Multi-grayscale invisible two-dimensional code recognizing method

The invention provides a multi-grayscale invisible two-dimensional code recognizing method, which comprises the following steps of: obtaining a multi-grayscale two-dimensional code; reading each information code element with a plurality of stages of grayscales in a recognizing region; and outputting coded data after the decoding. By adopting the technical scheme, the multi-grayscale invisible two-dimensional code recognizing method has the advantages that the grayscale number and the invisible two-dimensional codes are introduced; the new multi-grayscale invisible two-dimensional code is redefined; the multi-grayscale invisible two-dimensional code bearing more code-borne information can be recognized, so that more code-borne information is obtained; the information storage quality is great; the information can be used as a character or image carrier; and higher market application values are realized.