LibTiff Mailing List

TIFF and LibTiff Mailing List Archive
December 2008

Previous Thread
Next Thread

Previous by Thread
Next by Thread

Previous by Date
Next by Date

The TIFF Mailing List Homepage
This list is run by Frank Warmerdam
Archive maintained by AWare Systems

2008.12.11 00:12 "TIFF sample images updated", by Bob Friesenhahn

Hopefully there will not be too many downloads since the packages are 
quite large (4.3MB each) and the downloads will be very very slow but 
I have generated new sets of TIFF test images using GraphicsMagick. 
The unique feature of these files is that they support integer bit 
depths of 1-32 and 64 bits, as well as 32 and 64-bit floats (value 
range 0.0 to 1.0).  The various storage schemes (strip, tile, 
contiguous, planar) and photometrics offered by TIFF are used.  Each 
image set contains 254 TIFF files. The intention of the sample files 
is to help applications improve interoperability and become better at 
reading unusual bit depths.  Some bit depths are just plain weird but 
others (e.g. 4) are quite useful.

Here is some tiffinfo output to provide an idea of how unique these 
files really are:

TIFF Directory at offset 0x79f0 (31216)
   Image Width: 73 Image Length: 76
   Tile Width: 16 Tile Length: 16
   Resolution: 72, 72 (unitless)
   Bits/Sample: 13
   Sample Format: unsigned integer
   Compression Scheme: None
   Photometric Interpretation: RGB color
   Samples/Pixel: 3
   Planar Configuration: separate image planes
   Page Number: 0-1
   DocumentName: tiger-rgb-tile-planar-13.tif
   ImageDescription: 13-bit tiled separated RGB image
   Software: GraphicsMagick 1.4 unreleased Q32 http://www.GraphicsMagick.org/

These image sets are available.

Little-endian TIFFs:
   ftp://ftp.graphicsmagick.org/pub/outgoing/tiff-sample-images.tar.gz

Little-endian BigTIFFs:
   ftp://ftp.graphicsmagick.org/pub/outgoing/bigtiff-sample-images.tar.gz

Please let me know if big-endian versions are needed.

Bob
======================================
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/