Abstract: A method of optical heart rate sensing includes receiving a motion frequency from a motion sensor and receiving an optical signal from an optical sensor. The motion frequency is then filtered from the optical signal, and an estimated heart rate frequency is determined based on the filtered optical signal. A heart rate is reported that is based on the motion frequency, but not based on the estimated heart rate frequency, when a local neighbor magnitude ratio of the estimated heart rate frequency is below a confidence threshold.

Abstract: A method for an optical heart rate sensor comprises recognizing a minimum amount of motion of the optical heart rate sensor during a testing duration and recognizing an average amount of motion of the optical heart rate sensor during the testing duration. The motion of the optical heart rate sensor is compensated for if the minimum amount of motion during the testing duration exceeds a first threshold, even if the average amount of motion during the testing duration is less than a second threshold, greater than the first threshold. The motion of the optical heart rate sensor is not compensated for if the minimum amount of motion during the testing duration is below the first threshold, even if the average amount of motion during the testing duration is greater than the second threshold.

Abstract: An optical heart rate sensor includes an optical source configured to illuminate one or more blood vessels through a user's skin, an optical sensor configured to measure reflected illumination from the blood vessels, and one or more energy storage cells. A controller operates the optical source and optical sensor at a first rate of energy consumption during a first condition, and operates the optical source and optical sensor at a second rate of energy consumption during a second condition.

Abstract: Systems and methods for estimating lifestyle metrics with a wearable electronic device are disclosed herein. One disclosed system may include the wearable electronic device comprising a processor and a sensor system providing inputs to the processor. The sensor system may include a high power sensor and a low power sensor. The processor may operate in a high power mode in which both sensors are operational and a low power mode in which the high power sensor is not operational. In the high power mode, the processor may compute a lifestyle metric about a user for a first time period based on first data from the high power sensor. In the low power mode, the processor may compute the lifestyle metric for a second time period based on second data from the low power sensor and the first data and/or a derivative of the first data.

Abstract: An optical heart rate sensor stores data indicating the timing of heart beats in a first-in-first-out rolling buffer. During a first condition, new data is added to the rolling buffer and adjusted such that a duration preceding a newly detected heart beat is closer to an average duration between each pair of consecutive heart beats stored in the rolling buffer if the duration preceding the newly detected heart beat differs from the average duration by more than a duration threshold. The rolling buffer is cleared when a number of data adjustments over a predetermined time period exceeds a counting threshold. The rolling buffer is then repopulated such that the duration between each pair of consecutive heart beats is equal to a most recent duration between consecutive heart beats that did not differ from the average duration by more than the duration threshold.

Abstract: A sequence of motion images, captured by an image capture system such as a digital camera, are converted into a sequence of modified motion images providing the appearance of motion images captured by the same capture system and subsequently rendered in a post-processing stage to simulate a particular look. The method involves capturing a sequence of motion images using a full resolution image sensor system, then recording the full resolution unprocessed image signals, and providing the recorded full resolution unprocessed image signals to the post-production process, where the images will be subsequently rendered in a post-processing stage to simulate a particular look. Meanwhile, one or more image processing algorithms are applied in the image capture system to the unprocessed image signals to simulate the particular look rendered in the post-processing stage, and the simulated image signals are displayed as a sequence of modified images.