This paper deals with how the piece of board is the recognition for machine vision. First webcams acquisition current position image, taking advantage of the program with pictures of read board piece, and then in the picture, and identify pieces positioning pieces. Identify chessboard and positioning pawn, can use edge detection and hoff transform method, when the edge detection is to ensure that should be paid attention to so that you can easily picture clarity lines. Find edge One board to consider the recognition algorithm of partially occluded cases robustness; Recognition of the pieces of writing method actual is identifying, but because the pieces to put to be able to identify the regularity and make sure use pawn pieces to the rotation invariant, namely pawn rotate any an Angle, do not affect identify pieces to the accuracy.
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