How are bounding boxes defined in MATLAB?
3 ビュー (過去 30 日間)
古いコメントを表示
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.
![Clipboard01.jpg](https://www.mathworks.com/matlabcentral/answers/uploaded_files/254550/Clipboard01.jpeg)
4 件のコメント
Walter Roberson
2019 年 12 月 31 日
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 年 12 月 31 日
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,:)
回答 (0 件)
参考
カテゴリ
Help Center および File Exchange で Image and Video Ground Truth Labeling についてさらに検索
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!