# CoverageData

The CoverageData message provides real-time feedback on the visual feature coverage across the stereo field of view during the
[Dynamic Calibration](https://docs.luxonis.com/software-v3/depthai/depthai-components/host_nodes/dynamic_calibration.md) process.
It quantifies how well the current scene supports calibration — i.e., whether the system has enough diverse and spatially
distributed visual features to perform an accurate recalibration.

It is a diagnostic data structure that helps ensure the recalibration is based on reliable input. Adequate coverage directly
influences calibration accuracy and confidence. `CoverageData` message is received via `coverageOutput` when an image is loaded
either manually (with `LoadImage` command) or during continuous calibration (after running `StartCalibration` command).

## Examples of functionality

 * [Reading Coverage Data
   Snippet](https://docs.luxonis.com/software-v3/depthai/depthai-components/host_nodes/dynamic_calibration.md)
 * [Calibration integration
   example](https://github.com/luxonis/depthai-core/blob/main/examples/python/DynamicCalibration/calibration_integration.py)

## Reference

### dai::CoverageData

Kind: struct

Coverage information for a single frame.

Contains 2D spatial coverage metrics used internally during dynamic calibration to measure how well the image area has been
populated.

#### CoverageData()

Kind: function

#### ~CoverageData()

Kind: function

#### void serialize(std::vector< std::uint8_t > & metadata, DatatypeEnum & datatype)

Kind: function

Serialize CoverageData to buffer.

#### DatatypeEnum getDatatype()

Kind: function

Get the datatype of this specific message.

return: DatatypeEnum

#### DEPTHAI_SERIALIZE(CoverageData, coveragePerCellA, coveragePerCellB, coveragePerCell, meanCoverage, dataAcquired, coverageAcquired)

Kind: function

### Need assistance?

Head over to [Discussion Forum](https://discuss.luxonis.com/) for technical support or any other questions you might have.