[digikam] [Bug 508104] Add Fujifilm focus-point extractor support to digiKam

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=508104

--- Comment #12 from focus-point at mailinator.com ---
Thank you for your efforts until now! Test is ready! 

To pass the test, red ball should be completely inside the red frame we draw.
Red frame shouldn't be touching the red ball! 

Since we don't want to cover focused area with lines of red frame that can
hinder people seeing focused area fully, it's better to have larger frame that
doesn't touch the ball at all than tighter frame.

When I tested myself on 8.8 you sent me, my feedback is:
- Well done! Red frame positioning is correct even with different aspect ratios
and positions of focus point.
- Frame size needs to be bigger! You only need to increase 1/12 ratio in the
code until you pass the test. You can try from 1/10 to 1/6 until it passes.
High likely 1/6 will work best!
- Also, see my warning about manuel focus in my previous messages.

To determine the size of our red frame, you can also see screenshot of the
camera. My measurements of screen and photos says we should consider 1/7 or
1/6.

Here is the link valid for 7 days until 19th: https://sendgb.com/8XHejD2Qldt

How test is created: As I explained rationale in my previous messages,
fujifilm's have a feature to zoom-in to the focused point in playback screen. I
determined focus frame size exactly matching with this feature. Then all my
test photos I fit this red ball exactly inside this frame. Also, I shoot each
photo with shallow DOF where only red ball will be in focus. and zoomed in each
photo in digikam to double check nothing else is in focus.

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