Bug 1122503 - compare -metric AE always prints '65535 dB'
Summary: compare -metric AE always prints '65535 dB'
Alias: None
Product: Red Hat Enterprise Linux 5
Classification: Red Hat
Component: ImageMagick
Version: 5.11
Hardware: All
OS: Linux
Target Milestone: rc
: ---
Assignee: Jan Horak
QA Contact: Desktop QE
Depends On:
TreeView+ depends on / blocked
Reported: 2014-07-23 11:56 UTC by Martin Frodl
Modified: 2017-04-18 22:05 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2017-04-18 22:05:06 UTC

Attachments (Terms of Use)

Description Martin Frodl 2014-07-23 11:56:57 UTC
Description of problem:

According to upstream documentation, 'compare -metric AE <image1> <image2> <output>' should print the number of pixels in which <image1> and <image2> differ. On RHEL 5, however, the output is always '65535 dB' if the two images differ, '0 dB' otherwise.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. wget http://upload.wikimedia.org/wikipedia/commons/a/a2/Pixel-white.png
2. wget http://upload.wikimedia.org/wikipedia/en/4/45/One_black_Pixel.png
3. compare -metric AE Pixel-white.png One_black_Pixel.png /dev/null

Actual results:
65535 dB

Expected results:

Additional info:
RHEL 7 builds display the expected behaviour (tested on ImageMagick-

Comment 1 Chris Williams 2017-04-18 22:05:06 UTC
Red Hat Enterprise Linux 5 shipped it's last minor release, 5.11, on September 14th, 2014. On March 31st, 2017 RHEL 5 exited Production Phase 3 and entered Extended Life Phase. For RHEL releases in the Extended Life Phase, Red Hat  will provide limited ongoing technical support. No bug fixes, security fixes, hardware enablement or root-cause analysis will be available during this phase, and support will be provided on existing installations only.  If the customer purchases the Extended Life-cycle Support (ELS), certain critical-impact security fixes and selected urgent priority bug fixes for the last minor release will be provided.  For more details please consult the Red Hat Enterprise Linux Life Cycle Page:

This BZ does not appear to meet ELS criteria so is being closed WONTFIX. If this BZ is critical for your environment and you have an Extended Life-cycle Support Add-on entitlement, please open a case in the Red Hat Customer Portal, https://access.redhat.com ,provide a thorough business justification and ask that the BZ be re-opened for consideration of an errata. Please note, only certain critical-impact security fixes and selected urgent priority bug fixes for the last minor release can be considered.

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