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[Octave-bug-tracker] [bug #47746] imwrite writes incorrect TIFF pixel va


From: Carnë Draug
Subject: [Octave-bug-tracker] [bug #47746] imwrite writes incorrect TIFF pixel values from uint8 array on i686-linux-gnu
Date: Tue, 03 May 2016 12:07:27 +0000
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Firefox/38.0 Iceweasel/38.8.0

Follow-up Comment #3, bug #47746 (project octave):

This snippet:


x = uint8 (0:255);
imwrite (x, "test.tif");


Should follow this code path (it's a single channel/color without alpha so an
Image of type  Magick::GrayscaleType) 
http://hg.savannah.gnu.org/hgweb/octave/file/58f5a6347851/libinterp/dldfcn/__magick_read__.cc#l1096

Can you print the value of grey at line 1111 to check if we are computing it
wrong or if it's an issue in GraphicsMagick?

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