METHODS AND APPARATUS FOR PERFORMING EXPOSURE ESTIMATION USING A TIME-OF-FLIGHT SENSOR

摘要

This application relates to capturing an image of a target object using information from a time-of-flight sensor. In one aspect, a method may include a time-of-flight (TOF) system configured to emit light and sense a reflection of the emitted light and may determine a return energy based on the reflection of the emitted light. The method may measure a time between when the light is emitted and when the reflection is sensed and may determine a distance between the target object and the TOF system based on that time. The method may also identify a reflectance of the target object based on the return energy and may determine an exposure level based on a distance between the target object and a reflectance of the target object.

主权项

1. An imaging apparatus, comprising:
a time-of-flight (TOF) system comprising:
an emitter configured to emit a light signal, anda sensing system configured to sense a reflection of the emitted light signal off of a target object, the TOF system configured to determine a return energy based on the reflection of the emitted light signal; a clock coupled to the TOF system, the clock configured to measure a time between when the light signal is emitted and when the emitted light signal is sensed by the sensing system; and a processor in communication with the TOF system and the clock, the processor configured to:
determine a distance between the target object and the TOF system based on the measured time,identify a reflectance of the target object based on the return energy of the emitted light signal, anddetermine an exposure level based on the distance to the target object and the reflectance of the target object.