How to read a plot from an image?

Attached an image containing a graph. I wish to know that is there a way that MATLAB reads the graph automatically?

[Prashant Somani]

1. What do you want as a result? Sets of point or Equation of Curve?

2. Is scale fixed? Or you want user to input scale after image reading?

[Nabhdeep Bansal]

Sir, I need sets of points as answer. Scale is fixed. (The same as that in figure).

Answer 1

[Azzi Abdelmalek]

You can use imread to read it as an image.

[Nabhdeep Bansal]

Sir, As you said, I used imread and could read the image successfully. How to read the plot lines??

[Rahul punk]

mr.nabhdeep bansal you cant read graph you extracted graph data to excel to read graph line values

,,,

Answer 2

[Image Analyst]

See this File Exchange entry: http://www.mathworks.com/matlabcentral/fileexchange/36904-matlab-script-for-digitizing-a-published-graph

Answer 3

[Walter Roberson]

There are a number of tools in the File Exchange for digitizing graphs; see http://www.mathworks.com/matlabcentral/fileexchange/?term=digitize&sort=ratings_desc

I do not think any of them are fully automated though; that would require a lot of OCR work.