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https://issues.apache.org/jira/browse/SANSELAN-72?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13252662#comment-13252662
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Damjan Jovanovic commented on SANSELAN-72:
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Looks like LZW decompression: the strips coming out of the decompressor have a
black line at the bottom.
> 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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