Legacy ImageMagick Discussions Archive

Hi,

I am trying to convert a tiff to a jpg and png. I receive two errors/warnings when I execute a convert command on the image in question.

convert Amb_A7_9A_L2_25.tif Amb_A7_9A_L2.jpg

convert: Amb_A7_9A_L2_25.tif: unknown field with tag 37724 (0x935c) encountered. `TIFFReadDirectory' @ tiff.c/TIFFWarnings/526.

convert: Compression algorithm does not support random access. `Amb_A7_9A_L2_25.tif' @ tiff.c/TIFFErrors/324.

Neither a jpg or png is successfully generated with the original image. However these errors go away if I open the original in photoshop, save as a tiff removing the layers and using NO compression. (The original uses LZW) After these changes to the original the jpg is successfully generated but the png is not (I suspect this may be due to a CMYK/RGB shift).

Can I convert this original tiff into a png and jpg using IM?

The original file is located here.
http://www.yousendit.com/download/dVlxY ... V3gzZUE9PQ

My version of IM:
Version: ImageMagick 6.5.1-8 2009-04-26 Q16 OpenMP http://www.imagemagick.org

Any help is appreciated.
Thanks
Tom

The problem you reported is fixed in the latest ImageMagick release, 6.5.2-1.

I downloaded the latest IM today and tried again but I still have the same issues. Am I missing something here.

convert Amb_A7_9A_L2_25.tif Amb_A7_9A_L2_25.jpg

convert: Amb_A7_9A_L2_25.tif: unknown field with tag 37724 (0x935c) encountered. `TIFFReadDirectory' @ tiff.c/TIFFWarnings/525.
convert: Compression algorithm does not support random access. `Amb_A7_9A_L2_25. tif' @ tiff.c/TIFFErrors/323.

convert -version

Version: ImageMagick 6.5.2-0 2009-05-01 Q16 OpenMP http://www.imagemagick.org
Copyright: Copyright (C) 1999-2009 ImageMagick Studio LLC

Version: ImageMagick 6.5.2-0 2009-05-01 Q16 OpenMP http://www.imagemagick.org

You need 6.5.2-1.

That did fix the "random access" error and it now generates the jpg image. However the resulting png is still not correct. The resulting png only has a black square on a white or transparent background. Is there some color correction that is required to make the conversion?

Version: ImageMagick 6.5.2-2 2009-05-05 Q16 OpenMP http://www.imagemagick.org
Copyright: Copyright (C) 1999-2009 ImageMagick Studio LLC

Thanks

Try this command:

convert Amb_A7_9A_L2_25.tif -colorspace rgb +matte Amb_A7_9A_L2.png

You have a fifth channel that ImageMagick is interpretting as an alpha / matte channel which is predominately transparent.

It seems I've got the similat problem with my TIFF, which was saved by PS CS3 with compression LZW and Pixel Order - per Channel.
ATM I'm using "ImageMagick 6.5.7-0 2009-10-15 Q16 OpenMP", but "Compression algorithm does not support random access" error isn't disappeared.

Here is "identify -verbose" command log for it:

