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# 2D Object Recognition

HPE Media Server can recognize 2-D objects in images and video, even when they are subject to similarity or perspective transformation. However, HPE Media Server expects the object to appear on a flat, rigid surface.

The following table provides some examples of transformations that are supported and are not supported.

Transformation | Example | Supported?
--- | --- | ---
Original object |  | ✓
Scaling |  | ✓
Rotation |  | ✓
Perspective distortion or skew (horizontal or vertical only) |  | ✓
Perspective distortion or skew (both horizontal and vertical) |  | ✓
2-D object on a surface that is not flat |  | ✗

Tip: HPE Media Server does not support the recognition of 2-D objects on surfaces that are not flat. However, acceptable accuracy is achievable if you train HPE Media Server using images of the object on the curved surface, rather than images of the object on a flat surface (so that the training is representative of the images you want to analyze).

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