Segment grid boxes
조회 수: 6 (최근 30일)
이전 댓글 표시
rgb = imread('peppers.png');
imshow(rgb)
hold on
M = size(rgb,1);
N = size(rgb,2);
for k = 1:25:M
x = [1 N];
y = [k k];
plot(x,y,'Color','w','LineStyle','-');
plot(x,y,'Color','k','LineStyle',':');
end
for k = 1:25:N
x = [k k];
y = [1 M];
plot(x,y,'Color','w','LineStyle','-');
plot(x,y,'Color','k','LineStyle',':');
end
hold off
Suppose I want to segment and extract individual areas of the grid .. How do I go about it ? Like, which boundary detection algorithm is used for this purpose ?
댓글 수: 2
Sean de Wolski
2011년 3월 25일
Post an image! How do you expect us to figure anything out when we can't see what you're doing!
채택된 답변
Walter Roberson
2011년 4월 12일
Regular rectangular grids, or potentially irregular spacing?
If it is a regular rectangular grid, crop to contain only full cells, detect the grid line separation, then mat2cell() or blkproc() or blockproc()
댓글 수: 3
Walter Roberson
2011년 4월 14일
Your variables hint at "first row" to "last column" which doesn't sound right. A renaming might be in order.
Now, provided that lc1 and N have been chosen to be on grid boundaries:
mat2cell(img(fc1:N+21,fr1:lc1+31), 21 * ones(1,1+(N-fc1)/21), 31 * ones(1,1+(lc1-fr1)/31))
추가 답변 (1개)
Pedro Serra
2011년 3월 24일
An answer to this question would be really nice. I'm dealing with the same issue:
I have an image upon which I've drawn a grid. I now would like to understand how can I extract individual areas of the grid?
(My final goal is to color specific areas of that grid)
Thanks in advance!
참고 항목
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!