CODEWITHSUNDEEP
matlabcoordinatesbounding-box
soupault
soupault

Reputation: 6510

Coordinates of figure on array

What is the shortest way to find coordinates of figure left/right/top/bottom edges? 4 coordinates (2 horizontal, 2 vertical lines) are enough.

Tried to flip, transpose, etc. My mind is gonna blow :/.

[EDIT]: Image is binary. Figure is represented by 1's.

example figure

Upvotes: 1

Views: 52

Answers (2)

Ander Biguri
Ander Biguri

Reputation: 35525

You can try to get its bounding box with the regionprops() function.

regionprops(img,'BoundingBox')

The result is (x,y) upper left coordinates x_width, y_width, size of the box.

I get [45.5000000000000 45.5000000000000 174 107] in your image.

Upvotes: 3

soupault
soupault

Reputation: 6510

The shortest solution i made:

% I - image array
V = sum(I,2);
edge_top = find(V,1,'first');
edge_bot = find(V,1,'last');
H = sum(I,1);
edge_left = find(H,1,'first');
edge_right = find(H,1,'last');

Upvotes: 0

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