Re: tiff images // tiff:photometric: min-is-white // causes pixel values to be inverted ( using latest release // 6.5.4-10 2009-08-10 )

Scott Callaway <[email protected]> Tue, 1 Sep 2009 17:07:15 -0400
Newsgroups gmane.comp.video.image-magick.bugs
Message-ID <[email protected]>
Please give me feedback on the 'min-is-white' behavior that changed from ImageMagick 6.3.6 to 6.5.4-10.

ImageJ currently behaves like ImageMagick 6.3.6 -- the Inverted LUT does not change the pixel values, both images in ImageJ have the same historgram.  ImageJ only flips the pixel values for visualization. 

GIMP currently behaves like ImageMagick 6.5.4-10 -- the Inverted LUT changes the actual pixel values. Using GIMP, the histogram for the two images are 'mirrors' of each other.

Thanks in advance.

> -----Original Message-----
> From: Scott Callaway
> Sent: Wednesday, August 19, 2009 4:26 PM
> To: '[email protected]'; magick-
> [email protected]
> Subject: RE: [Magick-bugs] tiff images // tiff:photometric: min-is-
> white // causes pixel values to be inverted ( using latest release //
> 6.5.4-10 2009-08-10 )
> 
> The two images below should allow you to reproduce the issue.
> I believe the only difference between the two images is a single byte
> (0 vs 1) that indicates an inverted LUT.
> 
> http://www.huntermikic.com/imagemagick/imagemagick_8bitgrayscale_130x13
> 0_.tif
> http://www.huntermikic.com/imagemagick/imagemagick_8bitgrayscale_130x13
> 0_Inverted_LUT.tif
> 
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]
> Sent: Wednesday, August 19, 2009 9:50 AM
> To: [email protected]; Scott Callaway
> Subject: Re: [Magick-bugs] tiff images // tiff:photometric: min-is-
> white // causes pixel values to be inverted ( using latest release //
> 6.5.4-10 2009-08-10 )
> 
> Post a URL to your TIFF images.  We need to download them and reproduce
> the
> problem before we can comment.