Sentence examples for of lip segmentation from inspiring English sources

Determining key points is the critical stage of lip segmentation.

There are various methods of lip segmentation, such as a method based on MAP-MRF framework [1], a clustering approach without knowing segment number [2], and the active contour model (ACM) involved in this paper.

The focus of this paper is lip segmentation, so we just take the lip area as region of interest.

This is one reason why we prefer to perform mouth detection instead of accurate but time-consuming lip segmentation.

Unlike [11, 12], we have not used lip blue make-ups in data recordings since we do not need lip segmentation for extraction of geometric features such as width and height.

An example of lip image segmentation is shown in the Figure 3. Experimental results on five hundred lip images show that the hybrid approach produces more accurate segmentation [ 11].

Lip segmentation is fundamental to visual lip reading systems, because the accuracy of segmentation result directly affects the recognition rate.

In order to improve and perfect the lip segmentation, we propose the inner initial contour according to the shape of outer contour.

It retains more useful lip edge information and provides a more favorable condition for the subsequent lip segmentation study.

Lip segmentation plays an important role in a visual lip reading system, since the segmentation result is crucial to the final recognition accuracy.

This difference makes the lip segmentation from the background more convenient.