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2007.08.07 15:27 "Indexed Images - part 2", by Christian Henning

2007.08.07 15:31 "Re: Indexed Images - part 2", by Christian Henning

2007.08.07 15:31 "Re: Indexed Images - part 2", by Christian Henning

OK OK , I got now. the following works:

   short* red;
   short* green;
   short* blue;

   TIFFGetFieldDefaulted( file, TIFFTAG_COLORMAP, &red, &green, &blue );

Thanks Frank for the other post.

Christian

On 8/7/07, Christian Henning <chhenning@gmail.com> wrote:
> Hi there, it's not my day it seems. This time I'm trying to read an
> indexed image. But reading the color map is crashing the application.
> I'm using the jello.tif test image. The photometric value is set to 3
> which indicates an indexed image.
>
> Here is what I'm doing:
>
> int main()
> {
>    TIFF* file = TIFFOpen( "jello.tif", "r" );
>
>    tsize_t width;
>    tsize_t height;
>    short bits_per_sample;
>    short samples_per_pixel;
>    short photo_metric;
>
>    TIFFGetField( file, TIFFTAG_BITSPERSAMPLE, &bits_per_sample );
>    TIFFGetField( file, TIFFTAG_SAMPLESPERPIXEL, &samples_per_pixel );
>    TIFFGetField( file, TIFFTAG_IMAGEWIDTH, &width );
>    TIFFGetField( file, TIFFTAG_IMAGELENGTH, &height );
>    TIFFGetField( file, TIFFTAG_PHOTOMETRIC, &photo_metric );
>
>    toff_t* color_map = NULL;
>    TIFFGetFieldDefaulted( file, TIFFTAG_COLORMAP, &color_map );
>
>    return 0;
> }
>
> I'm sure it's something very simple.
>
> Thanks in advance,
> Christian
>