 |
NASA Technical Reports Server (NTRS) 19950008181: Planning/scheduli... |
 |
by NASA Technical Reports Server (NTRS) |
 |
Thumbnail |
|
Download |
 |
Web page |
|
|
|
The enormous size of the data holding and the complexity |
|
of the information system resulting from the EOS system |
|
pose several challenges to computer scientists, one of |
|
which is data archival and dissemination. More than |
|
ninety percent of the data holdings of NASA is in the |
|
form of images which will be accessed by users across the |
|
computer networks. Accessing the image data in its full |
|
resolution creates data traffic problems. Image browsing |
|
using a lossy compression reduces this data traffic, as |
|
well as storage by factor of 30-40. Of the several image |
|
compression techniques, VQ is most appropriate for this |
|
application since the decompression of the VQ compressed |
|
images is a table lookup process which makes minimal |
|
additional demands on the user's computational resources. |
|
Lossy compression of image data needs expert level |
|
knowledge in general and is not straightforward to use. |
|
This is especially true in the case of VQ. It involves |
|
the selection of appropriate codebooks for a given data |
|
set and vector dimensions for each compression ratio, |
|
etc. A planning and scheduling system is described for |
|
using the VQ compression technique in the data access and |
|
ingest of raw satellite data. |
|
|
|
Date Published: 2016-10-07 07:09:58 |
|
Identifier: NASA_NTRS_Archive_19950008181 |
|
Item Size: 14022940 |
|
Language: english |
|
Media Type: texts |
|
|
|
# Topics |
|
NASA Technical Reports Server (NTRS);... |
|
|
|
# Collections |
|
NASA_NTRS_Archive |
|
additional_collections |
|
|
|
# Uploaded by |
|
@chris85 |
|
|
|
# Similar Items |
|
View similar items |
|
|
|
PHAROS |
|
