Motivation
ipyannotator currently support single object annotation with bounding boxes (bbox). However often a bounding box provides only
a very coarse localization of an instance. For tasks such as instance segmentation a sequence of (x, y) points is used to
define a polygon per object.
Polygon Annotation Widget
As a step towards supporting polygon annotations we need a widget that can display and accept user input for polygons.
Since polygon annotation can be seen as a generalization of bbox annotation a natural first step would be to use the
bbox canvas notebook 01_bbox_canvas.ipynb as blue print for a polygon widget.
Suggested steps.
- Write code
draw_polygon(...) to render a predefined polygon on an image.
- Create a class
class PolygoneCanvas(HBox, traitlets.HasTraits) that can capture user input to define a polygon.
Motivation
ipyannotator currently support single object annotation with bounding boxes (bbox). However often a bounding box provides only
a very coarse localization of an instance. For tasks such as instance segmentation a sequence of (x, y) points is used to
define a polygon per object.
Polygon Annotation Widget
As a step towards supporting polygon annotations we need a widget that can display and accept user input for polygons.
Since polygon annotation can be seen as a generalization of bbox annotation a natural first step would be to use the
bbox canvas notebook
01_bbox_canvas.ipynbas blue print for a polygon widget.Suggested steps.
draw_polygon(...)to render a predefined polygon on an image.class PolygoneCanvas(HBox, traitlets.HasTraits)that can capture user input to define a polygon.