Opened 22 years ago
Last modified 22 years ago
#161 closed defect (fixed)
GDAL bug with black/white TIFF
Reported by: | Markus Neteler | Owned by: | warmerdam |
---|---|---|---|
Priority: | high | Milestone: | |
Component: | default | Version: | unspecified |
Severity: | normal | Keywords: | |
Cc: |
Description
Frank, sorry for another bug report. Today I tried to import a TIFF/TFW file: The TIFF driver seems to be confused with that format. tiffinfo 0601020.tif 0601020.tif: Warning, unknown field with tag 33550 (0x830e) ignored. 0601020.tif: Warning, unknown field with tag 33922 (0x8482) ignored. TIFF Directory at offset 0x8 Subfile Type: (0 = 0x0) Image Width: 10393 Image Length: 9023 Resolution: 400, 400 pixels/inch Bits/Sample: 1 Compression Scheme: CCITT RLE Photometric Interpretation: min-is-white Software: "Arc/Info" Samples/Pixel: 1 Rows/Strip: 7 Planar Configuration: single image plane gdal.velocet.ca/pub/incoming 0601020.tif 0601020.tfw 0601020_gdalbug.gif <- screenshot (left GDAL, right XV) Perhaps you could look into this. Thanks Markus
Change History (3)
comment:2 by , 22 years ago
Markus, Thanks for the bug report and the file. It seems that the bitmap is being unpacked backwards within the byte. I will dig into this. Best regards,
comment:3 by , 22 years ago
Markus, The problem was that 1bit files have byte aligned scanlines and I wasn't accounting for this. I have corrected gdal/frmts/gtiff/geotiff.cpp and now the files looks fine. Thanks for submitting it!
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