Information processing apparatus and control method
An information processing apparatus includes a processor that processes the image data of the image stored in a memory in order to detect a face area with a face captured therein and an orientation of the face from the image, and controls the screen brightness of a display unit based on the orientation of the face detected by the processing. When the detected face orientation falls within a preset first angle range, the processor determines that the face orientation is a first orientation, and even when the detected face orientation is out of the first angle range, the processor determines that the face orientation is the first orientation depending on the amount of change in the detected orientation of the face changing in a direction of the first orientation.
1. An information processing apparatus comprising:
a memory that stores image data of an image captured by an imaging unit; and
a processor that:
processes the image data stored in the memory to detect a face orientation of a face captured in the image data, and
controls a screen brightness of a display unit based on the face orientation, wherein
the processor sets the screen brightness to a first brightness upon detecting that the face orientation is within a first angle range with respect to the imaging unit, wherein
the first angle range is defined by a first angle threshold and covers a range from zero degree to a predetermine plus or minus angle, and
the zero degree is defined as the face orientation facing a predetermined direction based on a location of the imaging unit,
the processor sets the screen brightness to a second brightness upon detecting that the face orientation is out of the first angle range, wherein
the second brightness is lower than the first brightness, and
the processor sets the screen brightness to the first brightness, regardless of whether face orientation is within the first angle range, upon detecting that the face orientation changes from a first angle to a second angle within a predetermined time period, wherein
the second angle is closer to the first angle threshold than is the first angle.
2. The information processing apparatus according to claim 1 , wherein upon detecting that the face orientation changes by a predetermined angle or more from the face orientation out of the first angle range toward the face orientation within the first angle range, the processor determines that the face orientation is within the first angle range even though the face orientation is being out of the first angle range.
3. The information processing apparatus according to claim 2 , wherein upon detecting that the face orientation changes by the predetermined angle or more from the face orientation out of the first angle range toward the first orientation within the first angle range, within a predetermined time, the processor determines that the face orientation is within the first angle range even though the face orientation is being out of the first angle range.
4. The information processing apparatus according to claim 1 , wherein the processor determines, out of the first angle range, within a second angle range wider than the first angle range, whether the face orientation is within the first angle range based on an amount of change of the face orientation toward the face orientation within the first angle range.
5. The information processing apparatus according to claim 4 , wherein
the processor reduces a detection cycle in case of detecting the face orientation within the first angle range to less than a detection cycle in case of detecting the face orientation out of the first angle range but within the second angle range.
6. The information processing apparatus according to claim 1 , wherein upon detecting that the face orientation changes from within the first angle range to out of the first angle range, the processor reduces the screen brightness.
7. The information processing apparatus according to claim 1 , wherein upon determining that the face orientation is within the first angle range in such a state that the screen brightness is reduced, the processor restores the screen brightness before being reduced.
8. The information processing apparatus according to claim 1 , wherein the imaging unit outputs the image data of the image obtained by imaging a predetermined angle of view in a direction to face a screen of the display unit.
9. A control method for an information processing apparatus including: a memory that stores image data of an image captured by an imaging unit; and a processor that processes the image data stored in the memory, the control method comprising:
processing the image data stored in the memory to detect a face orientation of a face captured in the image data; and
controlling a screen brightness of a display unit based on the face orientation, wherein
the controlling includes:
setting the screen brightness to a first brightness upon detecting that the face orientation is within a first angle range with respect to the imaging unit, wherein
the first angle range is defined by a first angle threshold and covers a range from zero degree to a predetermine plus or minus angle, and
the zero degree is defined as the face orientation facing a predetermined direction based on a location of the imaging unit;
setting the screen brightness to a second brightness upon detecting that the face orientation is out of the first angle range, wherein
the second brightness is lower than the first brightness; and
setting the screen brightness to the first brightness, regardless of whether the face orientation is within the first angle range, upon detecting that the face orientation changes from a first angle to a second angle within a predetermined time period, wherein
the second angle is closer to the first angle threshold than is the first angle.