Everything you Need to Know About Image Annotation
These are the annotation types that you can use on Labellerr.
- Bounding Box
- Polygon
- Line
- Segmentation - Segment Anything
- Landmark/Keypoint
- Ellipse
Only the Objects selected while making a project would be visible. More can be added from the settings
Bounding Box
Bounding box is a rectangular box used to highlight the location of an object. One of the most common types of annotation, generally used for object localization or detection.
For more, check out this video tutorial
Polygon
Polygon annotation is a computer vision technique that outlines objects by connecting a series of points to form a polygon. This accurately captures the true shape and boundaries of objects, making it ideal for handling complex or irregular shapes.
For more, check out this video tutorial
Drag Polygon
User can drag the cursor to draw the pixel perfect annotation on an object. Press ‘Shift’ key and then drag the cursor towards the boundaries of an object.
Press ‘N’ to close the polygon or simply drag the cursor to starting point.
Line
Line annotation is mainly used to create lines across the image. Its basic use is road detection in self-driving vehicles.
Segmentation - Segment Anything
Segmentation enables pixel-wise annotation. All the pixels highlighted are assigned to a particular class. This type of annotation is best for environments with complex structures, e.g., Self-driving vehicle AI. SAM is a new AI model from Meta AI that can “cut out” any object, in any image, with a single click.
For more, check out this video tutorial
Landmark/Keypoint
Landmark and Key-point annotation is used in shape variation and small object detection. It works by creating dots across an image, usually used for the detection of facial features, gestures, emotions, poses and body part distinction.
Ellipse
The Ellipse annotation is useful for the annotation of circular objects.
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