Opened 15 years ago
Closed 13 years ago
#2805 closed defect (fixed)
JP2ECW driver fails in decompressing lossless JPEG2000
| Reported by: | Jukka Rahkonen | Owned by: | warmerdam |
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| Priority: | normal | Milestone: | |
| Component: | GDAL_Raster | Version: | unspecified |
| Severity: | normal | Keywords: | JP2ECW |
| Cc: |
Description
Lossless (reversible) JPEG2000 images decompressed with gdal JP2ECW driver are not similar to original images. JP2KAK and JP2MrSID drivers are decompressing lossless images correctly.
Gdal version is the one that comes with FWTools 2.2.8. Lossless JPEG2000 images were created with kdu_compress v.6.0. Atteched sample image was compressed with kdu_compress by using defaults, except Creversible=yes option.
Attachments (1)
Change History (3)
by , 15 years ago
| Attachment: | Christmas_gerbile.jp2 added |
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comment:1 by , 15 years ago
| Component: | default → GDAL_Raster |
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| Keywords: | JP2ECW added |
I have also observed this problem on reversible files with the JP2ECW driver. I *presume* it is a problem within the ECW SDK itself but it is possible there is some option we are failing to set properly. I am not sure how to pursue this matter and I don't anticipate any progress on it in the near future.
comment:2 by , 13 years ago
| Resolution: | → fixed |
|---|---|
| Status: | new → closed |
I have talked to Erdas about this and it is a problem in the SDK. It still exists in 4.1, but I have confirmed that it is fixed in 4.2 and we get back exact values for reversibly compressed images.
Lossless JPEG2000 image sample