Hi!
Please advise the best way to compress satellite Image. Details
Uncompressed size - 60 gb Uncompressed format - IMG 4 Bands (To be retained after compression) Preferred compression format - JPEG2000 Lossy enough to aid in Visual analysis.
Thanks Monika
If I'm interpreting your question correctly, you'll already need to look at the file format defined in JPEG2000 Part 2 ("JPX") because of the multiple bands. Beyond that, because you are asking for "visually lossless" (e.g. lossy compression but tuned to the point where you can't see it), you'll need to experiment with various settings using your own files until you achieve what you want. For a small discussion on how the Internet Archive did this with print materials, see A Status Report on JPEG 2000 Implementation for Still Images: The UConn Survey.
You should check out the Kakadu JPEG 2000 software. It's really fast.
The summary of one of their time tests, which sounds in line with our observed results:
'"There is an example on the spreadsheet involving a 13.3K x 13.3K RGB image (531 MBytes), being compressed to 2 bits/pixel, at 0.145 pictures/second, using the speedpack on a standard 2.4 GB core-2 duo machine. From this, it can be inferred that compressing 60 MB down to 5 MB (12:1 is 2 bits/pixel for RGB, although colour properties were not specified in the original request) should occur at a rate of 1.2 pictures/second. Compressing to the slightly lower target size of 4 MB will be a little bit faster."