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How to convert pixel coordinate(returned back by imread function) to Cartesian x-coordinate and y-coordinate.

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saurabh
saurabh 2015-8-19
评论： dpb 2015-8-20
I am using matlab version 7.10.0.499 (R2010a). I am taking input as .jpg file to imread function, I am getting the pixel coordinates. I need a function which can convert pixel coordinate to Cartesian x-coordinate and y-coordinate. A=imread('file.jpg'); How to convert value present in A matrix into Cartesian x-coordinate and y-coordinate.
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saurabh
saurabh 2015-8-20
I am using MATLAB version 7.10.0.499 (R2010a).I have taken following x=1 : 1 : 10; y=2 : 2 : 20; plot(x,y); I got the Figure file. I save the figure file in fig1.fig. I need a method which will take fig1.fig as a input file and it will produce corresponding x-coordinate and y-coordinate of plotted figure in x and y vector as x =1 2 3 4 5 6 7 8 9 10 y = 2 4 6 8 10 12 14 16 18 20
dpb
dpb 2015-8-20
That would be returning the 'xdata' and 'ydata' properties from the figure. See
doc get % and set and friends
doc axes % for axes properties

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Image Analyst
Image Analyst 2015-8-19
See my attached spatial calibration demo to convert pixels into real world distances.

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