Improved Grouping and Noise Cancellation for Automatic Lossy Compression of AVIRIS Images - Advanced Concepts for Intelligent Vision Systems - page 264

(a) (b)

(c) (d)
Fig. 3. The noisy sub-band image (Cuprite, channel 2): original (a) one and the image
after compression/decompression (b). The sub-band image with high SNR (Cuprite,
channel 30), original (c) one and the image after compression/decompression (d).

3 ImprovedMethodforCompressingAVIRISData

In the earlier study [16], two methods of the HSI automatic lossy compression
have been proposed. For both of them, the first stage is the blind evaluation
of the additive noise variance σ 2
n

, n =1 ,..., 224 (the AVIRIS imager has 224
sub-bands). The method called M1 in [16], presumes a component-wise lossy