Created
August 15, 2021 14:17
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Adding a static image watermark to a live web-cam video with Python and OpenCV. Make sure to include a "watermark.png" in your directory before running this script!
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| import cv2 | |
| import numpy as np | |
| cap = cv2.VideoCapture(0) | |
| cap.set(cv2.CAP_PROP_FRAME_WIDTH, 640) | |
| cap.set(cv2.CAP_PROP_FRAME_HEIGHT, 480) | |
| logo = cv2.imread('watermark.png') | |
| size = 100 | |
| logo = cv2.resize(logo, (size, size)) | |
| img2gray = cv2.cvtColor(logo, cv2.COLOR_BGR2GRAY) | |
| ret, mask = cv2.threshold(img2gray, 1, 255, cv2.THRESH_BINARY) | |
| while cap.isOpened(): | |
| ret, frame = cap.read() | |
| if ret: | |
| frame = cv2.flip(frame, 1) | |
| roi = frame[-size-10:-10, -size-10:-10] | |
| roi[np.where(mask)] = 0 | |
| roi += logo | |
| cv2.imshow('WebCam', frame) | |
| if cv2.waitKey(25) & 0xFF == ord('q'): | |
| break | |
| else: | |
| break | |
| cap.release() | |
| cv2.destroyAllWindows() |
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