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[Octave-bug-tracker] [bug #56169] images of class double or single fail
From: |
anonymous |
Subject: |
[Octave-bug-tracker] [bug #56169] images of class double or single fail to convert to class uint8 |
Date: |
Fri, 19 Apr 2019 04:02:07 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:66.0) Gecko/20100101 Firefox/66.0 |
URL:
<https://savannah.gnu.org/bugs/?56169>
Summary: images of class double or single fail to convert to
class uint8
Project: GNU Octave
Submitted by: None
Submitted on: Fri 19 Apr 2019 08:02:06 AM UTC
Category: Octave Function
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: None
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 5.1.0
Operating System: Microsoft Windows
_______________________________________________________
Details:
>> lab = rgb2lab(im);
>> im(1:10,1:10,1)
ans =
21 21 21 21 22 23 22 18 20 23
24 23 21 21 21 20 20 19 21 22
23 23 22 21 21 20 20 20 21 20
25 23 21 21 21 22 22 22 23 24
21 21 21 21 21 22 20 22 23 24
25 22 21 21 21 21 21 21 22 23
23 21 21 22 22 22 23 20 20 23
25 24 24 22 22 22 23 23 24 24
24 24 22 22 21 21 22 20 22 24
26 23 21 21 22 22 20 19 20 23
>> lab(1:10,1:10,1)
ans =
34.908 32.971 32.649 31.366 32.296 32.911 31.653 30.946
31.108 31.565
34.340 32.965 32.762 31.892 31.570 31.603 31.925 31.697
31.745 31.451
34.525 33.343 32.674 32.483 31.513 32.514 32.784 32.784
32.428 31.811
34.362 33.343 32.064 32.271 31.513 32.296 31.749 31.749
33.128 32.725
34.157 33.941 32.647 32.807 31.835 31.216 32.191 31.216
32.210 33.102
34.629 33.428 31.686 31.628 32.103 31.399 31.686 30.410
31.711 32.965
34.954 33.460 29.527 31.314 31.595 31.274 31.016 31.208
31.589 32.533
36.233 33.960 33.314 32.399 31.805 32.019 32.478 31.887
32.614 33.102
36.209 34.604 33.051 31.694 32.374 31.456 31.481 31.165
31.102 31.271
35.565 35.274 33.140 32.807 31.917 30.694 32.135 31.511
32.079 32.424
>> a = im2uint8(lab);
>> size(a)
ans =
308 168 3
>> class(a)
ans = uint8
>> a(1:10,1:10,1)
ans =
255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255
255 255 255 255 255 255 255 255 255 255
>>
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- [Octave-bug-tracker] [bug #56169] images of class double or single fail to convert to class uint8,
anonymous <=