Media Server 25.4
Media Server Help

# Projection

A projection matrix that describes the perspective from which the camera views the scene.

Using this information, Media Server is able to calculate real-world 3D coordinates for objects in the scene. Object class recognition and vehicle model recognition can reduce the number of false positive results by checking whether the size of an object or vehicle, in pixels, corresponds to its real-world size. Media Server takes into account the position of the object in the scene and its distance from the camera.

The object class recognition and vehicle model recognition engines can determine the projection matrix automatically if you specify the field of view of the camera and the expected size of each object class or vehicle model.

This parameter allows you to specify the projection matrix manually. If you want to set this parameter, OpenText recommends using the configuration builder in the Media Server graphical user interface but you can obtain the matrix from the FindProjection action if you prefer.

For more information about using perspective in media analysis, see Use Perspective in Media Analysis.

Type: | Custom
Default: |
Required: | No
Configuration Section: | Session
Example: | `Projection=12.0269 0.041904 -12020.4 -0.652671 -18.9201 15430.2 0 0 0 0 1 426.708`
See Also: |

Copyright 2025 Open Text
Version 25.4 | Last updated October 2025

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Product: Knowledge Discovery Media Server 25.4

Topic Title: Projection