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[Octave-bug-tracker] [bug #60946] bug in imresize implementation of Octa
From: |
Rick T |
Subject: |
[Octave-bug-tracker] [bug #60946] bug in imresize implementation of Octave image package |
Date: |
Mon, 19 Jul 2021 20:57:42 -0400 (EDT) |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.164 Safari/537.36 |
URL:
<https://savannah.gnu.org/bugs/?60946>
Summary: bug in imresize implementation of Octave image
package
Project: GNU Octave
Submitted by: ratulloch
Submitted on: Tue 20 Jul 2021 12:57:40 AM UTC
Category: Octave Forge Package
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Incorrect Result
Status: None
Assigned to: None
Originator Name: Rick T
Originator Email:
Open/Closed: Open
Release: 6.3.0
Discussion Lock: Any
Operating System: Any
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Details:
Imresize gives incorrect results. Here's a link how it was found and how to
fix it / and a work around.
https://stackoverflow.com/questions/68445353/matrix-array-to-multidimensional-rgb-image-array-and-using-imresize-to-reshape-i
Test Code: Should be a color swatch but gives black boxes,
pkg load image
f(:,:,1)=[255;0;0;0;0];
f(:,:,2)=[0;255;0;0;255];
f(:,:,3)=[0;0;255;0;2];
height_wanted=640;
width_wanted=480;
repmat_rgb=cat(2,f,f); %add another column to array to get imresize to work
reshaped_output = imresize(repmat_rgb, [height_wanted,
width_wanted],'nearest'); %reshape swatch to large output
imshow(reshaped_output);
_______________________________________________________
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<https://savannah.gnu.org/bugs/?60946>
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- [Octave-bug-tracker] [bug #60946] bug in imresize implementation of Octave image package,
Rick T <=