Hi,

How can I extract data from this picture?

http://i.imgur.com/iY362Js.png

The caption of the picture reads: " Two-dimensional histogram values measured . Tick labels on the color bar are bin counts (17 force bins, 32 lifetime bins, and n = 803 observations)"

I divided the image into two parts: 1st the main graph and 2nd the legend. I am trying to extract average pixel in the each block but I am not able to do so becuase the edges between the boxes are not well defined... so, I am trying to define the edges, which is kinda hard to do accurately.

Do you guys have better algorithm to extract data?