Fast Parsing of Line Segments in a BW Mask
LINEINMASK determines portions of the line in and out of a mask
[inX inY] = LINEINMASK(XS,YS,BW,XV,YV) computes a the segments of the
line specified by verticies XV and YV that are inside the mask BW.
Points XS and YS specify the limits (or pixel values) of the
coordinates of the matrix BW.
[inX inY] = LINEINMASK(BW,XV,YV) assumes XS=1:N and YS=1:M where
[M,N]=SIZE(BW).
[inX inY] = LINEINMASK(...,METHOD) Uses the given method to create the
polygon from the mask.
Inner | Outer | {Exact}
[inX inY outX outY] = LINEINMASK(...) outputs the segments of the line
both in and out of the mask.
Example:
I = imread('rice.png');
level = graythresh(I);
bw = im2bw(I,level);
bw = bwareaopen(bw, 50);
[a b] = size(bw);
xv = b*rand(10,1);
yv = a*rand(10,1);
[inX inY outX outY] = lineinmask(bw,xv,yv,'exact');
figure
imagesc(bw)
colormap(bone)
hold on;
h1 = plot(inX,inY,'r');
h2 = plot(outX,outY,'b');
legend([h1 h2],'Inside Mask','Outside Mask');
By J Sullivan, August 2011
Citation pour cette source
Jonathan Sullivan (2024). Fast Parsing of Line Segments in a BW Mask (https://www.mathworks.com/matlabcentral/fileexchange/32863-fast-parsing-of-line-segments-in-a-bw-mask), MATLAB Central File Exchange. Récupéré le .
Compatibilité avec les versions de MATLAB
Plateformes compatibles
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- Image Processing and Computer Vision > Image Processing Toolbox > Image Segmentation and Analysis > Region and Image Properties >
Tags
Remerciements
Inspiré par : Curve intersections
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Version | Publié le | Notes de version | |
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1.0.0.0 |