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By Kevin McAleer, 2 Minutes
Face detection is the process of identifying and locating faces in images or videos. In this lesson, we’ll harness the power of CVZone, a computer vision library, to detect faces in real-time using a Raspberry Pi.
Capture video from the camera:
import cv2 cap = cv2.VideoCapture(0)
Here, we’re utilizing the OpenCV (cv2) library to capture live video feed from the default camera (indexed as 0). The VideoCapture function initializes the camera and prepares it to stream frames.
0
VideoCapture
Use CVZone to detect face:
import cvzone from cvzone import FaceDetectionModule face_detector = FaceDetectionModule.FaceDetector() while True: success, img = cap.read() img, list_faces = face_detector.findFaces(img) cv2.imshow("Face Detection", img) if cv2.waitKey(1) & 0xFF == ord('q'): break
In this section, we:
cap.read()
face_detector.findFaces(img)
cv2.imshow()
Multiple Face Detection: The provided code can detect multiple faces in a frame. The list_faces variable contains details about all detected faces.
list_faces
Enhance Visualization: You can further customize the appearance by adjusting the color, thickness, and style of bounding boxes around detected faces.
Integrate with Other Modules: Once a face is detected, you can integrate it with other functionalities such as face recognition, emotion detection, or facial landmarks detection to add more depth to your application.
Optimization: To improve performance on Raspberry Pi, consider reducing the frame size or using a lower resolution camera, optimizing the model parameters, or integrating with other acceleration techniques.
Remember, the beauty of computer vision lies in its vast potential for customization and integration. Take the basics you learn here and let your creativity drive your projects!
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