Driver monitoring apparatus and method for controlling illuminator thereof
A driver monitoring apparatus includes: a driver monitoring camera configured to obtain an image of a user while adjusting an irradiation range of irradiated light; and a driver state sensor configured to request the driver monitoring camera to adjust the irradiation range depending on an operation mode. The driver monitoring apparatus is capable of improving reliability in monitoring a driver state by controlling an irradiation range and intensity of lighting depending on an operation mode and an external environment at the time of monitoring the driver state to irradiate light to only a region of interest.
1. A driver monitoring apparatus comprising:
a driver monitoring camera configured to obtain an image of a user while adjusting an irradiation range of irradiated light; and
a driver state sensor configured to request the driver monitoring camera to adjust the irradiation range to be either a face region or an eye region depending on whether an operation mode of the driver monitoring apparatus is either a face tracking mode or an eye tracking mode,
wherein, when a light reflecting point is detected in the obtained image of the user at a time of irradiating light to the eye region, the driver monitoring camera decreases the irradiation range to a predetermined ratio based on position information of a pupil.
2. The driver monitoring apparatus according to claim 1 , wherein the driver monitoring camera includes:
an image sensor configured to obtain the image of the user;
an illuminator configured to emit the irradiated light and variably adjust the irradiation range; and
a controller configured to control operations of the image sensor and the illuminator.
3. The driver monitoring apparatus according to claim 2 , wherein the illuminator includes:
a light source configured to emit light;
a lens configured to collect the light emitted from the light source; and
a driving unit configured to adjust a position of at least one of the light source and the lens.
4. The driver monitoring apparatus according to claim 3 , wherein the illuminator further includes a reflector configured to reflect transmitted light passing through the lens.
5. The driver monitoring apparatus according to claim 2 , wherein the illuminator includes:
a light source configured to emit light; and
a reflector configured to reflect the light emitted from the light source.
6. The driver monitoring apparatus according to claim 2 , wherein the illuminator is implemented by an array in which one or more light sources are arrayed.
7. The driver monitoring apparatus according to claim 6 , wherein the illuminator selectively turns on the one or more light sources.
8. The driver monitoring apparatus according to claim 1 , wherein the driver state sensor is configured to:
extract face information from the image of the user;
extract eye information from the image of the user; and
decide a state of a driver using the face information and the eye information.
9. The driver monitoring apparatus according to claim 1 , wherein the driver monitoring camera adjusts intensity of the irradiated light depending on the operation mode and an external environment.