Safety Research To Mine Engineering Drawing

Mine well engineering map is a serial of drawings made in the process of mining design, operation and production management; it is very crucial technical data and important reference for mine engineering companies'the running managements and production guides. In recent years, as the instant deep application of computer and Internet technology in mine enterprises, the mine well engineering maps are more and more digitalized, the mine data are more and more informationalized, mine project design and mine well engineering maps'digital management has been the essential items in establishing a modern mine enterprise; at the same time, it is also the basic requirements and infrastructure construction in enterprises'enter into the digital and information time. But because the digitalized work is easy to be amended, copied and transferred, which make the piracy and malicious falsification more and more rampantly, the safety matter is becoming more and more important.This thesis is based on some of the existing problems in the mine well engineering map's design, drawing combined with mine enterprises' realistic, solve for some degree the current mine project drawing's safety matters such as embedded watermarking capacity limited, lack of robustness. The main wok as below:1. This thesis brings in a fractal idea, which based on the existing problems of realization and management to the digitalized mine well engineering map together with the TCAD development characteristics; raise a realization method of complete frequency lossless digital watermarking without amendments to digital data. First make short wave to the drawings, adopt Bandelet to track the drawing geometric flows in the medium-high frequency part, use the texture and edge as the drawing characteristics to make high frequency lossless watermarking parameter. For the short wave low frequency part, get low frequency coefficient watermarking parameter derivative plan by choosing the best normofamatrix, realize image statistics extraction and edge characteristics, and completely protect the images. This algorithm has good performance in anti-attack, could be widely applied in the protection to the un-amendable data.2. Two kinds of mine well engineering map semi-fragile watermarking plans have been raised based on the QR (Quick Response) resolution; because the existence of safety problem in accuracy located type semi fragile watermarking algorithm, the thesis chooses the image QR resolution, which is closely related to the image content, as the watermarking, then use the chaotic efficient encryption to strengthen watermarking safety.3. The thesis raises a mine well engineering map watermarking algorithm on Hadamard, which is anti-print and scan. The algorithm first divides the carrying images into blocks and makes selection, to have the embeddable watermarking blocks; before the embedment, combined with SVD (Snayperskaya Vinyovka Dragunov) division, apply different quantization step in different kinds of blocks to strengthen watermarking robustness. Then embed the above watermarking into the above blocks' phase by quantization method. This algorithm has robustness in usual practice, could testify the malice falsification to the content, with good location ability, low mistake and missing rate, good safety performance.The mine well engineering map safety research results rose in this thesis solves for degree the current watermarking method's capacity limitedness, weak robustness, is meaningful to the application of digital watermarking technology in the mine well engineering map safety.