Patent ID: 11917304
Assignee: PIXART IMAGING INC.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 12:
13. A distance measurement method of an optical distance measurement system, comprising:
capturing, by an image sensor, a first image with a first exposure time;
capturing, by the image sensor, a second image with a second exposure time;
dividing the first image into a plurality of first image regions and calculating a first signal feature of each of the first image regions;
dividing the second image into a plurality of second image regions and calculating a second signal feature of each of the second image regions;
comparing the first signal feature of each of the first image regions with the second signal feature of the corresponding second image region; and
combining the first image region having the first signal feature larger than the corresponding second signal feature with the second image region having the second image feature larger than the corresponding first signal feature to form a combined image; and
calculating at least one object distance according to the combined image.