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11-09-2013, 09:34 AM   #1
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Face detection on K-3

I dont think this is an option on the K-3 but is possible with new metering system that pentax could impliment a face detection focus with the PDAF of the K-3 like that of the d800. Or is the spread of the autofocus points to limiting. I know they mention scene recognition but not specifically face recognition. Any thoughts or does the K-3 already offer something like this, perhaps just not advertised.

11-09-2013, 12:32 PM   #2
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QuoteOriginally posted by Belnan Quote
I dont think this is an option on the K-3 but is possible with new metering system that pentax could impliment a face detection focus with the PDAF of the K-3 like that of the d800. Or is the spread of the autofocus points to limiting. I know they mention scene recognition but not specifically face recognition. Any thoughts or does the K-3 already offer something like this, perhaps just not advertised.
AFAIK face detection requires an actual image for analysis, so that's why it's only available in live view. The PDAF sensor works completely differently and thus doesn't collect enough data for face detection.

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11-09-2013, 02:15 PM   #3
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We used the Nikon D3X for three years and in PDAF it most definately would pick out only a brides(or grooms - lets just say a persons closest eye) as the focus point, and it was almost always 100% at doing that through all sorts of clutter. not really face detection, but I really would like to know if the K3 can do this.

David
11-09-2013, 02:51 PM   #4
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QuoteOriginally posted by David&karen Quote
We used the Nikon D3X for three years and in PDAF it most definately would pick out only a brides(or grooms - lets just say a persons closest eye) as the focus point, and it was almost always 100% at doing that through all sorts of clutter. not really face detection, but I really would like to know if the K3 can do this.

David
From one of the D800 engineers "We also bumped the pixel count of the RGB metering sensor up to 91,000 pixels so that faces can be detected even when shooting with the optical viewfinder"

Maybe in a future firmware update pentax will mention this. Seems that the 86K RGB should be sufficient to aid in focusing which is what they claim. Maybe experimenting will show that this is the case already.

11-09-2013, 05:13 PM   #5
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Several modern FF Nikons have face detection to some degree built into the scene recognition in PDAF.

The K-3 has a few face-detection items in the EXIF, which seem related to face detection in CDAF:

Faces Detected : 0
Face Position : 0 0
Face Detect : On (5 faces max); 0 faces detected
Face Detect Frame Size : 0 0

but they look much the same as the face detect EXIF entries in older Pentaxes like the K-x. So maybe PDAF face detection still remains a work-in-progress with the K-3.
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