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From "Damjan Jovanovic (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SANSELAN-72) Incorrect reading TIFF file
Date Fri, 13 Apr 2012 16:41:18 GMT

    [ https://issues.apache.org/jira/browse/SANSELAN-72?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13253524#comment-13253524
] 

Damjan Jovanovic commented on SANSELAN-72:
------------------------------------------

It wasn't LZW compression, but calculation of the expected size for decompressed data.
Fixed by commit 1325834 in the latest SVN.

The grey background is still a problem.

                
> Incorrect reading TIFF file
> ---------------------------
>
>                 Key: SANSELAN-72
>                 URL: https://issues.apache.org/jira/browse/SANSELAN-72
>             Project: Commons Sanselan
>          Issue Type: Bug
>          Components: Format: PNG, Format: TIFF
>    Affects Versions: 1.x
>            Reporter: VVD
>         Attachments: in.png, in.tif, out-png-IM.png, out-tif.png
>
>
> I found 2 bugs.
> I have tif file in.tif.
> 1. After convert it to png (bmp, tga, etc) by Sanselan it getting horizontal lines.
> {code}
> Sanselan.writeImage(Sanselan.getBufferedImage(new File("in.tif")), new File("out-tif.png"),
ImageFormat.IMAGE_FORMAT_PNG, null);
> {code}
> gwenview, eog, kolourpaint, gimp, etc show in.tif without lines and out.png with lines.
> For example 1st line at ~860 points from top and in full width of picture.
> 2. After convert it to png by convert utility from ImageMagic, and then convert it to
png (bmp, tga, etc) by Sanselan it became "gray" - all white pixels become gray.
> {code}$ convert in.tif in.png{code}
> {code}
> Sanselan.writeImage(Sanselan.getBufferedImage(new File("in.png")), new File("out-png-IM.png"),
ImageFormat.IMAGE_FORMAT_PNG, null);
> {code}
> gwenview, eog, kolourpaint, gimp, etc show in.png as black and white, but out-png-IM.png
as black and gray.
> I'll attach all 4 files.

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