2007.11.15 15:36 "Re: [Tiff] Simple code to write Tiff images from Raw data", by Ron Croonenberg

Hello Frank,

here's the tiffinfo:

the first one is the one I built using the tifflib. The 2nd one is the

same image but viewed and than saved as a tiff with irfanview.

After I built the tiff irfanview and vliv recognize the image but not

too many other viewers (so far I only found irfanview and vliv to read
them). After I opened the tiff and saved it again as a tiff all viewers
so far can read it.

So I figured I must have done something wrong or forgot something.

btw: After irfanview saves the file below it's size grows
from 4.96Mb to 8.71M (but that's due to compression. apparently
irFanview doesn't create "deflated" files ?)

TIFF Directory at offset 0x4f6222 (5202466)
   Image Width: 4096 Image Length: 3072
   Bits/Sample: 8
   Compression Scheme: Deflate
   Photometric Interpretation: RGB color
   Orientation: row 0 top, col 0 lhs
   Samples/Pixel: 3
   Rows/Strip: 16
   Planar Configuration: single image plane
   ImageDescription: 3D Simulation
   Predictor: none 1 (0x1)
[ronc@wolf359 ~]$ tiffinfo fractal_3a.tif
TIFF Directory at offset 0x8b1f42 (9117506)
   Image Width: 4096 Image Length: 3072
   Resolution: 0, 0 pixels/inch
   Bits/Sample: 8
   Compression Scheme: LZW
   Photometric Interpretation: RGB color
   Orientation: row 0 top, col 0 lhs
   Samples/Pixel: 3
   Rows/Strip: 1
   Planar Configuration: single image plane
   Software: IrfanView

When I create a tiff file, not all viewers recognize it. However IrFanview and vliv do. After I save the image as a tiff with IrFanview other viewer do see it.

So I am probably missing a tag? or failed to set a field somewhere? What fields need to be set with 'TIFFSetField' so that all viewers can recognize the image?

It would be more constructive to provide a tiffinfo report of the file you produced, and the file produced by IrFanview.

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  Ron Croonenberg                   |
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