Opened 16 years ago

Closed 15 years ago

#2346 closed defect (fixed)

gdaladdo generates blocky artifacts in original image

Reported by: sprice Owned by: warmerdam
Priority: normal Milestone:
Component: default Version: unspecified
Severity: normal Keywords: gdaladdo
Cc:

Description

If you take the attached file and run the command "gdaladdo -r average N020W116_x2_trueMarble.tif 3 6 12 24 48 96" artifacts appear in the upper left of the dataset. The artifacts are about 16px high, and a total of 512px wide. I've seen the artifacts in black, reddish, solid, and blocky.

Change History (5)

comment:1 by sprice, 16 years ago

Attachment won't work (file too large), so here's a URL:

​http://ueod-globe.net/trueMarble/N020W116_x2_trueMarble.tif.gz

I should also mention that I'm running GDAL 1.5.1 on a Mac running 10.5.

comment:2 by sprice, 16 years ago

This problem does not seem to occur when using mode sampling.

comment:3 by Even Rouault, 16 years ago

I can't see any artifact in the image you've provided (I use OpenEV). Maybe it is your viewer that doesn't support big images with overviews ?

comment:4 by sderle, 15 years ago

upgrading to 1.6.0 fixed this for me (using the UbuntuGIS packages for Hardy)

comment:5 by Even Rouault, 15 years ago

Resolution: → fixed
Status: new → closed

Closing then. Reopen if reproduced with recent GDAL (1.6.1 e.g.)

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