LibTiff Mailing List

Hi,

>Noureddine Farah wrote:
>>
>> Hi,
>>
>> I'm looking for samples of Tiled Tiff image. Any pointer or information
>> will be appreciated.
>>
>> Thank you
>>
>> Noureddine Farah
>
>Noureddine,
>
>In addition to other samples, I would encourage you to test with
>
>  http://gdal.velocet.ca/projects/tiff/data/from_imagine/irv_stile.tif
>
>It may be problematic in that it uses separate image planes and multiple
>samples.  This appears to be a rare combination and causes some problem
>in tiffcp.  Otherwise, you can just use tiffcp to create tiled files
>from existing striped files.

I loaded this image with a tiff filter written on the base on Sem Leffers
TiffLib and could see no problems. My filter gives the following file
information:

Fileinfo: 'D:\Projects\Filters\to-test\irv_stile(1).tif'
>>>>>>Real file entries:<<<<<<
Software: ''
Document Name: ''
Image Description: ''
Number of Directories: 1
Compression: dump mode (none)
Photometric: RGB color model
Sample Format: No SAMPLEFORMAT Tag!
Tile width: 64
Tile length: 64
Tile Depth: 0
Number of Tiles: 27
Planar Configuration: separate planes of data
---------------------------------
Width (Image Width or pixels per scanline): 150
Height (Image Length or scanlines): 150
Bits per Sample: 8
Samples per Pixel: 3
Image Depth (Slices): 0
Frame Count (Frames) - not supported: 0
======================================
>>>>>>>>>Dimensions decoded to:<<<<<<<<<
Width (Image Width or pixels per scanline): 150
Height (Image Length or scanlines): 150
Bits per Sample: 8
Bands: 3
Z-Slices (Image Depth): 1
T-Slices (Frames): 1

I think, this is a perfectly normal RGB picture with separated planes.

But I would be more interested on examples with three dimensional pictures
and picture sequences. With TiffLib I can load and save tiled images and use
Imagedepth for the third dimension - this seems to work perfectly. But if I
use strips to save the picture, the tiff lib seems to ignore the Imagedepth
tag (you can write and read it, but it is not involved in the calculation of
the picture structure, number of strips per image etc.).

We are also interested in a "legal way" to save image sequences (as in a
video). There is a "registered" Tifftag called Framecount, but it is not
read or written by TiffLib. You could use directories for that, but this is
quite ineffective. Before loading such a file one has to check all dirs,
whether the images all have the same properties or not, so that you can load
them as a "film".

Any information would be appreciated.

Johannes Leckebusch


AWARE [SYSTEMS]		Imaging expertise for the Delphi developer
		TIFF and LibTiff Mailing List Archive
	LibTiff Mailing List TIFF and LibTiff Mailing List Archive March 1999 Previous Thread Next Thread Previous by Thread Next by Thread Previous by Date Next by Date Contact The TIFF Mailing List Homepage This list is run by Frank Warmerdam Archive maintained by AWare Systems	Thread 1999.03.05 15:07 "Tiled Tiff", by Noureddine Farah 1999.03.05 15:40 "Re: Tiled Tiff", by Frank Warmerdam 1999.03.05 20:34 "Re: Tiled Tiff", by Johannes Leckebusch 1999.03.05 20:34 "Re: Tiled Tiff", by Johannes Leckebusch Hi, >Noureddine Farah wrote: >> >> Hi, >> >> I'm looking for samples of Tiled Tiff image. Any pointer or information >> will be appreciated. >> >> Thank you >> >> Noureddine Farah > >Noureddine, > >In addition to other samples, I would encourage you to test with > > http://gdal.velocet.ca/projects/tiff/data/from_imagine/irv_stile.tif > >It may be problematic in that it uses separate image planes and multiple >samples. This appears to be a rare combination and causes some problem >in tiffcp. Otherwise, you can just use tiffcp to create tiled files >from existing striped files. I loaded this image with a tiff filter written on the base on Sem Leffers TiffLib and could see no problems. My filter gives the following file information: Fileinfo: 'D:\Projects\Filters\to-test\irv_stile(1).tif' >>>>>>Real file entries:<<<<<< Software: '' Document Name: '' Image Description: '' Number of Directories: 1 Compression: dump mode (none) Photometric: RGB color model Sample Format: No SAMPLEFORMAT Tag! Tile width: 64 Tile length: 64 Tile Depth: 0 Number of Tiles: 27 Planar Configuration: separate planes of data --------------------------------- Width (Image Width or pixels per scanline): 150 Height (Image Length or scanlines): 150 Bits per Sample: 8 Samples per Pixel: 3 Image Depth (Slices): 0 Frame Count (Frames) - not supported: 0 ====================================== >>>>>>>>>Dimensions decoded to:<<<<<<<<< Width (Image Width or pixels per scanline): 150 Height (Image Length or scanlines): 150 Bits per Sample: 8 Bands: 3 Z-Slices (Image Depth): 1 T-Slices (Frames): 1 I think, this is a perfectly normal RGB picture with separated planes. But I would be more interested on examples with three dimensional pictures and picture sequences. With TiffLib I can load and save tiled images and use Imagedepth for the third dimension - this seems to work perfectly. But if I use strips to save the picture, the tiff lib seems to ignore the Imagedepth tag (you can write and read it, but it is not involved in the calculation of the picture structure, number of strips per image etc.). We are also interested in a "legal way" to save image sequences (as in a video). There is a "registered" Tifftag called Framecount, but it is not read or written by TiffLib. You could use directories for that, but this is quite ineffective. Before loading such a file one has to check all dirs, whether the images all have the same properties or not, so that you can load them as a "film". Any information would be appreciated. Johannes Leckebusch

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1999.03.05 20:34 "Re: Tiled Tiff", by Johannes Leckebusch