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By Kevin McAleer, 2 Minutes
Enhancing visual feedback is essential, especially when working with posture detection. With CVZone’s utilities like putText, you can overlay important information onto your video stream, providing real-time feedback and insights.
putText
CVZone offers a putText function similar to OpenCV’s, but with an easier interface. Let’s explore how to use it:
Basic Text Annotation:
With CVZone, you can effortlessly overlay text on images or video frames:
from cvzone.Utils import putText img = putText(img, "Detected Posture", [50, 50])
This adds the text “Detected Posture” at the coordinate (50, 50) on the image.
Displaying Dynamic Data:
Annotate the image with real-time, dynamic data, such as the angle between specific landmarks:
angle, img = detector.findAngle(lmList[11][0:2], lmList[13][0:2], lmList[15][0:2], img=img) img = putText(img, f"Angle: {angle:.2f}°", [50, 80])
Now, let’s build on our previous code to make it more sophisticated with added visualizations:
from cvzone.PoseModule import PoseDetector from cvzone.Utils import putText import cv2 cap = cv2.VideoCapture(0) detector = PoseDetector() while True: success, img = cap.read() img = detector.findPose(img) lmList, _ = detector.findPosition(img, draw=False) if lmList: angle, img = detector.findAngle(lmList[11][0:2], lmList[13][0:2], lmList[15][0:2], img=img) img = putText(img, f"Angle: {angle:.2f}°", [50, 80], fontSize=1, color=(255, 0, 255)) # Check posture and provide real-time feedback if angle > 50: feedback = "Poor Posture!" img = putText(img, feedback, [50, 120], fontSize=1.2, color=(0, 0, 255)) else: feedback = "Good Posture!" img = putText(img, feedback, [50, 120], fontSize=1.2, color=(0, 255, 0)) cv2.imshow("Image", img) cv2.waitKey(1)
Custom Annotations: Experiment with different text positions, sizes, and colors to make the feedback more intuitive.
Interactive Feedback: Use CVZone’s functionalities to draw shapes, lines, or even custom animations to make your application more interactive.
Integration: Think about integrating the posture detection system with other applications or even using it as an input method (e.g., a game controlled by your posture).
By leveraging CVZone’s comprehensive utilities, you can transform basic detection code into an informative, interactive, and user-friendly application.
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