Sentence examples for coefficient scan from inspiring English sources
The coefficient scan order permutation encryption strategy (CSOP) changes the coefficient scan order for discrete cosine-transform-based compression standards.
Figure 5 Number of average bits per each bitplane ( Seventh quantizer table, Coefficient by coefficient scan).
CSOP: Lena image scrambling using coefficient scan order permutation of HP, LP, and LP + HP frequency bands and using spatial (first line) and frequency store mode (second line).
First, the JPEG XR standard specifies an algorithm that adapts and optimises the coefficient scan order during encoding according to the image data.
Table 4 Comparison of the key space of presented encryption methods Method Key space Coefficient scan order permutation (CSOP) M n i !
Apart from[7, 8], where coefficient scan order permutation, sign bit encryption, and random level shift encryption have been proposed for JPEG XR encryption, no further JPEG XR-specific encryption methodology has been considered so far.
As can be seen, the proposed bitplanewise zigzag scanning method provides close performance to that for the optimum scanning method and much better performance than the coefficient scanning method.
The samples were characterized by the following experimental techniques: thermogravimetric analysis/differential thermal analysis (TGA/DTA), compressive strength tests, determination of the chloride migration coefficient, scanning electron microscopy (SEM), electrical resistivity measurement and mercury intrusion porosimetry (MIP).
The modifications include a simplification of coefficient scanning process, use of a 1-D addressing method instead of the original 2-D arrangement for wavelet coefficients and a fixed memory allocation for the data lists instead of the dynamic allocation required in the original SPIHT.
The fraction of the potential window dominated by faradaic reactions was a unique function of a dimensionless parameter Πf accounting for the respective contributions of the electrode thickness, Li+ diffusion coefficient, and scan rate.
(c) Cryptographic security: the AC coefficients zigzag scan used in I-frames encoding is replaced by a pseudorandom permutation.
