A method for the preparation of touching and degraded text

摘要

The present invention provides a method and apparatus for enhancingand recognizing connected and degraded text. The enhancement process comprisesfiltering a scanned image to determine whether a binary image value of an imagepixel should be complemented, determining whether complementing the value of thepixel reduces the sharpness of wedge-like figures in the image, and complementingthe binary value of the pixel when doing so does not reduce sharpness. Therecognition process may comprise determining primitive strokes in a scanned image,segmenting the scanned image into sub-character segments based on the primitivestrokes, identifying features which characterize the sub-character segments, andcomparing identified features to stochastic models of known characters anddetermining an optimum sequence of known characters based on the comparisonsthrough the use of Viterbi scoring and level building procedures.