Good resource for data sets?

Hey, all.

I’m quite new to TensorFlow and machine learning in general, and I would like to know if there are any wonderful resources out there holding large data sets to train on.

My end goal is to train an algorithm to identify dead pixels in images, so if there are any resources that specifically contain image sets or, if I’m incredibly lucky, contain image sets with dead pixels, those would be ideal.

Thanks in advance.