DIGITIZEIMG2 Starts a GUI for digitizing graphs.
Can be used for multiple data sets per graph and NOs
if a data point is marked incorrectly.
Use:
Follow the instructions of the GUI.
RIGHT CLICK: Choose data point
LEFT CLICK: Finish
MIDDLE MOUSE BUTTON: NO of the last data point

Syntax: digitizeImg2
opens an file picker. Can only be used on data types that are
compatible with IMREAD.
After choosing a file, a GUI will open that will guide you through
the steps required for extracting the data.
If called without outputs, the data is saved in a MAT
file.

ImgData = digitizeImg2;
Saves the data in the matrix/struct ImgData (struct if more than one data set).

digitizeImg2(filename);
To choose the file directly.

see also: IMREAD, IMFINFO

Input arguments:

- filename: file name of the image to be digitized (optional)

Output arguments:

- ImgData: X- and Y-coordinates of the digitized graphs

Author: Marc Jakobi - 15.12.2015
Original versions: digitize (by J.D.Cogdell) / digitize2 (by A. Prasad)