Plotting a 2D plot from the image

2018 5 8
2 个回答
更新时间：2018 5 8
6 次查看（30 天）

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Hello there, I need help regarding how to extract the 2d data and plot it from a image. The data file was excel worksheet and was plotted using matlab. Now suppose if I intend to plot a 2 dimensional line plot for example Distance vs intensity along the line shown, how do I do that. Please not that I am not looking for slice, I am just looking for a line plot to check the intensity fluctuation with distance.
Thank you

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Rik
Rik 2018-5-8
Do you have the original data, or the .fig file? Or is this image the only thing you have? If you have the data (or have the fig file), you can easily generate the profile. If all you have is this image, your options are severely limited, especially since jpg does not have lossless compression.
Avinash Srinivasa
编辑：Avinash Srinivasa 2018-5-8
I have the original file. Its an excel worksheet. See the comment below
Please find the .fig file attached

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回答（2 个）

Image Analyst
Image Analyst 2018-5-8

1 个投票

Load your workbook data into a 2-D array. Then you can use improfile() to get the intensity profile along any poly-line you want.
Avinash Srinivasa
编辑：Avinash Srinivasa 2018-5-8

0 个投票

I used the following code. I am unable to attach the file as its a.xlxs extension not supported by this portal
data=xlsread('file name .xlsx');
data_pos=-data;
pixmax=20;
x=pixmax/85:pixmax/85:pixmax;
y=x;
[X,Y]=meshgrid(x,y);
figure
s = surf(X,Y,data_pos);
s.EdgeColor = 'none';
daspect([1 1 0.01])
xlabel('Distance \mum', 'FontSize',20)
ylabel('Distance \mum','FontSize',20)
set(gca, 'FontSize', 20)
xticks([0 5 10 15 20 25 30])
hcb=colorbar;
title(hcb,'Intensity')
view(2)

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