Hi
When using the default raster sld I can easily get rid of the black areas by
setting the output transparent color to black. When I additionaly want to
enhance the contrast with the following sld, the black areas are still there:
<StyledLayerDescriptor version="1.0.0">
<NamedLayer>
<Name>ACTUAL_LAYER_NAME_HERE</Name>
<UserStyle>
<FeatureTypeStyle>
<Rule>
<Name>rule1</Name>
<RasterSymbolizer>
<ChannelSelection>
<RedChannel>
<SourceChannelName>1</SourceChannelName>
<ContrastEnhancement>
<Normalize />
<GammaValue>1</GammaValue>
</ContrastEnhancement>
</RedChannel>
<GreenChannel>
<SourceChannelName>2</SourceChannelName>
<ContrastEnhancement>
<Normalize />
<GammaValue>1</GammaValue>
</ContrastEnhancement>
</GreenChannel>
<BlueChannel>
<SourceChannelName>3</SourceChannelName>
<ContrastEnhancement>
<Normalize />
<GammaValue>1</GammaValue>
</ContrastEnhancement>
</BlueChannel>
</ChannelSelection>
</RasterSymbolizer>
</Rule>
</FeatureTypeStyle>
</UserStyle>
</NamedLayer>
</StyledLayerDescriptor>
The images are all RGB images. I tried it with adding an alpha channel but the
black areas are still there. Is there a way to get rid of black areas with
channel selection and contrast enhancement?
Best regards
Stefan
Freundliche Grüsse
Stefan Ziegler
Leiter amtliche Vermessung
Amt für Geoinformation
Amtliche Vermessung
Rötistrasse 4
4500 Solothurn
Telefon +41 32 627 75 96
Telefax +41 32 627 75 98
stefan.zieg...@bd.so.ch
http://www.so.ch
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