Dot matrix watermark design and identification method

Abstract

The invention provides a dot matrix watermark design and recognition method, which comprises a dot matrix watermark design method and a dot matrix watermark recognition method, and is characterized in that the dot matrix watermark is a five-row five-column matrix graph formed by 25 dots, the dot in the first row and the first column is the starting point of the matrix, the diameter of the dot is 8 pixels, the dot is represented by an identification code S, the starting point is displayed all the time, the diameters of the remaining 24 dots are 4 pixels and are represented by an identification code 0 or 1, 0 represents that the dots at the current position are not displayed, 1 represents that the dots at the current position are displayed, and the distance between every two dots is 60 pixels; the identification method comprises the following steps: 1, forward noise reduction; 2, reverse noise reduction; 3, solving an available region set; and 4, checking whether a white area exists at the position corresponding to the five-row five-column matrix of each available area, taking the area with a large area as a starting point, recording S, recording 1 if the area exists at the rest position on the available area, and recording 0 if the area does not exist at the rest position on the available area, so as to form an identification code to complete the identification of the dot matrix watermark.

Description

technical field [0001] The invention relates to a dot matrix watermark design and recognition method, belonging to the technical field of screen dot matrix design. Background technique [0002] In the current terminal data leakage prevention scenario, it is necessary to effectively prevent and manage the behaviors of users using mobile phones to take pictures, videos or screenshots of the screen when opening sensitive data. Currently, screen watermarking technology is mainly used to meet this requirement. Screen watermarks include text watermarks, dot matrix watermarks, and QR code watermarks. Among them, the dot matrix watermark is to display some slight dots or patterns composed of dots on the screen. Through these dots or symbols, a series of numbers can be obtained. The text information corresponding to this series of numbers is stored on the server. When the computer screen After the confidential information on the Internet is photographed and spread, it can be tracked...

AI Technical Summary

Problems solved by technology

However, the common dot matrix watermarks currently on the market have problems such as interfering with the normal use of users, difficult to identify, and insufficient robustness.

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