python-kerasHow do I use a webcam with Python and Keras?

Using a webcam with Python and Keras is quite simple. First, we need to import the necessary packages, such as the OpenCV library, Keras, and Numpy.

import cv2
import keras
import numpy as np

Next, we need to capture the video from the webcam. We can do this with the cv2.VideoCapture() function. We can also set the resolution of the video with the set() function.

cap = cv2.VideoCapture(0)
cap.set(3,640)
cap.set(4,480)

After that, we can read the frames from the video stream. We can do this with the read() function.

ret, frame = cap.read()

Now, we can pre-process the frame for use with Keras. We can do this by resizing the frame and converting it to a Numpy array.

frame = cv2.resize(frame, (224, 224))
frame = np.array(frame, dtype=np.float32)

Finally, we can use the frame with Keras. We can do this by passing the frame into the model.

prediction = model.predict(frame)

That's all there is to using a webcam with Python and Keras.

Code explanation

1. Importing necessary packages (OpenCV, Keras, Numpy)
2. Capturing video from the webcam
3. Reading frames from the video stream
4. Pre-processing the frame
5. Using the frame with Keras

Helpful links

• OpenCV Documentation
• Keras Documentation
• Numpy Documentation

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