How to make triangle for a synthetic image in gray scale
9 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Tabish Raza
am 18 Mär. 2013
Bearbeitet: Walter Roberson
am 18 Feb. 2017
Helo me trying to make a synthetic image in gray scale with some rectangular shape and triangle but have trouble how to make triangle.
0 Kommentare
Akzeptierte Antwort
Image Analyst
am 19 Mär. 2013
Try this:
rows = 240;
columns = 320;
grayImage = zeros(rows, columns, 'uint8');
xCoords = [100 200 300];
yCoords = [80 160 80];
mask = poly2mask(xCoords, yCoords, rows, columns);
grayImage(mask) = 150; % or whatever value you want.
imshow(grayImage);
Weitere Antworten (3)
Benhassine Nasser edinne
am 18 Feb. 2017
Bearbeitet: Walter Roberson
am 18 Feb. 2017
you can make this i.e
fname = uigetfile('*.*'); % gray scale image
Io = imread(fname);
I=Io;
xCoords = [200 512 512];
yCoords = [512 128 512];
mask = poly2mask(xCoords, yCoords, size(I,1), size(I,2));
I(mask) = 0;
Iresult=I;
subplot(1,3,1);imshow(Io) ;title('original image');
subplot(1,3,2);imshow(mask) ;title('triangl mask');
subplot(1,3,3);imshow(Iresult) ;title('Result image');
0 Kommentare
Siehe auch
Produkte
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!