# Object Class Recognition

Object class recognition finds objects that belong to pre-defined classes, when they appear in media. For example, if you are processing video captured by a CCTV camera, you could train Media Server to return the locations of pedestrians, cyclists, and cars that appear in the video.

Configuration Parameter | Description
--- | ---
ClassFilters | A comma-separated list of identifiers that specifies the object classes to recognize.
DetectionThreshold | The minimum confidence score necessary for Media Server to output a result.
FullAnalysisRate | Specifies how frequently to recognize new objects, so that you can optimize performance for your hardware.
Input | The track to analyze.
MaxImageSize | The maximum image size for analysis.
MaxInputQueueLength | Can be used to place a limit on latency.
NumParallel | The maximum number of video frames to analyze simultaneously.
Recognizer | The recognizer to use for recognizing objects.
Region | The region of the frame to restrict processing to.
RegionUnit | (Deprecated) The units to use when setting the Region parameter.
RestrictToInputRegion | (Deprecated) Specifies whether to analyze a region of the input image or video frame that is specified in the input record, instead of the entire image.
SampleInterval | The interval at which frames are selected to be analyzed.
SegmentDuration | The maximum duration of a record in the `SegmentedResult` or `SegmentedResultWithSource` track.
SurveillanceRecognizer | The recognizer to use (to run object class recognition with a surveillance license).
SyncDatabase | Specifies whether to synchronize with the training database before starting analysis.
Type | The analysis engine to use. Set this parameter to `ObjectClassRecognition`.

## Output Tracks

Output track | Description | Output1This column indicates whether the information contained in the track is included by default in the output created by an output task (when you don't set the Input parameter for the output task).
--- | --- | ---
`Data` | Contains one record, describing the analysis results, per recognized object, per video frame. | No
`DataWithSource` | The same as the `Data` track, but each record also includes the source frame. | No
`Result` | Contains one record, describing the analysis results, for each recognized object. When the same object appears in many consecutive frames, Media Server produces a single result. | Yes
`ResultWithSource` | The same as the `Result` track, but each record also includes the best source frame. | No
`SegmentedResult` | (Available only when processing video). The same as the `Result` track, except the duration of each record is limited by the parameter SegmentDuration. If a result exceeds the specified duration, Media Server begins a new record with the same ID. | Yes
`SegmentedResultWithSource` | (Available only when processing video). The same as the `ResultWithSource` track, except the duration of each record is limited by the parameter SegmentDuration. If a result exceeds the specified duration, Media Server begins a new record with the same ID. | No
`Start` | The same as the `Data` track, except it contains only the first record of each event. | No
`End` | The same as the `Data` track, except it contains only the last record of each event. | No

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