Electronic device employing thermal sensor and image sensor

An electronic device, comprising:

• a bolometer, configured to acquire and output a two-dimensional thermal image, each pixel of the two-dimensional thermal image indicating a temperature value;
• an image sensor, configured to acquire and output image information;
• a display screen, wherein the bolometer and the image sensor are arranged adjacent to a side of the display screen, and adjacent to each other along the side of the display screen;
• and
• a processor, coupled with the bolometer and the image sensor to respectively receive the two-dimensional thermal image and the image information, and configured to perform an object recognition according to the image information,
• wherein
• before the bolometer is turned on, the processor is configured to perform the object recognition to recognize whether an object in the image information is a registered face image,
• in response to the object recognition not recognizing the object, the processor is configured to not turn on the bolometer,
• in response to the object recognition recognizing the object, the processor is configured to turn on the bolometer, and
• after the bolometer is turned on, the processor is further configured to
• identify a region in the two-dimensional thermal image having temperature values larger than a temperature threshold as a processed region,
• determine an image region in the image information corresponding to the processed region,
• ignore objects in the image information outside the image region to eliminate interference from ambient light, and
• remove a non-human image among object images in the image information.