| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method and apparatus for binarizing color images under a complicated background. <P>SOLUTION: The method for binarizing an image includes initializing, for each column of the image, a first set of variables representing a local column low pixel value and a local column high pixel value, and, for each row of the image, a second set of variables representing a local row low pixel value and a local row high pixel value. The following steps are iterated for each pixel: determining a threshold value dependent upon the first and second variables at each row of the location index and third and fourth variables at each column of the location index, in which the location index is dependent upon the iterated rows and columns, comparing a value representative of an image pixel at the location index with the determined threshold value, setting a binarization pixel for the location index to one or two values, dependent upon results of the comparison, and adjusting values included in the first and third variables or the second and fourth variables dependent upon the results of the comparison. <P>COPYRIGHT: (C)2003,JPO</p> |
