How to analyze the data from a graph saved as a .png image?

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Miguel Capelo
Miguel Capelo il 24 Ago 2020
Commentato: Miguel Capelo il 25 Ago 2020
Hey!
I have this .png image of some graphs and I want to store the data of all the info found in this type of graph (turbine graphs), in different vectors. Can anyone help?
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Miguel Capelo
Miguel Capelo il 24 Ago 2020
For instante, in this case identify the best efficiency point and its efficiency (94.12), and the Q, H and Power for that point (6.45 m3/s, 24.05m and aprox. 1.4MW)

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KSSV
KSSV il 24 Ago 2020
Try this file form file exchange: https://www.mathworks.com/matlabcentral/fileexchange/7173-grabit
Note that it is a tedious job and it is on our patience.
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Miguel Capelo
Miguel Capelo il 25 Ago 2020
I've already seen that, but with Grabit you have to do it yourself for every image (calibrate the axes, etc). Isn't there any code to do that automatically?

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