Improved Grouping and Noise Cancellation for Automatic Lossy Compression of AVIRIS Images - Advanced Concepts for Intelligent Vision Systems - page 266

(a) (b)

(c) (d)
Fig. 4. The noisy sub-band image (Moffett Field, channel 128): the original (a) one
and the image after compression/decompression (b). The sub-band image with lower
SNR (Moffett Field, channel 223): the original (c) one and the image after compres-
sion/decompression (d).

QS =4 . 5. The values σ 2
n

, n =1 ,..., 224 or, better, σ n , n =1 ,..., 224 are coded
in a lossless manner and passed as side information to be used at the final stage
of the decompression.
The decompression has to be performed in the inverse order. After the first
stage, the normalized decompressed images are obtained. Then, they are scaled