Hi Daniele, im currently using 23.1 but i also tried with 23.4 and i get
the same result, seems like the alpha band can't be handled because i tried
to remove it with GDAL and everything works fine.
Il giorno mer 24 feb 2021 alle ore 09:43 Daniele Romagnoli <
daniele.romagn...@geo-solutions.it> ha scritto:
> Hi Lorenzo,
> which GeoTools version are you using?
>
> I have just quickly tried with GeoTools master your very same code also
> adding a final piece of code doing a rewrite on disk:
>
> writer = new GeoTiffWriter(new File("d:/download/writeback.tif"), null);
> writer.write(grid, null);
> writer.dispose();
>
> and I didn't see any error and the image looks as the input one.
>
>
> Please,let me know.
> Regards,
> Daniele
>
>
>
> On Mon, Feb 22, 2021 at 9:36 PM Lorenzo Di Giacomo <loridi...@gmail.com>
> wrote:
>
>> Hi, i have a problem that i dont understand if GEOTOOLS handles (maybe
>> with some HINTS), basically i read a TIFF image then i serialized it :
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> *public static byte[] gridToBytes(GridCoverage2D grid) throws IOException
>> { ByteArrayOutputStream baos = new ByteArrayOutputStream(); GeoTiffWriter
>> writer = new GeoTiffWriter(baos, null); writer.write(grid,
>> null); writer.dispose(); byte[] bytes =
>> baos.toByteArray(); baos.flush(); baos.close(); return bytes;}*
>>
>> Then i deserialize it with:
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> * public static GridCoverage2D bytesToGrid(byte[] bytes) throws
>> IOException { ByteArrayInputStream bais = new
>> ByteArrayInputStream(bytes); GeoTiffReader reader = null; try
>> { Hints hints = new
>> Hints(Hints.FORCE_LONGITUDE_FIRST_AXIS_ORDER, Boolean.TRUE);
>> reader = new GeoTiffReader(bais, hints); GridCoverage2D grid =
>> reader.read(null); bais.close(); return grid;
>> } catch (IllegalArgumentException e) { throw new
>> IOException("Error on deserialization on tile"); } }*
>>
>> It works fine with some images, but i found some tiff (i have 150 of
>> those, uploaded one for you if you wanna try:
>> https://mega.nz/file/qJlEyTIQ#jgCE5pwfD5Y_AiUj2hSLTvTIS0lZ4CSm5D0Vb0eTk7U
>> )
>> that gaves this error on deserialization:
>>
>>
>>
>>
>>
>>
>>
>>
>> *Caused by: java.lang.IllegalArgumentException: bandOffsets.length is
>> wrong! at
>> javax.imageio.ImageTypeSpecifier$Interleaved.<init>(ImageTypeSpecifier.java:286)
>> at
>> javax.imageio.ImageTypeSpecifier.createInterleaved(ImageTypeSpecifier.java:399)
>> at
>> it.geosolutions.imageio.plugins.tiff.TIFFDecompressor.getRawImageTypeSpecifier(TIFFDecompressor.java:1027)
>> at
>> it.geosolutions.imageioimpl.plugins.tiff.TIFFImageReader.getImageTypes(TIFFImageReader.java:1359)
>> at
>> org.geotools.coverage.grid.io.AbstractGridCoverage2DReader.setLayout(AbstractGridCoverage2DReader.java:1167)
>> at org.geotools.gce.geotiff.GeoTiffReader.getHRInfo(GeoTiffReader.java:342)*
>> And, using gdal i get:
>>
>> *Warning 1: TIFFReadDirectory:Sum of Photometric type-related color
>> channels and ExtraSamples doesn't match SamplesPerPixel. Defining non-color
>> channels as ExtraSamples.*
>> GDAL handle it putting this band (should bhe the 4th band, alpha channel)
>> as ExtraSamples.
>> How can I walk-around with GeoTools to read the image back? Are there any
>> HINTS that i could use?
>>
>> Thanks
>>
>> _______________________________________________
>> GeoTools-Devel mailing list
>> GeoTools-Devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/geotools-devel
>>
>
>
> --
> Regards,
> Daniele Romagnoli
> ==
> GeoServer Professional Services from the experts! Visit
> http://goo.gl/it488V for more information.
> ==
>
> Ing. Daniele Romagnoli
> Senior Software Engineer
>
> GeoSolutions S.A.S.
> Via di Montramito 3/A
> 55054 Massarosa (LU)
> Italy
> phone: +39 0584 962313
> fax: +39 0584 1660272
>
> http://www.geo-solutions.it
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