Add fp32 to in8 conversion notebook. Removed imread-from-url library dependency. Minor fixes

[mokshmalik5757]

I have made some minor fixes in your code. Changed .gitignore file extension. Removed imread-from-url dependency and created a custom function using requests library for reading images from URL. Fixed the requirements.txt. Changed function in sam2/utils.py.

[ibaiGorordo]

Thank you for trying to improve the code.

In my case I get Error 403, when trying to get the image. The error disappears using this instead:

ua = UserAgent()
header = {'User-Agent': str(ua.chrome)}
response = requests.get(img_url, headers=header)

After fixing that though, the if img: check returns ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

SInce I don't mind the imread_from_url dependency, if you roll back that part I would appreciate it.

[mokshmalik5757]

I have reverted back the changes with "imread_from_url" dependency, and I have also fixed the error ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all() while executing the if image check.

[mokshmalik5757]

I'd also like to suggest that you should add the notebook for converting the PyTorch model of SAM 2 to ONNX in the notebooks directory that I've created, that way, one would be able to reference all the conversion code in a single directory.