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From "Gary Lucas (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (IMAGING-194) Tiff with JPEG,Zip compression fails to decompress
Date Mon, 30 Oct 2017 19:39:00 GMT

    [ https://issues.apache.org/jira/browse/IMAGING-194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16225617#comment-16225617
] 

Gary Lucas commented on IMAGING-194:
------------------------------------

The compression code 7 is not even listed in TiffConstants.java.  TiffConstants does include
TIFF_COMPRESSION_JPEG = 6, though neither format is decoded.    I've seen Code 7 used in many
satellite images.

The documentation seems a bit sketchy on this issue, though I found some at 

[#ftp://ftp.sgi.com/graphics/tiff/TTN2.draft.txt]

> Tiff with JPEG,Zip compression fails to decompress
> --------------------------------------------------
>
>                 Key: IMAGING-194
>                 URL: https://issues.apache.org/jira/browse/IMAGING-194
>             Project: Commons Imaging
>          Issue Type: Improvement
>          Components: Format: TIFF
>    Affects Versions: 1.0
>            Reporter: Satya Deep Maheshwari
>
> Tiff with JPEG, Zip compression  fails to decompress with the below exception:
> {code}
> org.apache.commons.imaging.ImageReadException: Tiff: unknown/unsupported compression:
7
> 	at org.apache.commons.imaging.formats.tiff.datareaders.DataReader.decompress(DataReader.java:215)
> 	at org.apache.commons.imaging.formats.tiff.datareaders.DataReaderStrips.readImageData(DataReaderStrips.java:210)
> 	at org.apache.commons.imaging.formats.tiff.TiffImageParser.getBufferedImage(TiffImageParser.java:650)
> 	at org.apache.commons.imaging.formats.tiff.TiffDirectory.getTiffImage(TiffDirectory.java:157)
> 	at org.apache.commons.imaging.formats.tiff.TiffImageParser.getBufferedImage(TiffImageParser.java:463)
> 	at org.apache.commons.imaging.Imaging.getBufferedImage(Imaging.java:1407)
> 	at org.apache.commons.imaging.Imaging.getBufferedImage(Imaging.java:1370)
> {code}
> From the [documentation|https://commons.apache.org/proper/commons-imaging/formatsupport.html]
, it seems this compression format is not supported. Excerpt from the document below:
> {quote}
> Supported through version 6.0. TIFFs is a open-ended container format, so it's not possible
to support every possibly variation. Supports Bi-Level, Palette/Indexed, RGB, CMYK, YCbCr,
CIELab and LOGLUV images. Supports reading and writing LZW, CCITT Modified Huffman/Group 3/Group
4, and Packbits/RLE compression. Notably missing other forms of compression though, including
JPEG. Supports reading Tiled images.
> {quote}
> This ticket is logged to add JPEG/Zip compression format support.



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