Academia.eduAcademia.edu

Figure 2 – uploaded by ambika vijayakumar

See full PDFdownloadDownload figure
Figure 2: A comparison between (a) the traditional approach to secure image and video commu-

Figure 2 A comparison between (a) the traditional approach to secure image and video commu-

Related Figures (13)

‘igure 1: A comparison between (a) the traditional approach to secure image and video communi-
‘igure 1: A comparison between (a) the traditional approach to secure image and video communi-
Figure 3: The hierarchy of wavelet coefficient bands.
Figure 3: The hierarchy of wavelet coefficient bands.
Figure 4: The trees of wavelet coefficients.
Figure 4: The trees of wavelet coefficients.
5.1 Quadtree Compression
5.1 Quadtree Compression
Figure 6: An example quadtree for a binary image.
Figure 6: An example quadtree for a binary image.
Table 2: Relative quadtree size in lossy quadtree compression.
Table 2: Relative quadtree size in lossy quadtree compression.
Figure 7: Plots of log, a;,,, for various values of h. uadtree with a run of length 14 is shown. Notice that the levels of the leaf nodes in this run do
Figure 7: Plots of log, a;,,, for various values of h. uadtree with a run of length 14 is shown. Notice that the levels of the leaf nodes in this run do
Figure 8: A quadtree with a run of length 14.
Figure 8: A quadtree with a run of length 14.
Table 3: The size of important part in the SPIHT algorithm.
Table 3: The size of important part in the SPIHT algorithm.
Figure 9: Reconstructed images using only the first k encrypted bits.
Figure 9: Reconstructed images using only the first k encrypted bits.
Figure 10: Residual error (after contrast enhancement) for frame 2 of the “claire” sequence
Figure 10: Residual error (after contrast enhancement) for frame 2 of the “claire” sequence
Table 4: The size of important part of the residual error for the test video sequences.
Table 4: The size of important part of the residual error for the test video sequences.
Figure 11: Sensitivity of quadtrees to the placement of a moving object.
Figure 11: Sensitivity of quadtrees to the placement of a moving object.
Related topics:
Image ProcessingData CompressionCryptographyVideo CompressionImage compressionWavelet TransformsCompression AlgorithmsVideo CommunicationMultimedia Application
580 California St., Suite 400
San Francisco, CA, 94104
© 2025 Academia. All rights reserved