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[Octave-bug-tracker] [bug #33612] Imread returns slightly different valu
From: |
Andrew Dougherty |
Subject: |
[Octave-bug-tracker] [bug #33612] Imread returns slightly different values than MATLAB |
Date: |
Tue, 21 Jun 2011 19:22:28 +0000 |
User-agent: |
Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.0; Trident/5.0) |
URL:
<http://savannah.gnu.org/bugs/?33612>
Summary: Imread returns slightly different values than MATLAB
Project: GNU Octave
Submitted by: adougher
Submitted on: Tue 21 Jun 2011 07:22:28 PM GMT
Category: None
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Incorrect Result
Status: None
Assigned to: None
Originator Name: Andrew Dougherty
Originator Email:
Open/Closed: Open
Discussion Lock: Any
Release: 3.4.0
Operating System: Microsoft Windows
_______________________________________________________
Details:
in Cygwin 1.7.9 (a recent fresh install including Octave 3.4.0 and
GraphicMagick-1.3.12)
Running the following using the first attached file:
M=imread('cars.jpeg');
M(1:10,1:10)
in both Octave and MATLAB(7.10.0.499 (R2010a)) produces
ans =
99 73 53 46 38 41 50 50 50 49
88 73 58 52 49 49 49 46 48 48
67 61 47 39 44 46 44 42 44 46
58 55 35 19 26 34 34 38 40 42
59 55 31 12 15 22 25 29 33 37
37 32 21 10 12 17 18 20 26 29
20 13 11 14 13 13 17 16 21 24
28 16 18 24 16 13 14 12 18 20
19 12 10 13 17 15 11 11 18 20
18 12 8 13 16 14 13 13 19 21
ans =
99 71 53 45 40 41 50 50 50 49
88 71 58 52 49 49 49 46 48 48
67 61 48 39 44 46 44 42 44 46
58 55 35 19 26 33 34 37 39 42
60 55 33 12 15 22 25 29 33 36
37 32 21 10 12 16 18 20 26 29
20 13 12 14 13 13 17 16 21 22
28 16 18 24 16 13 14 11 18 20
19 12 10 13 17 15 11 11 20 20
18 11 8 13 16 14 13 13 19 21
Respectively.
These slight differences exist for other files I tested as well, but hopefully
this example will suffice in demonstrating the problem.
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Tue 21 Jun 2011 07:22:28 PM GMT Name: cars.jpg Size: 35kB By:
adougher
<http://savannah.gnu.org/bugs/download.php?file_id=23547>
_______________________________________________________
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<http://savannah.gnu.org/bugs/?33612>
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