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35 lines
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35 lines
1.3 KiB
Markdown
---
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title: 'Annotation with rectangles'
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linkTitle: 'Annotation with rectangles'
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weight: 7
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---
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To learn more about annotation using a rectangle, see the sections:
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- [Shape mode (basics)](/docs/manual/basics/shape-mode-basics/)
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- [Track mode (basics)](/docs/manual/basics/track-mode-basics/)
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- [Shape mode (advanced)](/docs/manual/advanced/shape-mode-advanced/)
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- [Track mode (advanced)](/docs/manual/advanced/track-mode-advanced/)
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## Rotation rectangle
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To rotate the rectangle, pull on the `rotation point`. Rotation is done around the center of the rectangle.
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To rotate at a fixed angle (multiple of 15 degrees),
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hold `shift`. In the process of rotation, you can see the angle of rotation.
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## Annotation with rectangle by 4 points
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It is an efficient method of bounding box annotation, proposed
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[here](https://arxiv.org/pdf/1708.02750.pdf).
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Before starting, you need to make sure that the drawing method by 4 points is selected.
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Press `Shape` or `Track` for entering drawing mode. Click on four extreme points:
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the top, bottom, left- and right-most physical points on the object.
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Drawing will be automatically completed right after clicking the fourth point.
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Press `Esc` to cancel editing.
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