Created
July 7, 2022 14:35
-
-
Save rvalue/061f48d45720bf8cda4c148122a900ba to your computer and use it in GitHub Desktop.
OpenCV Trackbar
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
import numpy as np | |
import cv2 | |
def update(image, args): | |
print("Scale: " + str(args)) | |
fontFace = cv2.FONT_HERSHEY_SIMPLEX | |
pixelHeight = int(image.shape[0] * args / 100) | |
thickness = 1 | |
org = (0, pixelHeight) | |
lineType = cv2.LINE_AA | |
fontScale = cv2.getFontScaleFromHeight(fontFace, pixelHeight, thickness) | |
color = (255, 255, 255) | |
imgShow = image.copy() | |
cv2.putText(imgShow, "Hello World", org, fontFace, fontScale, color, thickness, lineType) | |
cv2.imshow(WINDOW_NAME, imgShow) | |
def main(): | |
image = np.zeros((500, 500, 3), dtype=np.uint8) | |
cv2.namedWindow(WINDOW_NAME, cv2.WINDOW_NORMAL) | |
cv2.createTrackbar(TRACKBAR_NAME, WINDOW_NAME, 0, 100, lambda args: update(image, args)) | |
update(image, 10) | |
cv2.setTrackbarPos(TRACKBAR_NAME, WINDOW_NAME, 10) | |
# Press any key to quit | |
cv2.waitKey(0) | |
cv2.destroyAllWindows() | |
if __name__ == '__main__': | |
WINDOW_NAME = "Trackbar Example" | |
TRACKBAR_NAME = "Scale" | |
main() |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment