DIGITIZE digitize data from image.
DIGITIZE with no input or output arguments allows the user to select an image file to load; only IMREAD-compatible image files are supported. The function then prompts the user to graphically identify the location of the origin and the X- and Y- axes of the plot. The user may then graphically select an arbitrary number of data points from anywhere on the image using the left mouse button. Data acquisition is terminated by clicking the right mouse button. The function then prompts the user to save the acquired data to file.