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obtain data from a colour scaled map

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Ahmed Abdulla
Ahmed Abdulla 2019-6-13
关闭： MATLAB Answer Bot 2021-8-20
i have a map that shows magnetic field strength and it uses a color scale so that when the colour is red on the map this means that the magnitude is approaching positive maximum and if its green then its close to 0 and when it gets to blue its approaching negative infinity, and i am looking for a way so that whenever i move the cursor on the map i would know the value of the magnetic field at that point based on the colour
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Adam Danz
Adam Danz 2019-6-13
What version of matlab are you using and how was your map constructed?
Ahmed Abdulla
Ahmed Abdulla 2019-6-13
i am using MATLAB R2019a, the map is taken from a research paper so its just an image fileIMG_2830.jpg

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