Plot image in 3D and ignore certain values
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I’d like to visualise the following image (see the image) in 3D without showing the blue part (see the 3D plot). The image is basically a plane where the white part has intensity values ranging from 247 to 252. The black part has intensity value 0. Please find the image in the attachment.
Image:
3D plot:
Here is the code I am using to visualize the image in 3D:
Img_8Bit = imread('Image-1.png');
figure
surf(Img_8Bit,'EdgeColor','none');
Any suggestions?
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Rik
2018-8-6
If you switch to double, you can set the zeros to NaN, which will be hidden by surf. You'll then have to adjust the axis limits and color axis limits.
Img_8Bit = imread('Image-1.png');
Img_double=double(Img_8Bit);
Img_double(Img_double==0)=NaN;
figure(1),clf(1)
surf(Img_double,'EdgeColor','none');
axlims=[1 size(Img_double,2) 1 size(Img_double,1) 0 255];
caxis([0 255]),axis(axlims)
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