09-12-2014, 12:53 AM
for the purpose of participating in the workshop
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scalable coding of encrypted images ppt
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for the purpose of participating in the workshop
29-03-2017, 02:56 PM
A new scalable encoding scheme for encrypted images. In the encryption phase, the original pixel values are masked by an addition of 256 module with pseudorandom numbers derived from a secret key. After decomposing the encrypted data into a sampled subimage and multiple data sets with a multiple resolution construct, an encoder quantifies the Hadiamard subimage and coefficients of each data set to reduce the amount of data. Then, the quantized sub-image data and the coefficients are considered as a set of bit streams. At the receiver side, while a subimage is decrypted to provide approximate information of the original content, the quantized coefficients can be used to reconstruct the detailed content with an iterative update procedure. Due to the hierarchical coding mechanism, the main original content with higher resolution can be reconstructed when more bitstreams are received.
A unique scalable encoding scheme for PRNG encrypted images. In the encryption step, the original pixel values are masked by an addition of 256 module with pseudorandom numbers resulting from a secret key. After decomposition of the encrypted data into a sampled subimage and some data sets with a multiple resolution construct, an encoder quantifies the Hadiamard subimage and coefficients of each data set to condense the amount of data. Then, the quantized secondary image data and the coefficients are viewed as a set of bit streams. At the receiver side, while a sub image is decrypted to provide unequal information of the original content, the quantized coefficients can be used to reconstruct the detailed content with an iterative update procedure. Because of the hierarchical encoding mechanism, the original master content with advanced resolution can be rebuilt when more bit streams are received.
A unique scalable encoding scheme for PRNG encrypted images. In the encryption step, the original pixel values are masked by an addition of 256 module with pseudorandom numbers resulting from a secret key. After decomposition of the encrypted data into a sampled subimage and some data sets with a multiple resolution construct, an encoder quantifies the Hadiamard subimage and coefficients of each data set to condense the amount of data. Then, the quantized secondary image data and the coefficients are viewed as a set of bit streams. At the receiver side, while a sub image is decrypted to provide unequal information of the original content, the quantized coefficients can be used to reconstruct the detailed content with an iterative update procedure. Because of the hierarchical encoding mechanism, the original master content with advanced resolution can be rebuilt when more bit streams are received.
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