AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2002.09.11 13:55 "Tags modifcation", by Gerben Koopmans
2002.09.11 14:21 "Re: Tags modifcation", by Frank Warmerdam
2002.09.30 18:23 "Re: Seek help", by Zhongfu Zhou
2002.09.30 17:34 "Seek help", by Zhongfu Zhou
2002.09.30 18:00 "Re: Seek help", by Frank Warmerdam
2002.10.01 04:36 "Re: Seek help", by Peter Montgomery

2002.09.30 18:23 "Re: Seek help", by Zhongfu Zhou

Dear Frank,

Thank you very much for your direction. I urgly need to generate some images from data produced in my simulating programme by Fortran. I have spent two days and tried many methods to deal with it, but it still doesn't work. I am really not familar with both C and tifflib.

Actually I want to set the levels of gray up to 256, i.e. the data marix maybe like, not only 0 and 1:

1, 120, 126...
30, 45, 0...
.........
255, 19,...

and the size maybe till 1000*1000.

I tried to define "unsigned char buffer[100]", but it only can be used to save single character.

Best regards,

Zhongfu

In message <3D989131.5050004@pobox.com> warmerdam@pobox.com writes:

> Zhongfu Zhou wrote:
> >     uint32 lSize;
> >     int buffer[100];

>
>...
>
> > TIFFSetField(image,TIFFTAG_BITSPERSAMPLE, 8);
>
>...
>
> > TIFFWriteEncodedStrip(image,0,buffer,100);
>
> Zhou,
>
> Your fundamental mistake is using a 32 bit integer buffer 'buffer', when
> actually writing an 8bit per sample image. Try declaring buffer as
> "unsigned char buffer[100]" instead. I haven't tried your code so there
> may be other problems as well.