Code: Select all

Image: E:\TestData\TIFFs\WE16_HK1T_0288_02X_D_001.tif
  Format: TIFF (Tagged Image File Format)
  Class: DirectClass
  Geometry: 4000x3071+0+0
  Resolution: 300x300
  Print size: 13.3333x10.2367
  Units: PixelsPerInch
  Type: ColorSeparation
  Base type: ColorSeparation
  Endianess: MSB
  Colorspace: CMYK
  Depth: 8-bit
  Channel depth:
    cyan: 8-bit
    magenta: 8-bit
    yellow: 8-bit
    black: 8-bit
  Channel statistics:
    cyan:
      min: 0 (0)
      max: 255 (1)
      mean: 1.14853 (0.00450403)
      standard deviation: 13.1028 (0.0513836)
      kurtosis: 206.55
      skewness: 13.8585
    magenta:
      min: 0 (0)
      max: 255 (1)
      mean: 1.40847 (0.0055234)
      standard deviation: 14.0488 (0.0550934)
      kurtosis: 141.417
      skewness: 11.492
    yellow:
      min: 0 (0)
      max: 255 (1)
      mean: 2.10764 (0.00826526)
      standard deviation: 18.6173 (0.0730089)
      kurtosis: 93.0889
      skewness: 9.48966
    black:
      min: 0 (0)
      max: 248 (0.972549)
      mean: 0.721727 (0.0028303)
      standard deviation: 10.9702 (0.0430205)
      kurtosis: 303.67
      skewness: 17.1071
  Image statistics:
    Overall:
      min: 0 (0)
      max: 255 (1)
      mean: 1.07727 (0.0042246)
      standard deviation: 12.9496 (0.0507829)
      kurtosis: 196.574
      skewness: 13.6341
  Total ink density: 389%
  Rendering intent: Undefined
  Interlace: None
  Background color: white
  Border color: cmyk(223,223,223,0)
  Matte color: grey74
  Transparent color: black
  Compose: Over
  Page geometry: 4000x3071+0+0
  Dispose: Undefined
  Iterations: 0
  Compression: LZW
  Orientation: TopLeft
  Properties:
    date:create: 2009-10-19T11:32:25+03:00
    date:modify: 2009-10-19T11:32:26+03:00
    dc:format: image/tiff
    exif:ColorSpace: -1
    exif:NativeDigest: 36864,40960,40961,37121,37122,40962,40963,37510,40964,36867,36868,33434,33437,34850,34852,34855,3
4856,37377,37378,37379,37380,37381,37382,37383,37384,37385,37386,37396,41483,41484,41486,41487,41488,41492,41493,41495,4
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    exif:PixelXDimension: 4000
    exif:PixelYDimension: 3071
    photoshop:ColorMode: 4
    photoshop:History:
    signature: eee9e77e7fb1816646f9d6e4a62c6e26814566424ef13c3463c66265da59357e
    stRef:documentID: uuid:B6CBE790AF5211DE9C37DC434F6A0575
    stRef:instanceID: uuid:B6CBE791AF5211DE9C37DC434F6A0575
    tiff:Compression: 5
    tiff:ImageLength: 3071
    tiff:ImageWidth: 4000
    tiff:NativeDigest: 256,257,258,259,262,274,277,284,530,531,282,283,296,301,318,319,529,532,306,270,271,272,305,315,3
3432;B266D2A17943907DF5A328E6F80C7CE9
    tiff:photometric: separated
    tiff:PhotometricInterpretation: 5
    tiff:PlanarConfiguration: 2
    tiff:rows-per-strip: 65
    tiff:SamplesPerPixel: 4
    tiff:software: Adobe Photoshop CS3 Windows
    tiff:timestamp: 2009:10:19 11:32:04
    xap:CreateDate: 2009-10-19T11:32:04+03:00
    xap:CreatorTool: Adobe Photoshop CS3 Windows
    xap:MetadataDate: 2009-10-19T11:32:04+03:00
    xap:ModifyDate: 2009-10-19T11:32:04+03:00
    xapMM:DocumentID: uuid:25D7B20A89BCDE118A749C8EC9D996BC
    xapMM:InstanceID: uuid:26D7B20A89BCDE118A749C8EC9D996BC
  Clipping path:
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  Profiles:
    Profile-8bim: 21316 bytes
    Profile-iptc: 8 bytes
      unknown[2,0]:
    Profile-xmp: 15571 bytes
  Artifacts:
    verbose: true
  Tainted: False
  Filesize: 19.75MiB
  Number pixels: 11.71MiB
  Pixels per second: 150.2MiB
  User time: 0.078u
  Elapsed time: 0:01.077
  Version: ImageMagick 6.5.7-0 2009-10-15 Q16 OpenMP http://www.imagemagick.org
identify: Compression algorithm does not support random access. `E:\TestData\TIFFs\WE16_HK1T_0288_02X_D_001.tif' @ tiff.
c/TIFFErrors/493.

You can download the image example here: http://dc104.2shared.com/download/85303 ... 0-364e1741
Your help will be very much appreciated. TIA.

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