CameraControl.exposureCompensation

Summary

The exposureCompensation property value is a number used to compensate the camera exposure.

This property is read-only; to change the exposure, you need to call the CameraControl.setExposureCompensation() method.

Acceptable values for this property must range from the value of the CameraCapabilities.minExposureCompensation property to the value of the CameraCapabilities.maxExposureCompensation property in steps of the CameraCapabilities.stepExposureCompensation property.

Invalid values are rounded to the nearest valid value.

Syntax

var exposure = instanceOfCameraControl.exposureCompensation

Value

Return a number representing the current exposure compensation.

Example

var options = {
  camera: navigator.mozCameras.getListOfCameras()[0]
};
 
function onSuccess( camera ) {
  var exposure = camera.exposureCompensation;

  console.log('Exposure compensation: ' + exposure);
};

navigator.mozCameras.getCamera(options, onSuccess)

Specification

Not part of any specification; however, this API should be removed when the WebRTC Capture and Stream API has been implemented.

See also

• CameraCapabilities
• CameraControl
• CameraControl.setExposureCompensation()