I am seeing an error, when trying to access camera with pyroch in google co lab?

Hai i am trying to detect objects through laptop camera using PyTorch in google co lab, when i run cv2 code, i am seeing an error, can anyone help me to solve the problem, here is the code:-

import cv2
import torch
import torchvision.transforms as transforms
from torchvision.models import resnet50

model = model_x_5
model.eval()
transform = transforms.Compose([
transforms.ToPILImage(),
transforms.Resize(size=(64,64)),
transforms.ToTensor(),
transforms.Normalize(mean=[0.485,0.456,0.406], std=[0.229,0.224,0.225])
])
cap = cv2.VideoCapture(0)

while True:
ret,frame = cap.read()
frame_rgb = cv2.cvtColor(frame,cv2.COLOR_BGR2RGB)
input_tensor = transform(frame_rgb)
input_tensor = input_tensor.unsqueeze(0)
with torch.no_grad():
output = model(input_tensor)
predicted_idx = torch.max(output,1)
labels = [“Toothbrush”]
predicted_label = labels[predicted_idx.item()]
cv2.putText(frame,predicted_label,(10,30),cv2.FONT_HERSHEY_SIMPLEX,1,(0,255,0),2)
cv2.imshow(“object detection”,frame)
if cv2.waitKey(1) & 0xFF == ord(‘q’):
break
cap.release()
cv2.destroyAllWindows()

error:----------------------------------------------------------------------------
error Traceback (most recent call last)
in <cell line: 17>()
17 while True:
18 ret,frame = cap.read()
—> 19 frame_rgb = cv2.cvtColor(frame,cv2.COLOR_BGR2RGB)
20 input_tensor = transform(frame_rgb)
21 input_tensor = input_tensor.unsqueeze(0)

error: OpenCV(4.7.0) /io/opencv/modules/imgproc/src/color.cpp:182: error: (-215:Assertion failed) !_src.empty() in function ‘cvtColor’

(-215:Assertion failed) !_src.empty() 

indicates the image is empty and thus OpenCV fails.
I’m unsure how Google Colab should be able to access your local webcam.

as the code runs on colab, it tries to access the camera there, which is not possible.
if you want to get access to your camera, you need to work with opencv.js (and run javascript in your browser) and then send the images to colab.

@ptrblck is there anyway to google co lab can access cam or webcam using pytorch?

I don’t know but it seems @brighteningeyes suggested an approach.

@brighteningeyes i can create opencv.js in google co lab ?, & i can add model in pytorch to opencv.js like above code?

javascript executes on your device. you need to send it to colab for processing.
if you use opencv.js, and try to execute code with javascript, it will be executed on your machine