2 results about "Watermark" patented technology

The invention is applicable to the technical field of computers, and provides a watermark adding method, device and equipment and a storage medium. The watermark adding method comprises the followingsteps: determining a check value of each digit according to a numerical value and a position value of each digit in a secret key; determining a three-digit character string set corresponding to each digit according to the numerical value, the position value and the check value of each digit; and replacing three-bit character strings of partial data in target data with three-bit character strings in the three-bit character string set to generate watermark-added data. According to the watermark adding method provided by the embodiment of the invention, the watermark information is used as a partof the data to be inserted into the data to be added with the watermark, the confidentiality is high, and the secret key can be quickly traced by utilizing the check value.

The invention discloses an image confrontation watermark generation method based on a particle swarm algorithm, and the method comprises the steps: combining an original image with a watermark through alpha mixing according to the position and transparency information of the watermark, and generating a watermark image; inputting the generated watermark image into a target neural network to obtain information of each classification confidence output by the target neural network; and on the basis of each classification confidence coefficient for the watermark image, obtaining an anti-watermark image through a particle swarm algorithm. According to the method, an adversarial watermark generation problem is modeled into an optimization problem, and the adversarial watermark is generated through a result of the optimization problem. And the optimization problem is efficiently solved by adopting a particle swarm algorithm. And a confidence coefficient difference value is used as an optimization target, so that omission of countermeasure watermark generation is avoided to a certain extent.