The invention belongs to the crossing field of image
information security and
digital image signal processing, and discloses a line art picture hiding and recovering method and equipment, and a storage medium. A blindage image is converted into a multi-order
halftone image, secret information is subjected to multiple backups, a secret
information embedding position is positioned according to a user secret key, the secret information and blindage pixels are coded in combination with the thickness of a line graph, and a secret-containing line graph is generated. The secret information is decodedaccording to the key, and the accuracy of secret
information recovery is improved through a secret
information recovery strategy based on multiple backups. Compared with the existing method, the method according to the invention is advantageous in that the hiding and recovering process strictly depends on a user secret key, the certain
attack tolerance capacity and recovering capacity are achieved, the secret embedding capacity is high, the transmission cost is low, the generated secret embedding shelter is a special carrier, an original shelter is not transmitted in a channel, detection of asecret analyzer based on natural image statistical characteristics can be resisted, and high safety is achieved.