Bug 314022

Summary:	Implement focus peaking overlay to check or compare sharpness of images from preview.
Product:	[Applications] digikam	Reporter:	xstej70
Component:	Metadata-Focus	Assignee:	Digikam Developers <digikam-bugs-null>
Status:	REPORTED ---
Severity:	wishlist	CC:	axel.krebs, caulier.gilles, travneff, xstej70
Priority:	NOR
Version:	3.0.0
Target Milestone:	---
Platform:	Other
OS:	Linux
Latest Commit:		Version Fixed In:

Description xstej70 2013-01-28 10:32:49 UTC

Focus peaking is a manual focus assist feature that shows the area of focus by detecting contrast on edges. The Sony NEX series is well known for its good implementation of this feature.

While checking focus on many images in light table, it would be a nice feature if there was an overlay showing areas in focus. An example is to be found in this discussion:
http://www.luminous-landscape.com/forum/index.php?PHPSESSID=cc48e10b2da22d51629b5ef7bd82ce2c&topic=56246.msg457442#msg457442

Quick research: The Magic Lantern firmware for Canon cameras apparently has this feature. Looking at the sources, it is probably located in src/zebra.c located here:
https://bitbucket.org/hudson/magic-lantern/src

Reproducible: Always

Comment 1 Andrew 2013-12-29 15:14:15 UTC

Seems similar to this:  http://www.darktable.org/2013/11/determining-focus-in-lighttable/

Comment 2 caulier.gilles 2014-08-28 21:18:18 UTC

*** Bug 319160 has been marked as a duplicate of this bug. ***

Comment 3 caulier.gilles 2014-08-29 13:40:22 UTC

*** Bug 300679 has been marked as a duplicate of this bug. ***

Comment 4 Justin Zobel 2021-03-09 05:51:19 UTC

Thank you for the bug report.

As this report hasn't seen any changes in 5 years or more, we ask if you can please confirm that the issue still persists.

If this bug is no longer persisting or relevant please change the status to resolved.

Comment 5 caulier.gilles 2021-12-19 13:09:27 UTC

In digiKam 7.4.0, a first version of Focus Area Viewer is available in Light Table. It's not yet perfect, but it's a first start.

https://imgur.com/jbNbE1W