Apparatus and method for recognizing subject motion using a camera

摘要

A method and an apparatus are provided for displaying pictures according to hand motion inputs. An application is executed for displaying a picture from among a sequence of pictures on a display. Groups of skin color blocks corresponding to a hand are detected from among image frames output from a camera. A motion is detected among the groups of skin color blocks. Direction information is obtained on the detected motion. The application is controlled to display a previous picture or a next picture in the sequence of pictures on the display according to the direction information.

主权项

1. A method for displaying pictures according to hand motion inputs, comprising:
executing an application for displaying a picture from among a sequence of pictures stored in a memory on a display; detecting, from a current image frame output from a camera, skin color blocks corresponding to a hand; detecting a group of motion blocks from the skin color blocks; detecting a motion of the group of motion blocks; obtaining momentum information on the detected motion; and controlling the application to display a previous picture or a next picture in the sequence of pictures on the display according to the momentum information, wherein the skin color blocks are detected by:
detecting skin color pixels from each of a plurality of image blocks included in the current image frame, each of the skin color pixels having a color value falling within a first threshold range; anddetecting the skin color blocks from among the plurality of image blocks by comparing a number of the detected skin color pixels in each of the plurality of image blocks with a first threshold, and wherein the group of motion blocks are detected by:
detecting motion pixels from each of the skin color blocks, a difference between a pixel value of each of the motion pixels in the current image frame and a pixel value of each of the motion pixels in a previous image frame output from the camera falling within a second threshold range; anddetecting the group of motion blocks from among the skin color blocks by comparing a number of the detected motion pixels in each of the skin color blocks with a seconded threshold, and wherein the momentum information is obtained by calculating momentum based upon the number of motion blocks and a distance between motion pixels in the current image frame and motion pixels in a previous image frame.