HOW TO GET X, Y CO-ORDINATE VALUE FROM A IMAGE FILE generated by Matlab program?

I have following vectors x = 1 : 10 :100; y = 1 : 20 :200; I have plotted using plot(x,y) command and saved the output file (.fig file) in line.jpg I need a method which will take input as line.jpg and will return me x & y in vector as

x =

     1    11    21    31    41    51    61    71    81    91

y =

     1    21    41    61    81   101   121   141   161   181

[Walter Roberson]

Did you save the output as a .fig file or as a .jpg file?

If you are saving as an image file such as .jpg, would it be possible for you to switch to using .tiff or .png files? .jpg files make this task more difficult.

[M.K.H. CHANDAN]

yes, I can save it in .png or .tiff file. That is not a problem for me.

Answer 1

[Walter Roberson]

http://www.mathworks.com/matlabcentral/fileexchange/7173-grabit

Note: it is all much easier to do from a .fig file -- the .fig file has the actual data in it.