关键词: 啤酒瓶字符, 圆周投影, 特征提取, 字符识别

Abstract: Completed for the partition of beer bottles convexity characters，an image feature extraction method is put forward based on circular projection.By mass center for the pole，it will transform Cartesian coordinates to a coordinate system.With circular projection calculating，two-dimensional images of characters will transform one-dimensional projection.By using Wavelet Transform（WT） and the Discrete Cosine Transform（DCT），the effective feature extractions of different characters are got.Through the same character similar to the feature extraction experiments，it shows that the method has good anti-noise and very good classification performance.

Key words: beer bottle raised character, circular projection, feature extraction, character recognition