Haar training - where to obtain eyeglasses images?

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Hi,

I want to train a new haar-cascade for glasses as I'm not satisfied with the results I'm getting from the cascade that is included in OpenCV.

My main problem is that I'm not sure where to get eyeglasses images. I can manually search and download, but that's not practical for the amount of images I really need. I'm specifically looking for images of people wearing eyeglasses.

As this forum contain many experienced computer vision experts, I hope someone here can guide as to how to obtain images for training.

I'll also be happy to hear other approaches for detecting eyeglasses (on people).

Thanks in advance,

Gil.