Domain: ermapper.com
Stories and comments across the archive that link to ermapper.com.
Comments · 8
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Re:JPEG2000
There are viewers which are more suitable for biggies like this. Try for example the viewer from ER Mapper http://www.ermapper.com/ProductView.aspx?t=160/
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Re:Qua?
Watermarking is a process that happens when imagery is pulled from the image server, likely JPEG 2000, and occurs regardless whether the imagery was requested with the Google Earth application, the Google Earth API, or any other API that knows how to request imagery from the image server. The imaging server application is likely either written using ER Mapper's ECW JPEG 2000 SDK (a GPL-like open source license for images under 500mb - i.e., Google Earth images) or LizardTech's MrSID proprietary server. I'm guessing unless Google wrote their own imaging server, they chose ER Mapper's (I would), it's more flexible and written to JPEG 2000 standards.
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Re:Wavelets, anyone?
The JPEG2000 patent litigation appears to be near dead, with LizardTech asking for a rehearing of their failed appeal. Whether this frees up wavelets, JPEG2000, or just ER Mapper's specific JPEG2000, I'm not sure.
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Nope. JPEG 2000 also under patent threat
Except that JPEG 2000 is already under patent threat from a bunch called LizardTech... http://www.ermapper.com/company/news_view.aspx?PR
E SS_RELEASE_ID=356 -
Re:"it" being JPEG2k
When there isn't patent litigation surrounding the format.
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LizardTech bought the fractal technology and...added it as part of their line of products. You can get the Genuine Fractals product here. However, I don't believe the product compressed images very well without loss. If I remember right, it was more for enlarging pictures so that the people could work in detail without over-pixelation, then shrinking the finished work back down to its original size without losing resolution. Something like that.
They have another imaging technology that they purchased from AT&T called DjVu. They've Open Sourced the viewer for that technology under the GPL.
I believe an encoder/decoder is also available under a GPL license, though LizardTech doesn't appear to be happy with the GPL because they are pro software patents, and the GPL is not. The encoder/decoder may or may not be a fractal engine, someone more knowledgeable will have to answer that question.
LizardTech may be involved in a squable over the JPEG2000 technology. Something to do with patent litigation.
= 9J =
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Re:kinda skimpy on the technical detailsThe image took me 19 hr to download.
The download instruction page states "The full mosaic image file is in an ECW format. You can view this product with a free viewer called ER Viewer...
ECW is Enhanced Compressed Wavelet. developed by ERMapper. The image was compressed using ECW because it was pieced together using ERMapper. 3.2 GB fits nicely on a DVD.
Has anyone else downloaded the image? How long did it take?
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Look at ERMapper ECW too
It's also a wavelet system.
The difference is the free ECW SDK can do decompession of any size and compression of images up to 500Mb. If you want to compress larger than 500Mb you have to buy the software.
Last I checked, MrSID's free kit could only decompress, any compression required buying the software.
ECW is a little easier to try out.
ERMapper