2007.11.02 20:26 "[Tiff] Recent bug fixes in CVS head", by Frank
Warmerdam
Thread
2008.01.14 07:25 "RE: [Tiff] TIFFWriteScanline - write band orders", by Tillaart, Rob van den
Hi
Think the error is in the line
if (j ==height-2 )
It should be
if (j == height-1)
as otherwise the last line (j==height) isn't wriiten.
give it a try
rob
________________________________
From: tiff-bounces@lists.maptools.org [mailto:tiff-bounces@lists.maptools.org] On Behalf Of gis geo
Hi All,
I am learning and testing TIFF Lib, and have experienced the following problem:
I wish to write a 16-bit RGB imagery with separate planes, using the following codes
...
TIFFSetField(out, TIFFTAG_IMAGEWIDTH, width);
TIFFSetField(out, TIFFTAG_IMAGELENGTH, height);
TIFFSetField(out, TIFFTAG_BITSPERSAMPLE, 16);
TIFFSetField(out, TIFFTAG_SAMPLESPERPIXEL, 3);
TIFFSetField(out, TIFFTAG_PLANARCONFIG, 2);TIFFSetField(out, TIFFTAG_PHOTOMETRIC, 2);
TIFFSetField(out, TIFFTAG_COMPRESSION, COMPRESSION_NONE);TIFFSetField(out, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(out, 1));
for (j = 0; j < height; j++)
{
...TIFFWriteScanline(out, buf_r, j, 0);
TIFFWriteScanline(out, buf_g, j, 1);
TIFFWriteScanline(out, buf_b, j, 2);}
The output is fine and works. I can verify that.
But, after I have applied a 3*3 filter analysis, and I wish to output the same row-by-row data in this form, and the output tiff file is wrong:
for (j = 1; j < height-1; j++)
{
...if (j ==1 )
{TIFFWriteScanline(out, buf_r, j-1, 0);
TIFFWriteScanline(out, buf_g, j-1, 1);
TIFFWriteScanline(out, buf_b, j-1, 2);}
TIFFWriteScanline(out, buf_r, j, 0);
TIFFWriteScanline(out, buf_g, j, 1);
TIFFWriteScanline(out, buf_b, j, 2);if (j ==height-2 )
{TIFFWriteScanline(out, buf_r, j+1, 0);
TIFFWriteScanline(out, buf_g, j+1, 1);
TIFFWriteScanline(out, buf_b, j+1, 2);}
}I could not figure out why. This might to related to TIFFWriteScanline() and some expectation from the Tiff Lib that I did not specify.
THANK you in advance.
________________________________
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