I'm looking at a large collection of images of graphs. I want to use the information in the images, not the images themselves. I've made a small program to extract this information, but I was wondering if it would be legal for me to use this information for commercial use? The images all have a copyright symbol on them, but I haven't been able to find it in a copyright database, so I doubt it's registered at the moment.
From a ton of googling, I would think that the information in the graphs is not subject to copyright, only the actual image of the graphs?
I think it's also possible that the specific collection of images could be copyrighted. What would happen if I simply removed some of them, so that it's now a different set?
The graphs on the images are specific measurements of specific things (like size, weight, etc.)