Xingang ZHANG, Haowen YAN, Liming ZHANG. A Perceptual Hash Algorithm for DEM Data Authentication and Tamper Localization [J]. Journal of Geo-information Science, 2020, 22(3): 379
- Journal of Geo-information Science
- Vol. 22, Issue 3, 379 (2020)
Fig. 1. Perceptual hash algorithm for DEM data authentication
Fig. 2. Discrete cosine transformation result of grid unit
Fig. 3. Original experimental data and grid partitioned data
Fig. 4. Rendering graphs of different DEM data attack types
Fig. 5. Tamper localization tests
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Table 1. Statistical results of robustness tests
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Table 2. Statistical results of tamper detection
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Table 3. Statistical results of the Hamming distance
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