I have several images of graphs of one-variable functions. I'd like to get samples of such functions and thus generate a table.
Right now, my best bet is using GIMP: crop, show grid, resize (so the grid fits the sample size I want). But I imagine there's a more efficient way to do this.
(The images are from different sources and quite heterogeneous. Different resolution and quality. Some of the graphs are multiplot, some of them have grids, etc)
What software would accomplish the task?