How to read a plot from an image?

2015 12 25
3 个回答
更新时间：2019 3 5
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Attached an image containing a graph. I wish to know that is there a way that MATLAB reads the graph automatically?

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Prashant Somani
Prashant Somani 2015-12-25
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
Nabhdeep Bansal 2015-12-25
Sir, I need sets of points as answer. Scale is fixed. (The same as that in figure).

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回答（3 个）

Azzi Abdelmalek
Azzi Abdelmalek 2015-12-25

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You can use imread to read it as an image.

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Nabhdeep Bansal
Nabhdeep Bansal 2015-12-25
Sir, As you said, I used imread and could read the image successfully. How to read the plot lines??
Rahul punk
Rahul punk 2019-3-5
mr.nabhdeep bansal you cant read graph you extracted graph data to excel to read graph line values
,,,

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Walter Roberson
Walter Roberson 2015-12-25

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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.

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