[Image-SIG] Unable to read V5 bitmap files

[feroze dawood]

Hi!

I have a bitmap file written by new versions of windows. These files seem
to have the BITMAPV5HEADER header, as documented in this wikipedia
article...

http://en.wikipedia.org/wiki/BMP_file_format

The image metadata is as follows...

--

sh:~/home/user$ identify -verbose badbmp.bmpImage: badbmp.bmp
  Format: BMP (Microsoft Windows bitmap image)
  Class: DirectClass
  Geometry: 940x705+0+0
  Units: PixelsPerCentimeter
  Type: TrueColorMatte
  Endianess: Undefined
  Colorspace: RGB
  Depth: 8-bit
  Channel depth:
    red: 8-bit
    green: 8-bit
    blue: 8-bit
    alpha: 1-bit
  Channel statistics:
    Red:
      min: 7 (0.027451)
      max: 255 (1)
      mean: 82.3111 (0.322788)
      standard deviation: 42.3517 (0.166085)
      kurtosis: 9.21784
      skewness: 2.94025
    Green:
      min: 7 (0.027451)
      max: 255 (1)
      mean: 80.6959 (0.316454)
      standard deviation: 43.208 (0.169443)
      kurtosis: 8.72161
      skewness: 2.84078
    Blue:
      min: 5 (0.0196078)
      max: 255 (1)
      mean: 76.912 (0.301616)
      standard deviation: 45.1296 (0.176979)
      kurtosis: 7.82117
      skewness: 2.6619
    Alpha:
      min: 255 (1)
      max: 255 (1)
      mean: 255 (1)
      standard deviation: 0 (0)
      kurtosis: 0
      skewness: 0
  Image statistics:
    Overall:
      min: 5 (0.0196078)
      max: 255 (1)
      mean: 123.73 (0.485215)
      standard deviation: 84.6884 (0.332111)
      kurtosis: -1.16829
      skewness: 0.805031
  Alpha: rgba(52,52,52,0)   #34343400
  Rendering intent: Undefined
  Chromaticity:
    red primary: (-nan,-nan)
    green primary: (-nan,-nan)
    blue primary: (-nan,-nan)
    white point: (0,0)
  Interlace: None
  Background color: white
  Border color: rgba(223,223,223,1)
  Matte color: grey74
  Transparent color: none
  Compose: Over
  Page geometry: 940x705+0+0
  Dispose: Undefined
  Iterations: 0
  Compression: Undefined
  Orientation: Undefined
  Properties:
    date:create: 2013-05-29T13:41:17-07:00
    date:modify: 2013-05-29T13:41:17-07:00
    signature: 06a0f3720396f746fa94ee4918f3150c9bd4931ff21e9bed66d8202b4824e215
  Artifacts:
    verbose: true
  Tainted: False
  Filesize: 2.651MB
  Number pixels: 663KB
  Pixels per second: 66.27MB
  User time: 0.010u
  Elapsed time: 0:01.010
  Version: ImageMagick 6.6.0-4 2012-08-17 Q16 http://www.imagemagick.org

--


My code:


--

imageBytes = Nonewith open(fileName, 'rb') as f:
    imageBytes = f.read()

rawImage = Image.open(StringIO.StringIO(imageBytes))


--

This is what I get when I run it...


  File "/home/user/__init__.py", line 149, in convert_file_adv
    rawImage = Image.open(StringIO.StringIO(imageBytes))
  File "/usr/lib/python2.7/dist-packages/PIL/Image.py", line 1965, in open
    return factory(fp, filename)
  File "/usr/lib/python2.7/dist-packages/PIL/ImageFile.py", line 91, in __init__
    self._open()
  File "/usr/lib/python2.7/dist-packages/PIL/BmpImagePlugin.py", line
170, in _open
    self._bitmap(offset=offset)
  File "/usr/lib/python2.7/dist-packages/PIL/BmpImagePlugin.py", line
102, in _bitmap
    raise IOError("Unsupported BMP header type (%d)" % len(s))IOError:
Unsupported BMP header type (124)


--

Can someone tell how to get PIL to read these files?


FYI I am using PIL==1.1.7 on linux.

A lot of our customers have these files, so I have to find a
workaround for them.


Thanks,


feroze.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/image-sig/attachments/20130530/f663db21/attachment.html>