Replace specific rectangular regions with ones

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Elysi Cochin
Elysi Cochin 2021-7-7
评论： Elysi Cochin 2021-7-9
I wanted to fill the rectangular positions in bbox (values attached in order - [x y width height]) with ones.
I tried the below code, but i dont get any white regions, what can be the reason?
mask = zeros(300,950);
load bbox
for i = length(bbox)
mask(bbox(i,1) : bbox(i,3) , bbox(i,2) : bbox(i,4)) = 1;
end
figure, imshow(mask);
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Ben McMahon
Ben McMahon 2021-7-7
编辑：Ben McMahon 2021-7-7
Your loop is currently only setting the counter to the final value. To loop over all i in a set use the : notation. For example:
for i = 1:length(bbox)
mask( bbox(i,1) : bbox(i,3) , bbox(i,2) : bbox(i,4) ) = 1;
end

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KSSV
KSSV 2021-7-7
mask = zeros(30,95);
load bb.mat
bbox = round(bb) ;
for i = length(bbox)
row1 = ceil(bbox(2));
row2 = row1 + bbox(3);
column1 = ceil(bbox(1));
column2 = column1 + bbox(4);
mask(row1:row2,column1:column2) = 1;
end
figure, imshow(mask);

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