[Digikam-devel] [Bug 138704] New: show selected AF points as graphical overlay in editor/preview

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           Summary: show selected AF points as graphical overlay in
                    editor/preview
           Product: digikam
           Version: unspecified
          Platform: Debian testing
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: Image Editor
        AssignedTo: digikam-devel kde org
        ReportedBy: Gabor.Ziegler ericsson com


Version:            (using KDE KDE 3.5.4)
Installed from:    Debian testing/unstable Packages

libexiv already support severel makernotes from Canon. For example, it shows (as an integer field) the AF point chosen by the camera.

A (kipi-plugin?) to overlay the focuspoint squares would be very handy, like in Canon's ZoomBrowser, or EosViewer. (See attachment).

It might be tricky, since the focuspoints size and location differs from camera-make to camera-make. I can provide example pics wit hthe overlay shown for EOS20D (a friend's machine) and EOS350D (mine).

NOTE: this feature is important for VIEWING. That is, it is needed not just in the editor, but in the preview mode.
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------- Additional Comments From Gabor.Ziegler ericsson com  2006-12-12 11:30 -------
Created an attachment (id=18895)
 --> (http://bugs.kde.org/attachment.cgi?id=18895&action=view)
Screenshot of Canon's ZoomBrowserEX highlighting the AF points as a picture
overlay. Selected AF point(s) is/are shown in red
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------- Additional Comments From Gabor.Ziegler ericsson com  2006-12-12 11:36 -------
Note, that (at least in Caon cameras) the sensitivity of the AF points are not unidirectional (not widely known property, though). Their sensitivity are indicated by the shape of the AF-point-indication. Attachment#18895 is a little bit misleading from this point of view, since it shows "squares" instead of properly oriented rectangles
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------- Additional Comments From Gabor.Ziegler ericsson com  2006-12-12 11:42 -------
The implementation shall be prepared to select different AF-sensor layout for drwaing no a per-camera-brand/make basis. I will upload an EOS 20D example soon, to see the differences between the AF-sensors of the different camereas from the same vendor
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------- Additional Comments From Gabor.Ziegler ericsson com  2006-12-12 11:44 -------
Additional practical note: the implementation shall be prepared to zoom the AF-point overlays together with the viewed picture, otherwise it may show erroneous location of AF-point
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[Charlier, Etienne]

I can provide a screen shot for a 400D if needed...

Regards
Etienne

-----Original Message-----
From: Gábor" Ziegler [mailto:[hidden email]]
Sent: mardi 12 décembre 2006 11:42
To: [hidden email]
Subject: [Digikam-devel] [Bug 138704] show selected AF points as graphicaloverlay in editor/preview

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------- Additional Comments From Gabor.Ziegler ericsson com  2006-12-12 11:42 -------
The implementation shall be prepared to select different AF-sensor layout for drwaing no a per-camera-brand/make basis. I will upload an EOS 20D example soon, to see the differences between the AF-sensors of the different camereas from the same vendor
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------- Additional Comments From Gabor.Ziegler ericsson com  2006-12-12 14:14 -------
Created an attachment (id=18900)
 --> (http://bugs.kde.org/attachment.cgi?id=18900&action=view)
Screenshot of Canon's EosViewer highlighting the AF points of AN EOS20D as a
picture overlay. Selected AF point(s) is/are shown in red
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Gabor.Ziegler ericsson com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #18895|Screenshot of Canon's       |Screenshot of Canon's
        description|ZoomBrowserEX highlighting  |ZoomBrowserEX highlighting
                   |the AF points as a picture  |the AF points of an EOS350D
                   |overlay. Selected AF        |as a picture overlay.
                   |point(s) is/are shown in red|Selected AF point(s) is/are
                   |                            |shown in red
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Gabor.Ziegler ericsson com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #18900|Screenshot of Canon's       |Screenshot of Canon's
        description|EosViewer highlighting the  |EosViewer highlighting the
                   |AF points of AN EOS20D as a |AF points of an EOS20D as a
                   |picture overlay. Selected AF|picture overlay. Selected AF
                   |point(s) is/are shown in red|point(s) is/are shown in red
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lure kubuntu org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |lure kubuntu org
             Status|UNCONFIRMED                 |NEW
      everconfirmed|0                           |1
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------- Additional Comments From lure kubuntu org  2007-05-24 22:30 -------
I have just tested this on my Canon 400D (Digital Rebel XTi) and which has same AF layout as 20 D and it reports same results in exiv2 field:

img_4191.jpg          Exif.CanonPi.AFPointsUsed20D                 Short       1  center
img_4192.jpg          Exif.CanonPi.AFPointsUsed20D                 Short       1  top
img_4193.jpg          Exif.CanonPi.AFPointsUsed20D                 Short       1  upper-right
img_4194.jpg          Exif.CanonPi.AFPointsUsed20D                 Short       1  right
img_4195.jpg          Exif.CanonPi.AFPointsUsed20D                 Short       1  lower-right
img_4196.jpg          Exif.CanonPi.AFPointsUsed20D                 Short       1  bottom
img_4197.jpg          Exif.CanonPi.AFPointsUsed20D                 Short       1  lower-left
img_4198.jpg          Exif.CanonPi.AFPointsUsed20D                 Short       1  left
img_4199.jpg          Exif.CanonPi.AFPointsUsed20D                 Short       1  upper-left
img_4200.jpg          Exif.CanonPi.AFPointsUsed20D                 Short       1  center, lower-right

As you can see, this is bitmap field and can indicate multiple points used.
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[Gilles Caulier-4]

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------- Additional Comments From caulier.gilles gmail com  2008-03-18 13:44 -------
Arnd,

This can be another candidate for GoC

Gilles
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