Information processing apparatus, information processing system, computer-readable non-transitory storage medium having stored therein information processing program, and information processing method
An example information processing apparatus including an infrared light emitter capable of emitting infrared light and a camera capable of at least taking an infrared light image is provided. In the information processing apparatus, first, an image taken by use of the camera is obtained. A face detection process based on the image is repeatedly executed. Then, based on a result of the face detection process, emission of the infrared light is stopped and emission of the infrared light is resumed after a lapse of a predetermined time period.
1. An information processing apparatus including an infrared light emitter capable of emitting infrared light and a camera capable of at least taking an infrared light image, the information processing apparatus configured to:
control emission of the infrared light;
repeatedly obtain an image taken by use of the camera; and
repeatedly execute a face detection process based on the obtained image, wherein in the infrared light emission control, emission of the infrared light is stopped based on a result of the face detection process performed in the face detection, and emission of the infrared light is resumed after a lapse of a predetermined time period;
in the infrared light emission control, emission of the infrared light is stopped when face detection with the infrared light emitted has been a failure, and emission of the infrared light is resumed after a lapse of the predetermined time period; and
in the infrared light emission control, stopping emission of the infrared light when face detection with the infrared light emitted has been a failure and resuming the emission after a lapse of the predetermined time period are repeatedly executed, until the face detection succeeds, with the predetermined time period being gradually extended between repetitions.
2. The information processing apparatus according to claim 1 , wherein
in the infrared light emission control, emission of the infrared light is stopped when the number of consecutive failures of the face detection has become greater than a predetermined number, and emission of the infrared light is resumed after a lapse of the predetermined time period.
3. The information processing apparatus according to claim 1 , wherein in the infrared light emission control, as a result of the predetermined time period being extended between repetitions, when the predetermined time period has reached a predetermined value, the predetermined time period is not extended any longer and stopping emission of the infrared light and resuming the emission after a lapse of the predetermined time period are repeatedly executed.
4. The information processing apparatus according to claim 1 , wherein the information processing apparatus is further configured to detect a motion of the information processing apparatus itself, and
in the infrared light emission control, while stopping emission of the infrared light and resuming the emission after a lapse of the predetermined time period are repeatedly executed between repetitions, when an output value of the detected motion is greater than or equal to a predetermined threshold, emission of the infrared light is resumed regardless whether the predetermined time period has elapsed.
5. The information processing apparatus according to claim 1 , wherein
the information processing apparatus is a hand-held information processing apparatus.
6. The information processing apparatus according to claim 1 , wherein
the information processing apparatus is operable on a battery.
7. A computer-readable non-transitory storage medium having stored therein an information processing program to be executed by a computer of an information processing apparatus including an infrared light emitter capable of emitting infrared light and a camera capable of at least taking an infrared light image, the information processing program causing the computer to:
control emission of the infrared light;
repeatedly obtain an image taken by use of the camera; and
repeatedly execute a face detection process based on the obtained image, wherein
in the infrared light emission control, emission of the infrared light is stopped based on a result of the face detection process performed in the face detection, and emission of the infrared light is resumed after a lapse of a predetermined time period;
in the infrared light emission control, emission of the infrared light is stopped when face detection with the infrared light emitted has been a failure, and emission of the infrared light is resumed after a lapse of the predetermined time period; and
in the infrared light emission control, stopping emission of the infrared light when face detection with the infrared light emitted has been a failure and resuming the emission after a lapse of the predetermined time period are repeatedly executed, until the face detection succeeds, with the predetermined time period being gradually extended between repetitions.
8. An information processing method for controlling an information processing apparatus including an infrared light emitter capable of emitting infrared light and a camera capable of at least taking an infrared light image, the method comprising:
controlling the infrared light emitter so as to control emission of the infrared light;
repeatedly obtaining an image taken from the camera; and
repeatedly executing a face detection process using at least one computer processor based on the obtained image; wherein
in the infrared light emission control, emission of the infrared light is stopped based on a result of the face detection process performed in the face detection, and emission of the infrared light is resumed after a lapse of a predetermined time period;
in the infrared light emission control, emission of the infrared light is stopped when face detection with the infrared light emitted has been a failure, and emission of the infrared light is resumed after a lapse of the predetermined time period; and
in the infrared light emission control, stopping emission of the infrared light when face detection with the infrared light emitted has been a failure and resuming the emission after a lapse of the predetermined time period are repeatedly executed, until the face detection succeeds, with the predetermined time period being gradually extended between repetitions.