# US 12,192,642 B2 · Information processing system, information processing apparatus, information processing method and recording medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,192,642 B2 - Document ID: US12192642B2 - Status: Granted - Kind: B2 - Application number: 17/775,969 - Filed: 2021-09-30 - Published: 2024-05-09 - Granted: 2025-01-07 - Earliest claimed: 2021-09-30 - Assignees: NEC Corporation - Applicants: NEC Corporation - Inventors: Masato Tsukada - Web page: https://patentgrep.com/patent/US12192642B2 ## CPC - H04N 23/71: Circuitry for evaluating the brightness variation - G06T 7/20: Analysis of motion (motion estimation for coding, decoding, compressing or decompressing digital video signals H04N19/43, H04N19/51) - G06T 7/90: Determination of colour characteristics - H04N 23/611: where the recognised objects include parts of the human body - H04N 23/72: Combination of two or more compensation controls - H04N 23/73: by influencing the exposure time - H04N 23/74: by influencing the scene brightness using illuminating means - G06T 2207/10024: Color image - G06T 2207/30196: Human being; Person - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G06T: IMAGE DATA PROCESSING OR GENERATION, IN GENERAL ## Abstract An information processing system (10) comprises: an acquiring means (110) for acquiring skin color information which is information relating to skin color of a target; an estimating means (120) for estimating luminance information of skin of the target on the basis of the skin color information; and a control means (130) for controlling at least one of camera parameter relating to exposure and illumination (19) when imaging the target on the basis of the luminance information. According to such the information processing system, it is possible to image a target with an appropriate condition. ## Claims ### Claim 1 An information processing system comprising: at least one memory storing instructions; and at least one processor configured to execute the instructions to: acquire skin color information relating to skin color of a target; store a reflectance model for calculating reflectance of skin of the target from the estimate luminance information of the skin of the target based on the skin color information, based on the reflectance of the skin of the target calculated by using the reflectance model; and control at least one of camera parameter relating to exposure and illumination when imaging the target on the basis of the luminance information. ### Claim 2 (depends on 1) The information processing system according to claim 1, wherein the at least one processor is configured to execute the instructions to control the at least one of the camera parameter and the illumination so that the luminance information of the skin of the target is between a first threshold and a second threshold. ### Claim 3 (depends on 2) The information processing system according to claim 2, wherein the at least one processor is configured to execute the instructions to: detect a movement amount of the target; and control the at least one of the camera parameter and the illumination based on the luminance information and the movement amount. ### Claim 4 (depends on 2) The information processing system according to claim 2, wherein when the target is imaged a plurality of times, and the at least one processor is configured to execute the instructions to control the at least one of the camera parameter and the illumination each time the target is imaged. ### Claim 5 (depends on 1) The information processing system according to claim 1, wherein the at least one processor is configured to execute the instructions to: detect a movement amount of the target; and control the at least one of the camera parameter and the illumination based on the luminance information and the movement amount. ### Claim 6 (depends on 5) The information processing system according to claim 5, wherein when the target is imaged a plurality of times, and the at least one processor is configured to execute the instructions to control the at least one of the camera parameter and the illumination each time the target is imaged. ### Claim 7 (depends on 1) The information processing system according to claim 1, wherein when the target is imaged a plurality of times, and the at least one processor is configured to execute the instructions to control the at least one of the camera parameter and the illumination each time the target is imaged. ### Claim 8 (depends on 7) The information processing system according to claim 7, wherein the at least one processor is configured to execute the instructions to perform a first control, in which an exposure time is shortened and the illumination is brightened, each time the target is imaged, or a second control, in which the exposure time is lengthened and the illumination is darkened, each time the target is imaged, based on the luminance information. ### Claim 9 (depends on 1) The information processing system according to claim 1, wherein when the target is imaged a plurality of times, and the at least one processor is configured to execute the instructions to control the at least one of the camera parameter and the illumination each time the target is imaged. ### Claim 10 An information processing apparatus comprising: at least one memory storing instructions; and at least one processor configured to execute the instructions to: store a reflectance model for calculating reflectance of skin of the target from the estimate luminance information of the skin of the target based on the skin color information, based on the reflectance of the skin of the target calculated by using the reflectance model; and control at least one of camera parameter relating to exposure and illumination when imaging the target on the basis of the luminance information. ### Claim 11 An information processing method performed by at least one computer and comprising: acquiring skin color information relating to skin color of a target; storing a reflectance model for calculating reflectance of skin of the target from the estimating luminance information of the skin of the target based on the skin color information, based on the reflectance of the skin of the target calculated by using the reflectance model; and controlling at least one of camera parameter relating to exposure and illumination when imaging the target on the basis of the luminance information.