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[Octave-bug-tracker] [bug #49130] uint8 images are not shown correctly b

From: Rik
Subject: [Octave-bug-tracker] [bug #49130] uint8 images are not shown correctly by imshow with gnuplot
Date: Mon, 19 Sep 2016 20:16:17 +0000 (UTC)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0

Update of bug #49130 (project octave):

              Item Group:              Regression => Incorrect Result       
                  Status:               Confirmed => None                   


Follow-up Comment #2:

There are probably multiple problems here.  A simple test example for logical
inputs, i.e., black and white is.

close all
graphics_toolkit gnuplot
I = (rand (64,64) >= 0.5);
imshow (I)

A test case for uint8 input is

close all
graphics_toolkit gnuplot
I = uint8 (255*rand (64,64));
imshow (I)

In each case, I get an all white plot with gnuplot 5.0.1.  With gnuplot 4.6.6
I get an all black plot.  This is for tip 

parent: 22513:12ea89cb1237 tip
 Correct gnuplot toolkit color processing for patch edgecolor (bug #49108)

If I use Octave 4.0.3, I still don't get the correct result if I use gnuplot
5.0.1, but gnuplot 4.6.6 now works.


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