Abstract: An optical navigation system with a lift detection module is provided for preventing cursor movement if the optical navigation system has been lifted from the navigation surface. The optical navigation system may include an image sensor, a controller and a lift detection module. The lift detection module may be operatively coupled with the image sensor and the controller to selectively report a motion data upon determining a lift by comparing the average of the photosensitive pixel elements with a pixel element threshold value and the surface quality value with a surface quality threshold value. The lift detection module may be incorporated in a microcontroller, wherein the microcontroller may be added to a navigation system to provide an additional lift detection feature.

Abstract: A system and method for identifying and labeling cluster pixels in a frame of image data for optical navigation determines whether a current pixel of the frame of image data is a cluster pixel and uses neighboring pixels of the current pixel to label the current pixel as belonging to a new cluster or an existing cluster.

Abstract: A system and method for labeling feature clusters in frames of image data for optical navigation uses distances between feature clusters in a current frame of image data and feature clusters in a previous frame of image data to label the feature clusters in the current frame of image data using identifiers associated with the feature cluster in the previous frame of image data that have been correlated with the feature clusters in the current frame of image data.

Abstract: A system and method for identifying and labeling cluster pixels in a frame of image data for optical navigation determines whether a current pixel of the frame of image data is a cluster pixel and uses neighboring pixels of the current pixel to label the current pixel as belonging to a new cluster or an existing cluster.