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Unable to read 16bit tiff #1828
Description
What did you do?
im = Image.open("afc1981004_046_02.tif")
What did you expect to happen?
It opens the tiff
What actually happened?
it threw an error
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Users/jscancella/development/repos/derivative-scripts/ENV2/lib/python3.5/site-packages/PIL/Image.py", line 2309, in open
% (filename if filename else fp))
OSError: cannot identify image file <_io.StringIO object at 0x100a35dc8>What versions of Pillow and Python are you using?
3.2.0
Please include code that reproduces the issue and whenever possible, an image that demonstrates the issue. The best reproductions are self-contained scripts with minimal dependencies.
unfortunately it won't let me upload the file, but I would be happy to send it to you in an email.
from PIL import Image
im = Image.open("afc1981004_046_02.tif")output of identify
[jscancella]$ identify -verbose afc1981004_046_02.tiff
Image: /Users/jscancella/work/images/afc1981004_046_02.tiff
Format: TIFF (Tagged Image File Format)
Mime type: image/tiff
Class: DirectClass
Geometry: 5046x3426+0+0
Resolution: 3600x3600
Print size: 1.40167x0.951667
Units: PixelsPerInch
Type: TrueColor
Base type: TrueColor
Endianess: LSB
Colorspace: sRGB
Depth: 16-bit
Channel depth:
red: 16-bit
green: 16-bit
blue: 16-bit
Channel statistics:
Pixels: 17287596
Red:
min: 5989 (0.0913863)
max: 65535 (1)
mean: 13145.6 (0.200588)
standard deviation: 9808.18 (0.149663)
kurtosis: 4.09231
skewness: 2.05007
entropy: 0.877932
Green:
min: 6291 (0.0959945)
max: 65535 (1)
mean: 13471.8 (0.205566)
standard deviation: 10479.2 (0.159902)
kurtosis: 3.88293
skewness: 2.05712
entropy: 0.859453
Blue:
min: 135 (0.00205997)
max: 65055 (0.992676)
mean: 14642.6 (0.223432)
standard deviation: 12033.2 (0.183615)
kurtosis: 2.73516
skewness: 1.87165
entropy: 0.887947
Image statistics:
Overall:
min: 135 (0.00205997)
max: 65535 (1)
mean: 13753.3 (0.209862)
standard deviation: 10813.7 (0.165007)
kurtosis: 3.68086
skewness: 2.02482
entropy: 0.875111
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)
Background color: white
Border color: srgb(223,223,223)
Matte color: grey74
Transparent color: black
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 5046x3426+0+0
Dispose: Undefined
Iterations: 0
Scene: 0 of 2
Compression: None
Orientation: TopLeft
Properties:
date:create: 2016-04-12T12:33:10-04:00
date:modify: 2016-04-12T12:25:42-04:00
exif:DateTimeDigitized: 2015:06:10 16:50:56
exif:DateTimeOriginal: 2015:06:10 16:50:56
exif:ISOSpeedRatings: 35
exif:LightSource: 255
signature: 920180f74560c61b2ccea659d3d8ae4d4479fe351350e905be2784812dc57e09
tiff:alpha: unspecified
tiff:artist: Library of Congress;Backstage Library Works
tiff:endian: lsb
tiff:make: Phase One
tiff:model: IQ180
tiff:photometric: RGB
tiff:rows-per-strip: 1024
tiff:software: Capture One 8 Windows
tiff:timestamp: 2015:07:28 20:13:56
Profiles:
Profile-icc: 544 bytes
Profile-iptc: 36 bytes
unknown[1,0]:
City[1,90]: 0x00000000: 254700 -%
unknown[2,0]:
Created Date[2,55]: 20150610
Artifacts:
filename: /Users/jscancella/work/images/afc1981004_046_02.tiff
verbose: true
Tainted: False
Filesize: 103.8MB
Number pixels: 17.29M
Pixels per second: 1.08047TB
User time: 0.000u
Elapsed time: 0:01.000
Version: ImageMagick 6.9.2-8 Q16 x86_64 2015-12-06 http://www.imagemagick.org
Image: /Users/jscancella/work/images/afc1981004_046_02.tiff
