Creating Thumbnails for 16 bit imagery comes black
Posted: 2012-11-12T03:08:52-07:00
I'm trying to generate thumbnails for 16bit TIFF image with the following command.
[convert -endian msb -depth 16 -colorspace sRGB D:\po_356191_bgrn_0000000.tif -thumbnail 250x250 -set colorspace RGB d:\1.jpg]
The command generates completely black thumbnails.
The identify verbose command gives the following results.
Could anyone help please?
[convert -endian msb -depth 16 -colorspace sRGB D:\po_356191_bgrn_0000000.tif -thumbnail 250x250 -set colorspace RGB d:\1.jpg]
The command generates completely black thumbnails.
The identify verbose command gives the following results.
Code: Select all
identify -verbose d:\po_356191_bgrn_0000000.tif
Image: d:\po_356191_bgrn_0000000.tif
Format: TIFF (Tagged Image File Format)
Class: DirectClass
Geometry: 13449x28427+0+0
Resolution: 300x300
Print size: 44.83x94.7567
Units: PixelsPerInch
Type: TrueColorAlpha
Base type: TrueColor
Endianess: MSB
Colorspace: sRGB
Depth: 16-bit
Channel depth:
red: 16-bit
green: 16-bit
blue: 16-bit
alpha: 16-bit
Channel statistics:
Red:
min: 26 (0.000396735)
max: 1876 (0.0286259)
mean: 478.597 (0.00730292)
standard deviation: 123.879 (0.00189027)
kurtosis: 1.34419
skewness: 1.00039
Green:
min: 1 (1.5259e-005)
max: 2047 (0.0312352)
mean: 703.48 (0.0107344)
standard deviation: 216.756 (0.00330748)
kurtosis: 0.919118
skewness: 0.879568
Blue:
min: 1 (1.5259e-005)
max: 1856 (0.0283207)
mean: 454.483 (0.00693497)
standard deviation: 156.877 (0.00239379)
kurtosis: 0.263127
skewness: 0.410018
Alpha:
min: 1 (1.5259e-005)
max: 2047 (0.0312352)
mean: 1006.36 (0.0153561)
standard deviation: 295.642 (0.00451121)
kurtosis: 8.02289
skewness: -0.20936
Image statistics:
Overall:
min: 1 (1.5259e-005)
max: 65534 (0.999985)
mean: 16541.3 (0.252404)
standard deviation: 208.772 (0.00318566)
kurtosis: 7.23868e+008
skewness: 2.69885e+006
Rendering intent: Perceptual
Gamma: 0.454545
Chromaticity:
red primary: (0.64,0.33)
green primary: (0.3,0.6)
blue primary: (0.15,0.06)
white point: (0.3127,0.329)
Interlace: None
Background color: white
Border color: srgba(223,223,223,1)
Matte color: grey74
Transparent color: none
Compose: Over
Page geometry: 13449x28427+0+0
Dispose: Undefined
Iterations: 0
Compression: None
Orientation: TopLeft
Properties:
comment: "GeoEye"
date:create: 2012-11-12T10:29:51+04:00
date:modify: 2009-08-07T19:51:18+04:00
signature: 40822d4811a08a0f9c075b374e3fdd062bac78f7a1bb5ea6bc826cb42c8e6172
tiff:alpha: unassociated
tiff:copyright: "(c) GeoEye"
tiff:endian: msb
tiff:photometric: RGB
tiff:rows-per-strip: 128
tiff:timestamp: 2009:08:07 15:44:12
Artifacts:
filename: d:\po_356191_bgrn_0000000.tif
verbose: true
Tainted: False
Filesize: 3.0585GB
Number pixels: 382.3M
Pixels per second: 4.415MB
User time: 11.497u
Elapsed time: 1:27.586
Version: ImageMagick 6.8.0-4 2012-10-30 Q16 http://www.imagemagick.org
identify.exe: Unknown field with tag 33550 (0x830e) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/824.
identify.exe: Unknown field with tag 33922 (0x8482) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/824.
identify.exe: Unknown field with tag 34735 (0x87af) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/824.
identify.exe: Unknown field with tag 34737 (0x87b1) encountered. `TIFFReadDirectory' @ warning/tiff.c/TIFFWarnings/824.