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//Image annotation
Polyline Annotation
Polyline annotation is a technique used in computer vision, image processing, and machine learning to label and annotate objects or features within images using connected sequences of line segments. Unlike polygon annotation, which encloses regions of interest with closed shapes, polyline annotation delineates objects or structures with open-ended lines defined by a series of vertices. Polyline annotation is particularly useful for annotating linear features, boundaries, and contours within images.
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APPLICATIONS OF POLYLINE ANNOTATION
Annotation Process
In polyline annotation, annotators manually or semi-automatically draw lines or polylines on the image to outline and annotate objects or features of interest. These polylines consist of a series of connected line segments defined by endpoints or vertices, allowing for the precise delineation of linear structures and contours within the image.


Boundary and Contour Labeling
Polyline annotation is commonly used to label boundaries, contours, and outlines of objects within images. This includes annotating the outlines of objects such as buildings, roads, rivers, boundaries, and regions of interest in aerial or satellite imagery, geological surveys, and cartography.
Object Localization and Segmentation
Polyline annotation enables precise object localization and segmentation by delineating the boundaries of objects or regions of interest within images. By tracing the contours of objects with polylines, annotators can accurately define the spatial extent and shape of objects for tasks such as object detection, recognition, and segmentation.


Road and Lane Annotation
In applications such as autonomous driving, transportation planning, and navigation systems, polyline annotation is used to annotate roads, lanes, and traffic markings within images. By tracing the centerlines, lane markings, and road edges with polylines, annotators can provide detailed information about road geometry and infrastructure for autonomous vehicle navigation and traffic analysis.
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USE CASES FOR POLYLINE ANNOTATION
RETAIL

ROBOTICS

AGRICULTURE

INSURANCE

HEALTHCARE

SECURITY & SURVEILLANCE

SELF-DRIVING

LOGISTICS

AUTONOMOUS FLYING

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