AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

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1994.02.08 00:55 "Photometric Interpretation question", by Doug Vander Wilt
1994.02.11 15:47 "Re: Photometric Interpretation question", by Derek Jean-Baptiste

1994.02.08 00:55 "Photometric Interpretation question", by Doug Vander Wilt

I need independent advice on the correctness of an image from a Contex FSS5000 scanner and CADImage/SCAN ver. 2.3 for HP-UX. The scanner works great, but the images are prone to misinterpretation due to MINISBLACK. I've seen 3 different applications view these images correctly (white background) but 1 that brings it up with black background.

Based on the TIFF 6.0 spec, page 50, paragraphs 3 & 4, I plan to copy these images and just change the header to PHOTOMETRIC_MINISWHITE. But before I convert many-many megabytes, I want to be sure this is the "poli-TIFF-ly correct" thing to do. Info & sample are attached.

Thanks,

Doug Vander Wilt
Honeywell MICRO SWITCH Division
dwv@cadnet.micro.honeywell.com

$ tiffinfo dummies.tif

TIFF Directory at offset 0x8
    Subfile Type: (0 = 0x0)
    Image Width: 1442 Image Length: 690
    Resolution: 200, 200
    Bits/Sample: 1
    Compression Scheme: CCITT Group 4 facsimile encoding
    Photometric Interpretation: min-is-black
    Thresholding: bilevel art scan
    FillOrder: msb-to-lsb
    Orientation: row 0 top, col 0 lhs
    Samples/Pixel: 1
    Rows/Strip: 512
    Min Sample Value: 0
    Max Sample Value: 1
    Planar Configuration: single image plane