[Digikam-devel] [Bug 151685] New: Show calculated/derived image paramters (depth of field, image angle, ...)

[Christian Mayer]

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http://bugs.kde.org/show_bug.cgi?id=151685         
           Summary: Show calculated/derived image paramters (depth of field,
                    image angle, ...)
           Product: digikam
           Version: unspecified
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: wishlist
          Priority: NOR
         Component: general
        AssignedTo: digikam-devel kde org
        ReportedBy: bug christianmayer de


Version:           0.9.2-final (using KDE KDE 3.5.8)
Installed from:    Ubuntu Packages

I'd like to have a functionality in digikam that shows me (e.g. in a side pane) information about a picture that isn't stored in the Exif but that can be derived of it.

Possible candidates for that are:

- image angle (horizontal, vertical and diagonal)
  (function of focal length and sensor size)
- depth of field
  (function of focal length, aperture and focus distance as well as the circle of confusion)
- size of diffraction
  (function of aperture)

The size of the circle of confusion should be adjustable. Interesting sizes are the "classic" d/1500 (picture diameter divided by 1500), 1 pixel (thus dependend on the sensor) and a user settable DPI amount for an user settable image size.

Once these formulas are implemented (there are many internet resources for them) it also would be interesting to have an aditional menu entry where you can select a camera model and a lens for it and digikam will show you the calculated values (as a table and perhaps a graph) independend from actual pictures. So you don't need to go one of the many internet pages that calculate the DoF for you - you can do it yourself in digikam :)

BTW: I haven't seen one calculator so far that calculates a series of DoF (for different apertures) that takes care of the diffraction at the same time (if the aperture gets too big, you don't need to care about the user set circle of confusion as the diffraction will generate a bigger one anyway...) So digikam could be the first who does that :)