Extract X Y Coordinates From Image. How to get xy coordinates from a binary image. This answer is not useful.
The same apply for the y value so. The one in yellow color making a wave like pattern. To extract graph coordinates it lets you manually locate the points coordinates over the graph image through the mouse.
After defining the graph range and graph.
Attached is the signal whose x y coordinates we want to extract. Clicking anywhere on the image will bring up the pixel s coordinates and rgb values. Plus a side panel to specify the range of the graph is also provided by it. Works with a wide variety of charts xy bar polar ternary maps etc.