The invention belongs to the technical field of a
verification code, and in particular relates to a method for rapidly identifying a hollow
verification code. The method comprises the steps of firstly,
thinning a character
contour line of the
verification code in a preprocessing stage; secondly, only filling a character block through inner and outer contour lines to obtain a
solid character; thirdly, segmenting the
solid character to obtain single characters and character components; fourthly, analyzing structural characteristics and order associations of the character components, and combining the character components by use of a minimum nearest
neighbor algorithm to obtain the non-redundant single characters; and finally, identifying the single characters obtained after segmentation andcombination by use of a
convolutional neural network to obtain a final deciphering result. According to the method for rapidly identifying the hollow verification code, compared with an existing identification method, not only is an original structure kept from being not damaged, but also breakages of the character contour lines are guaranteed to be accurately repaired, the filling time can be shortened, the filling precision can be improved, accurate acquisition and
rapid identification of the hollow identification code are realized, the identification success rate is greatly improved, the applicability is high and better application values are provided.