I hope you can help me.
I try a geotiff in a polygon (dgn) to clip and output as a pdf.
The clipped-Inside part is ok, that is the picture, but outside is the background black but this should be white.
Give it a way to change the color of the background?
Since the standard background of a pdf is white I would change the nodata values (black) in to white, see the RasterBandNodataSetter transformer.
If you transform the background part to a polygon geometry, I think the PDFStyler transformer can be used to set any color before drawing the polygon.
Takashi
I did it tried with the RasterBandNodataSetter.
In the DataInspector is it correct, but in the pdf is the background black again.
With the PDFstyler after the clipper is the background also black too.
A way around it is to convert the black edge (0,0,0) into white (since the pdf background is white) if you set the values 0 to nodata (RasterBandNodataSetter) and replace the values (RasterCellValueReplacer) to 255 (replace nodata = yes) you will get a white edge that doesnt show in pdf.
The only drawback is that if you have 0,0, 0 vlaues in the image and not the edge you will also convert them to white.
The pdf styler doenst work on rasters and there might be a way better.
Hope this helps,
Itay
Another idea is to consider writing to a 3Dpdf, since there the background color can be set to black (see navigator window > 3DPDF writer > Parameters > Background Color)
If using raster backgrounds within a pdf I clip the required area and set the remaining background to b&w
e.g. https://docs.google.com/file/d/0B7MfZT7yLKF8eUE2VEZnWEhROVU/edit?usp=sharing
This approach may work for you depending on what you are trying to acheive.
it works with the RasterCellValueReplacer. :o)