# CVAT Annotation Rule

## Annotation Target

Only annotate the upper half of the body.

## Annotation Rule

* Annotate **upper half of the person**, as tight as possible
  * Thanh's gut feeling: "It will loosen up after training"

* Bounding box rule
  * Bottom edge touches the straight belt/hip:
  
      ![Straight belt](http://192.168.0.101:8929/nvmnghia/cvat-annotation-rule/raw/master/straight%20belt.png)

  * Bottom edge touches the top point of the oblique belt/hip

      ![Oblique belt](http://192.168.0.101:8929/nvmnghia/cvat-annotation-rule/raw/c409536b319bff3e6c7bf69fc20404669cf85d84/oblique%20belt.png)

  * Height must be more than 1/8 of the frame's height

* Visibility rule
  * Head must be visible
  * The visible part of the upper half must be larger than 50% of the whole upper part
  * The person must not be too small
