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June 2012
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2012.06.18 23:31 "Re: How the multi-planar image should be read/written", by Frank Warmerdam
On Mon, Jun 18, 2012 at 4:15 PM, Jorge <jormarfe@gmail.com> wrote: > Hello > > As far I know, the bands of a multiplanar Image ( planarConfiguration tag > = 2) should be written one after the other. But for me, this is not > clear. Please, let me write an example to explain my understanding: > > We have an image withe the following parameters: > > Lines = 6000 > Columns = 1500 > The image has 5 different bands ( samplePerPixel = 5 ), and > planarconfiguration = 2 > The image is stripped, with the parameter RowsPerStrip = 100, so > there are 60 strips > > If I want to read this image using the function readEncodedStrip from > libtiff library. The number of strips to be read is 5*60? The first 60 > strips corresponds to the first band, the next 60 strips corresponds to > the second band and so on. Are this statements correct? Jorge, Yes, this all sounds right. And given five bands/samples you will have 60*5 = 300 strips. > > For Tiled image the approach should be similar, isn't it? Yes. Best regards, -- ---------------------------------------+-------------------------------------- I set the clouds in motion - turn up | Frank Warmerdam, warmerdam@pobox.com light and sound - activate the windows | http://pobox.com/~warmerdam and watch the world go round - Rush | Geospatial Software Developer