hailo_overlay.rst

Hailo Overlay

Overview

HailoOverlay is a drawing element that can draw postprocessed results on an incoming video frame. This element supports the following results:

• Detection - Draws the rectengle over the frame, with the label and confidence (rounded).
• Classification - Draws a classification over the frame, at the top left corner of the frame.
• Landmarks - Draws a set of points on the given frame at the wanted coordintates.
• Tiles - Can draw tiles as a thin rectengle.

Parameters

As a member of the GstBaseTransform hierarchy, the hailooverlay element supports qos (Quality of Service). Although qos typically tries to guarantee some level of performance, it can lead to frames dropping. For this reason it is advised to always set qos=false to avoid either tensors being dropped or not drawn.

Hierarchy

GObject
 +----GInitiallyUnowned
       +----GstObject
             +----GstElement
                   +----GstBaseTransform
                         +----GstHailoOverlay

Pad Templates:
  SINK template: 'sink'
    Availability: Always
    Capabilities:
      video/x-raw
                 format: { (string)RGB }
                  width: [ 1, 2147483647 ]
                 height: [ 1, 2147483647 ]
              framerate: [ 0/1, 2147483647/1 ]

  SRC template: 'src'
    Availability: Always
    Capabilities:
      video/x-raw
                 format: { (string)RGB }
                  width: [ 1, 2147483647 ]
                 height: [ 1, 2147483647 ]
              framerate: [ 0/1, 2147483647/1 ]

Element has no clocking capabilities.
Element has no URI handling capabilities.

Pads:
  SINK: 'sink'
    Pad Template: 'sink'
  SRC: 'src'
    Pad Template: 'src'

Element Properties:
  name                : The name of the object
                        flags: readable, writable
                        String. Default: "hailooverlay0"
  parent              : The parent of the object
                        flags: readable, writable
                        Object of type "GstObject"
  qos                 : Handle Quality-of-Service events
                        flags: readable, writable
                        Boolean. Default: false