Research on Method of Safety Transmission of Coal Mine Digital Images Based on Wavelet Transform
Shi Qian · Journal of North China Institute of Science and Technology · 2015
In order to transmit coal mine digital images through the network securely,a new method for transmitting coal mine digital maps through information hiding is put forward in the paper,in which method,coal mine digital images are hidden to an vector image( such as,landscape or unimportant coal mine image),and the energy of hidden image is so small that these changes can't be felt in human vision. In the concrete realization,firstly,the carrier image is decomposed by wavelet transform,then the digital mine image information is hidden in the intermediate frequency part of the carrier image. The embedded energy is controlled automatically by using genetic algorithm,so as to balance the unobtrusiveness and robustness of the hidden coal mine digital image. The unobtrusiveness is that embedded coal mine digital image information is not easily perceived,and the robustness is that the protected information is not easily destroyed after a certain changes. Experiment results shows that the method is effective.