compiled.
#define CVUI_IMPLEMENTATION
#include "cvui.h"

#define WINDOW_NAME "CVUI Hello World!"

int main(int argc, const char *argv[])
{
	// Create a frame where components will be rendered to.
	cv::Mat frame = cv::Mat(200, 500, CV_8UC3);

	// Init cvui and tell it to create a OpenCV window, i.e. cv::namedWindow(WINDOW_NAME).
	cvui::init(WINDOW_NAME);

	while (true) {
		// Fill the frame with a nice color
		frame = cv::Scalar(49, 52, 49);

		// Render UI components to the frame
		cvui::text(frame, 110, 80, "Hello, world!");
		cvui::text(frame, 110, 120, "cvui is awesome!");

		// Update cvui stuff and show everything on the screen
		cvui::imshow(WINDOW_NAME, frame);

		if (cv::waitKey(20) == 27) {
			break;
		}
	}

	return 0;
}

import numpy as np
import cv2
import cvui

WINDOW_NAME = 'CVUI Hello World!'

# Create a frame where components will be rendered to.
frame = np.zeros((200, 500, 3), np.uint8)

# Init cvui and tell it to create a OpenCV window, i.e. cv2.namedWindow(WINDOW_NAME).
cvui.init(WINDOW_NAME)

while True:
	# Fill the frame with a nice color
	frame[:] = (49, 52, 49)

	# Render UI components to the frame
	cvui.text(frame, 110, 80, 'Hello, world!')
	cvui.text(frame, 110, 120, 'cvui is awesome!')

	# Update cvui stuff and show everything on the screen
	cvui.imshow(WINDOW_NAME, frame)

	if cv2.waitKey(20) == 27:
		break