Rotating pcolor plot and plotting a cross-section

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Anthony
Anthony 2018-4-12
评论： Anthony 2018-4-12
I am taking an image of USAF bar targets with x-y single-pixel values. I want to plot a cross-section of the bar targets to analyze the contrast. The cross-section line must be normal to the bars on the target. You can see below that my target is not aligned perfectly. I would appreciate any help!
The main part of my code that is relevant is:
...
[X,Y] = meshgrid(x,y); % Creates a meshgrid given horizontal and vertical length increments, x and y.
A = reshape(Value,N,M); % Where N and M are the number of columns and rows respectively.
pcolor(X,Y,A);
...
This produces the following image:
Thank you in advance!

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采纳的回答

Walter Roberson
Walter Roberson 2018-4-12
For the purpose of display, probably the easiest way to do the rotation is to create a hgtransform group that you parent the image object to, and makehgtform() to create the rotation matrix which you then apply to the hgtransform group. This will have the effect of rotating what is displayed.
For taking the cross-section, improfile is happy to handle an angled line. What improfile does underneath is interp2() over the vector of coordinates.

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