Patent ID: 11921940
Assignee: PIXART IMAGING INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 10:
11. The method of claim 10, wherein the first surface operation condition is a glass surface operation condition corresponding to a glass surface while the second surface operation condition is a non-glass surface operation condition corresponding to a non-glass surface; it is determined that the optical navigation device is placed on the glass surface if the detected image quality of the image pattern with the image features is low and the detected frame average brightness is high; it is determined that the optical navigation device is placed on the non-glass surface if the detected image quality of the image pattern with the image features is high; and, it is determined that the optical navigation device is lifted if the detected image quality of the image pattern with the image features is low and the detected frame average brightness is low.