2007.12.08 18:34 "Re: [Tiff] dpi settings", by Ron Croonenberg

Hi Bob,

thanks.

No I am not doing that from the command line. I have a few functions in a c program that creates images from simulations.

So basically this would set my image to 600dpi, both directions:

TIFFSetField(tiff, TIFFTAG_RESOLUTIONUNIT, RESUNIT_INCH);

TIFFSetField(tif, TIFFTAG_XRESOLUTION, 600);

TIFFSetField(tif, TIFFTAG_YRESOLUTION, 600);

thanks,

Ron

Is there a way to set the dpi settings for/in a tiff file? (and if so how do I do set them ?)

Yes. Use the TIFF tags TIFFTAG_RESOLUTIONUNIT, TIFFTAG_XRESOLUTION, and TIFFTAG_YRESOLUTION with the TIFFSetField() function.

TIFFTAG_RESOLUTIONUNIT supports the values RESUNIT_NONE, RESUNIT_INCH, or RESUNIT_CENTIMETER.

If you mean to do this from the command line, then see the documentation for the 'tiffset' utilitity. This documentation even comes with an example for how to set the resolution.

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