US 11,941,886 B2
Object detection method and camera apparatus
Kevin Len-Li Lim, Penang (MY); and Joon Chok Lee, Penang (MY)
Assigned to PixArt Imaging Inc., Hsin-Chu (TW)
Filed by PixArt Imaging Inc., Hsin-Chu (TW)
Filed on Jul. 27, 2021, as Appl. No. 17/385,957.
Prior Publication US 2023/0030415 A1, Feb. 2, 2023
Int. Cl. G06V 10/50 (2022.01); G06V 10/60 (2022.01); G06V 10/75 (2022.01); G06V 20/52 (2022.01)
CPC G06V 20/52 (2022.01) [G06V 10/50 (2022.01); G06V 10/60 (2022.01); G06V 10/758 (2022.01)] 19 Claims
OG exemplary drawing
 
1. An object detection method of effectively increasing identification accuracy, the object detection method comprising:
acquiring a first reference image and a second reference image containing a specific surveillance area respectively via a first exposure parameter and a second exposure parameter greater than the first exposure parameter;
utilizing the first exposure parameter and the second exposure parameter to respectively capture a first detection image and a second detection image during a motion detection period;
computing a first pixel value variation between the first reference image and the first detection image, and a second pixel value variation between the second reference image and the second detection image; and
analyzing the first pixel value variation and the second pixel value variation to determine whether a target object is moved within the specific surveillance area.