| 主权项 |
1. A navigation device comprising:
an illumination source; a CMOS image sensor directed toward a work surface on which the navigation device is being operated for capturing an image frame of the work surface on which the navigation device is being operated with a predetermined image capture parameter; a memory unit having a lookup table stored therein, the lookup table comprising:
a plurality of surface quality profiles of different surface categories associated with different predetermined work surfaces, wherein each of the surface quality profiles is a surface quality distribution associated with one of the different predetermined work surfaces with respect to a set of quality thresholds, anda plurality sets of tracking parameters, wherein each of the surface categories is associated with one set of the tracking parameters and each set of the tracking parameters comprises a filter size and a filter strength; and a processor having an input coupled to the CMOS image sensor to post-process the image frame output from the CMOS image sensor, the post-processing of the processor being configured to:
calculate surface qualities of the image frame,compare the surface qualities of the image frame with the lookup table to determine a surface category of the work surface on which the navigation device is being operated, andperform a tracking operation according to the set of the tracking parameters corresponding to the surface category of the work surface on which the navigation device is being operated. |
