Optical signal-quality control with accelerometer-induced signals

A wearable computing device, comprising:

• a display device;
• an inertial measurement unit (IMU);
• one or more optical sensors comprising one or more light emitters;
• and
• one or more processors configured to:
• obtain, via the one or more optical sensors, optical sensor data associated with a user of the wearable computing device;
• obtain, via the IMU, movement data characterizing motion of the user;
• process the optical sensor data and the movement data to identify a motion-induced spurious component of the optical sensor data;
• and
• modify an operation mode of the wearable computing device based on the motion-induced spurious component of the optical sensor data by:
• determining a current transfer ratio (CTR) for the user based on a signal-to-motion ratio (SMR) for the optical sensor data, the SMR being a ratio between the optical sensor data and the movement data at a particular frequency corresponding to a frequency of the motion-induced spurious component;
• determining a target signal strength for the one or more optical sensors based on the CTR;
• and
• configuring the one or more light emitters of the one or more optical sensors to emit adjusted optical signals having the target signal strength.

A computing system, comprising:

• an inertial measurement unit (IMU);
• one or more optical sensors comprising one or more light emitters;
• one or more processors;
• and
• one or more computer-readable media that collectively store instructions that, when executed by the one or more processors, cause the computing system to perform operations, the operations comprising:
• obtaining, via the one or more optical sensors, optical sensor data associated with a user of the computing system;
• obtaining, by the IMU, movement data characterizing motion of the user;
• processing the optical sensor data and the movement data to identify a motion-induced spurious component of the optical sensor data;
• and
• modifying an operation mode of a wearable computing device of the computing system based on the motion-induced spurious component of the optical sensor data by:
• determining a current transfer ratio (CTR) for the user based on a signal-to-motion ratio (SMR) for the optical sensor data, the SMR being a ratio between the optical sensor data and the movement data at a particular frequency corresponding to a frequency of the motion-induced spurious component;
• determining a target signal strength for the one or more optical sensors based on the CTR;
• and
• configuring the one or more light emitters of the one or more optical sensors to emit adjusted optical signals having the target signal strength.