matlab - matlabで長方形から長さの距離を見つける方法は?

Question

これは四角形のバイナリ イメージです: http://www.google.com/search?tbm=isch&source=mog&hl=en&gl=us&client=ms-rim&tab=wi&q=rectangle%20binary&sa=N

左（xo）と右（x1）から座標を見つけて距離の長さを見つけ、座標の下（yo）と上（y1）から幅を見つけたいと思います。ここで : 長さ » 距離(X) = |X1-X0| 幅 » 距離 (Y) = |Y1-Y0|

よろしくお願いします

Answer 1

For this input image you can simply do:

A = imread('art5.gif');
[y, x] = find(A==1);
my_length = max(x) - min(x) + 1
my_width = max(y) - min(y) + 1

This would give you:

my_length =

   171


my_width =

    89

Here since it is a logical gif, the above code would suffice. However, if the input image was in the RGB space, you would have needed:

A = im2bw(rgb2gray(imread('art5.gif')));

and if it was a grayscale image:

A = im2bw(imread('art5.gif'));

EDIT

If you're using 'BoundingBox' through the regionprops() function:

A = imread('art5.gif');
s = regionprops(A, 'BoundingBox');
my_length = s.BoundingBox(3)
my_width = s.BoundingBox(4)

This would give you:

my_length =

   171


my_width =

    89