Surface character recognition method of composite material

The invention discloses a composite material surface character recognition method, which relates to the technical field of character recognition, and comprises the following steps of: processing an image by using an edge-preserving filtering algorithm, carrying out gray stretching by using a penalty factor to obtain a detail weight matrix, carrying out threshold truncation on the image to obtain a high-reflection area weight matrix, processing the image by using top-hat transformation to obtain an image A, and carrying out surface character recognition on the image A; the method comprises the following steps: carrying out processing by utilizing an edge-preserving filtering algorithm A to obtain low-frequency information, carrying out joint bilateral filtering processing on an image F and the image A to obtain an image Anr, fusing the low-frequency information and the image Anr by utilizing a detail weight matrix and a high-reflection area weight matrix to obtain an image Afinal, carrying out Gaussian filteri