Opened 17 years ago

Closed 16 years ago

#1739 closed enhancement (fixed)

VRTKernelFilteredSource does not respect nodata

Reported by: asgerpetersen Owned by: warmerdam
Priority: normal Milestone: 1.6.0
Component: default Version: unspecified
Severity: normal Keywords:
Cc:

Description

At the moment nodata values are not recognized and are therefore included in the convolution like any other value.

I suggest the following: If the source pixel corresponding to the output pixel is nodata then set the output pixel to nodata. Otherwise do normal convolution with the exception that nodata pixels are not used when calculating input pixel sum and kernel sum.

This way results are a lot more like one (ie. I) would expect.

I have attached my version of vrtfilters.cpp which has the above mentioned modification.

Attachments (1)

vrtfilters.cpp​ (22.1 KB ) - added by asgerpetersen 17 years ago.

Download all attachments as: .zip

Change History (2)

by asgerpetersen, 17 years ago

Attachment: vrtfilters.cpp​ added

comment:1 by Even Rouault, 16 years ago

Milestone: → 1.6.0
Resolution: → fixed
Status: new → closed

Thanks. Applied in r15362. Test added in r15364

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