# US 2024/0201780 A1 · Information processing apparatus and control method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0201780 A1 - Document ID: US20240201780A1 - Status: Published application - Kind: A1 - Application number: 18/495,007 - Filed: 2023-10-26 - Published: 2024-06-20 - Earliest claimed: 2022-12-14 - Assignees: Lenovo (Singapore) Pte. Ltd. - Applicants: Lenovo (Singapore) Pte. Ltd. - Inventors: Masashi Nishio; Yuji Wada - Web page: https://patentgrep.com/patent/US20240201780A1 ## CPC - G06F 3/012: {Head tracking input arrangements} - G06F 1/3231: Monitoring the presence, absence or movement of users - G06F 1/3265: {Power saving in display device} - G06V 10/141: Control of illumination - G06V 40/161: {Detection; Localisation; Normalisation} - G06V 10/17: {using hand-held instruments} - G09G 5/00: Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators (image data processing or generation, in general G06T) - G09G 2320/0252: Improving the response speed - G09G 2320/0626: for control of overall brightness - G09G 2330/023: using energy recovery or conservation - G09G 2354/00: Aspects of interface with display user - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract 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. ## Claims ### Claim 1 An information processing apparatus comprising: a memory which temporarily stores image data of an image captured by an imaging unit; and a processor which processes the image data stored in the memory, the processor performing face detection processing to process the image data of the image stored in the memory in order to detect a face area with a face captured therein and an orientation of the face from the image, and brightness control processing to control screen brightness of a display unit based on the orientation of the face detected by the face detection processing, wherein in the face detection 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 of the detected orientation of the face changing in a direction of the first orientation. ### Claim 2 (depends on 1) The information processing apparatus according to claim 1, wherein in the face detection processing, when the detected face orientation changes by a predetermined angle or more from a second orientation outside the first angle range in the direction of the first orientation even though the detected face orientation is out of the first angle range, the processor determines that the face orientation is the first orientation. ### Claim 3 (depends on 2) The information processing apparatus according to claim 2, wherein in the face detection processing, when the detected face orientation changes by the predetermined angle or more from the second orientation in the direction of the first orientation within a predetermined time even though the detected face orientation is out of the first angle range, the processor determines that the face orientation is the first orientation. ### Claim 4 (depends on 1) The information processing apparatus according to claim 1, wherein in the face detection processing, the processor performs processing to determine whether or not the face orientation is the first orientation within a second angle range wider than the first angle range, and based on the amount of change of the face orientation in the direction of the first orientation outside the first angle range within the second angle range, the processor performs the processing to determine whether or not the face orientation is the first orientation. ### Claim 5 (depends on 1) The information processing apparatus according to claim 1, wherein in the face detection processing, the processor reduces a detection cycle when the detected face orientation is within the first angle range to less than the detection cycle when the detected face orientation is out of the first angle range. ### Claim 6 (depends on 4) The information processing apparatus according to claim 4, wherein in the face detection processing, the processor reduces the detection cycle when the detected face orientation is within the first angle range to less than the detection cycle when the detected face orientation is out of the first angle range within the second angle range. ### Claim 7 (depends on 1) The information processing apparatus according to claim 1, wherein in the brightness control processing, when the face orientation detected by the face detection processing changes from within the first angle range to outside the first angle range, the processor reduces the screen brightness. ### Claim 8 (depends on 7) The information processing apparatus according to claim 7, wherein in the brightness control processing, when the face orientation detected by the face detection processing is determined to be the first orientation in such a state that the screen brightness is reduced, the processor restores the screen brightness before being reduced. ### Claim 9 (depends on 1) 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. ### Claim 10 A control method for an information processing apparatus including: a memory which temporarily stores image data of an image captured by an imaging unit; and a processor which processes the image data stored in the memory, the control method comprising: a face detection step of causing the processor to process the image data of the image stored in the memory in order to detect a face area with a face captured therein and an orientation of the face from the image; and a brightness control step of causing the processor to control screen brightness of a display unit based on the orientation of the face detected in the face detection step, wherein in the face detection step, when the detected face orientation falls within a preset first angle range, the face orientation is determined to be a first orientation, and even when the detected face orientation is out of the first angle range, the face orientation is determined to be the first orientation depending on the amount of change in the detected orientation of the face changing in a direction of the first orientation.