How are bounding boxes defined in MATLAB?

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Swapnil Sayan Saha 2019-12-15

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评论： Walter Roberson 2019-12-31

I extracted bounding box positions from MATLAB's video labeller app. However, I can't seem to understand how the position is formatted. The initial bounding box position shows four numbers, while the rest show 8 numbers.

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Walter Roberson 2019-12-31

x and y are used in Cartesian coordinate sense. x is distance along the horizontal axes (left/right) starting from the lower left corner, and y is distance along the vertical (up/down) axes starting from the lower left corner. x corresponds to columns (not rows) and y corresponds to rows (not columns) so you need to reverse x and y if you want to index into an array.

Walter Roberson 2019-12-31

Side note: imcrop has an off-by-one in what it crops. If for example you give it the bounding box 1 1 5 5 then instead including only YourMatrix(1:5,1:5,:) it extracts YourMatrix(1:6,1:6,:)

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