A Novel Raster Map Exchange Scheme Based on Visual Cryptography
Raster map is an image that has been discretized in space and brightness, and it is an important carrier of geospatial data. With the rapid development of Internet and big data technologies, preserving the privacy of raster map has become an urgent task. To solve these issues, we propose a novel ext...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Multimedia |
| Online Access: | http://dx.doi.org/10.1155/2021/3287774 |
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| _version_ | 1850167565959036928 |
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| author | Lijing Ren |
| author_facet | Lijing Ren |
| author_sort | Lijing Ren |
| collection | DOAJ |
| description | Raster map is an image that has been discretized in space and brightness, and it is an important carrier of geospatial data. With the rapid development of Internet and big data technologies, preserving the privacy of raster map has become an urgent task. To solve these issues, we propose a novel extended visual cryptography scheme to securely store a raster map into other two meaningful halftone maps in the paper. The scheme avoids the random-looking shares of visual cryptography schemes which are vulnerable and hard to manage. We first apply the halftone and color decomposition methods to transform a color secret map into halftone images. After that, we encode the secret map block by block to avoid pixel expansion. At last, by optimizing the selection of encrypted blocks, we achieve a high-quality secret recovery from generated multiple equal-sized shares. The technique used is to employ a versatile and secure raster map exchange. Experimental results show that, compared with previous work, the proposed scheme significantly improves the performance of recovered raster maps. |
| format | Article |
| id | doaj-art-e72418e9b42540588bb835fdbcde4d08 |
| institution | OA Journals |
| issn | 1687-5680 1687-5699 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Multimedia |
| spelling | doaj-art-e72418e9b42540588bb835fdbcde4d082025-08-20T02:21:10ZengWileyAdvances in Multimedia1687-56801687-56992021-01-01202110.1155/2021/32877743287774A Novel Raster Map Exchange Scheme Based on Visual CryptographyLijing Ren0Shijiazhuang Tiedao University, Shijiazhuang 050043, ChinaRaster map is an image that has been discretized in space and brightness, and it is an important carrier of geospatial data. With the rapid development of Internet and big data technologies, preserving the privacy of raster map has become an urgent task. To solve these issues, we propose a novel extended visual cryptography scheme to securely store a raster map into other two meaningful halftone maps in the paper. The scheme avoids the random-looking shares of visual cryptography schemes which are vulnerable and hard to manage. We first apply the halftone and color decomposition methods to transform a color secret map into halftone images. After that, we encode the secret map block by block to avoid pixel expansion. At last, by optimizing the selection of encrypted blocks, we achieve a high-quality secret recovery from generated multiple equal-sized shares. The technique used is to employ a versatile and secure raster map exchange. Experimental results show that, compared with previous work, the proposed scheme significantly improves the performance of recovered raster maps.http://dx.doi.org/10.1155/2021/3287774 |
| spellingShingle | Lijing Ren A Novel Raster Map Exchange Scheme Based on Visual Cryptography Advances in Multimedia |
| title | A Novel Raster Map Exchange Scheme Based on Visual Cryptography |
| title_full | A Novel Raster Map Exchange Scheme Based on Visual Cryptography |
| title_fullStr | A Novel Raster Map Exchange Scheme Based on Visual Cryptography |
| title_full_unstemmed | A Novel Raster Map Exchange Scheme Based on Visual Cryptography |
| title_short | A Novel Raster Map Exchange Scheme Based on Visual Cryptography |
| title_sort | novel raster map exchange scheme based on visual cryptography |
| url | http://dx.doi.org/10.1155/2021/3287774 |
| work_keys_str_mv | AT lijingren anovelrastermapexchangeschemebasedonvisualcryptography AT lijingren novelrastermapexchangeschemebasedonvisualcryptography |