Format: TIFF (Tagged Image File Format)
Mime type: image/tiff
Class: DirectClass
Geometry: 160x109+0+0
Units: PixelsPerInch
Type: TrueColor
Base type: TrueColor
Endianess: LSB
Colorspace: sRGB
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Channel statistics:
Pixels: 17440
Red:
min: 20 (0.0784314)
max: 247 (0.968627)
mean: 51.9957 (0.203905)
standard deviation: 35.564 (0.139467)
kurtosis: 3.9248
skewness: 1.93113
entropy: 0.77921
Green:
min: 24 (0.0941176)
max: 252 (0.988235)
mean: 53.4612 (0.209652)
standard deviation: 38.129 (0.149525)
kurtosis: 3.28637
skewness: 1.86889
entropy: 0.748883
Blue:
min: 21 (0.0823529)
max: 255 (1)
mean: 57.9004 (0.22706)
standard deviation: 44.4001 (0.174118)
kurtosis: 2.62465
skewness: 1.78744
entropy: 0.793156
Image statistics:
Overall:
min: 20 (0.0784314)
max: 255 (1)
mean: 54.4524 (0.213539)
standard deviation: 39.5389 (0.155055)
kurtosis: 3.45284
skewness: 1.90731
entropy: 0.77375
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)
Background color: white
Border color: srgb(223,223,223)
Matte color: grey74
Transparent color: black
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 160x109+0+0
Dispose: Undefined
Iterations: 0
Scene: 1 of 2
Compression: None
Orientation: TopLeft
Properties:
date:create: 2016-04-12T12:33:10-04:00
date:modify: 2016-04-12T12:25:42-04:00
signature: 0020992c1769fa75d5b8286edb6b1256a35cd7a1d4cb77c960b5cc26b95bd87e
tiff:alpha: unspecified
tiff:endian: lsb
tiff:photometric: RGB
tiff:rows-per-strip: 17
tiff:subfiletype: REDUCEDIMAGE
Artifacts:
filename: /Users/jscancella/work/images/afc1981004_046_02.tiff
verbose: true
Tainted: False
Filesize: 103.8MB
Number pixels: 17.4K
Pixels per second: 169.3MB
User time: 0.000u
Elapsed time: 0:01.000
Version: ImageMagick 6.9.2-8 Q16 x86_64 2015-12-06 http://www.imagemagick.org
identify: Wrong data type 3 for "PixelXDimension"; tag ignored. `TIFFReadCustomDirectory' @ warning/tiff.c/TIFFWarnings/887.
identify: Wrong data type 3 for "PixelYDimension"; tag ignored. `TIFFReadCustomDirectory' @ warning/tiff.c/TIFFWarnings/887.
identify: Incompatible type for "FileSource"; tag ignored. `TIFFFetchNormalTag' @ warning/tiff.c/TIFFWarnings/887.
identify: Incompatible type for "SceneType"; tag ignored. `TIFFFetchNormalTag' @ warning/tiff.c/TIFFWarnings/887.
Activity
wiredfool commentedon Apr 12, 2016
Sorry, it's a limitation of Pillow. We don't have the ability to read multichannel images that are more than 8 bit per channel.
acdha commentedon Apr 12, 2016
@wiredfool Did that change over time? I was under the impression that it was intended to be supported but there were gaps for some of the option permutations.
wiredfool commentedon Apr 12, 2016
It's never been supported. (at least, back to PIL 1.1.6)
There are two core image representations, 8bpp and 32bpp. The 8 can be used in several ways, each single channel, and the 32 can be used as either 4 8 bit channels or 1 16 or 32 bit channel. These are defined in
libImaging/Storage.cApart from that, there are many image formats that mapped onto those 8 or 32bit pixels, but they're a mapping, not a bit copy. (e.g., mode
1images, black and white, are represented as 8 bits per pixel, 0 or 255). These are defined inlibImaging/Unpack.candlibImaging/Pack.c.There was someone interested in doing the work to add multi-channel high bit depth images, but that fell through for time or funding reasons.
wiredfool commentedon May 5, 2016
Closing, see #1888 for potential future developments