Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-29-2009, 01:03 PM   #1
Inactive Account




Join Date: Jul 2007
Location: London
Posts: 1,067
K-7 Face detection feature ?

Hi

Anyone have any idea how the new Pentax K-7's Face detection feature is likely to operate...something along the lines of say Fuji's FinePix S6500fd camera, perhaps ?

Best regards
Richard

05-30-2009, 03:05 AM   #2
Pentaxian
Arpe's Avatar

Join Date: Sep 2006
Location: New Zealand
Photos: Gallery | Albums
Posts: 4,335
I know all the compacts have it, but what is it supposed to do after detecting a face?
05-30-2009, 03:12 AM   #3
and
Veteran Member




Join Date: Mar 2007
Photos: Gallery
Posts: 2,471
Focus on it, since its an AF mode, not an exposure mode.
05-30-2009, 03:21 AM   #4
Pentaxian
Arpe's Avatar

Join Date: Sep 2006
Location: New Zealand
Photos: Gallery | Albums
Posts: 4,335
Ahhhhhhhh.

05-30-2009, 04:46 AM   #5
Pentaxian




Join Date: May 2007
Location: WW community of Pentax users
Photos: Gallery | Albums
Posts: 2,139
QuoteOriginally posted by Confused Quote
...Anyone have any idea how the new Pentax K-7's Face detection feature is likely to operate...
And more importantly: can you switch it off?
05-30-2009, 10:02 AM   #6
Veteran Member
blende8's Avatar

Join Date: Feb 2007
Location: Bremen, Germany
Photos: Albums
Posts: 1,484
Face detection is an option in Lifeview only.
Here you have three AF options:
You can select phase-detect AF (via AF button), contrast-AF and contrast-AF with face detect:

05-30-2009, 11:37 AM   #7
Pentaxian
panoguy's Avatar

Join Date: Sep 2007
Location: Washington, D.C.
Photos: Gallery | Albums
Posts: 3,287
Face-detection activated (I guess it was already switched on) while I was trying out the K-7's Live View in Toronto recently. The rep was saying something when all of a sudden a yellow-ish box appeared around a guys head as he walked through the frame! It moved across the frame and stayed with him even as he walked behind a glass display case (this was on a photo expo floor).

Kinda freaky to see it, actually, as I've never had a P&S with this feature and it was a full profile that it recognized. Not sure how useful this is, but it might keep focus where you want it in some situations...
05-31-2009, 04:51 AM   #8
Inactive Account




Join Date: Jul 2007
Location: London
Posts: 1,067
Original Poster
Hi blende8

Re your observation:

QuoteQuote:
Face detection is an option in Lifeview only.
I'm afraid I don't quite get this ! Precisely what use would Face detection be if it only functioned in Live-view mode ? Anyone else care to elaborate further……

Best regards
Richard

05-31-2009, 05:01 AM   #9
Veteran Member
blende8's Avatar

Join Date: Feb 2007
Location: Bremen, Germany
Photos: Albums
Posts: 1,484
QuoteOriginally posted by Confused Quote
I'm afraid I don't quite get this ! Precisely what use would Face detection be if it only functioned in Live-view mode ?
It's for technical reasons.
The phase AF sensor is not suited for face detection.
You know that the sensor/shutter is closed when you look through the view finder in normal mode. How should face detection work, then?
This is only possible by evaluating the complete image on the sensor.
And you get this image in Life View only.

Not sure if this answers your question.
05-31-2009, 05:22 AM   #10
Veteran Member
pcarfan's Avatar

Join Date: Sep 2007
Location: Dayton, Ohio
Photos: Gallery | Albums
Posts: 2,958
Does it work this way ?, if so, then it would probably be useful.

You leave the camera to choose where to focus (auto focus mode). Then choose face detection. Now when you focus, the camera will know where the face of the person is, and then choose the appropriate focus point to choose and focus the face. If it works fast (I think it doesn't in a DSLR), then it could be useful.

Also, the face doesn't have to be on any of the 11 focus points, as the focus is done with the live view image.

Last edited by pcarfan; 05-31-2009 at 05:28 AM.
05-31-2009, 06:10 AM   #11
Inactive Account




Join Date: Jul 2007
Location: London
Posts: 1,067
Original Poster
A few P&S compacts and advanced Bridge-Cameras still possess viewfinders (obviously electronic ones), so you can visually see these 'boxes' tracking a person's face. I'm interested to learn what will happen in the instance of the K-7's optical TTL viewfinder ?

Best regards
Richard
05-31-2009, 07:36 AM   #12
Veteran Member
blende8's Avatar

Join Date: Feb 2007
Location: Bremen, Germany
Photos: Albums
Posts: 1,484
As I said, you will see nothing in the viewfinder, since it's an optical one.
You can see it only on the screen at the back of the camera in Life View mode.
If the camera catches a face, you will see a yellow square around it.
The camera can follow this face, if it moves around.
05-31-2009, 08:32 AM   #13
Inactive Account




Join Date: Jul 2007
Location: London
Posts: 1,067
Original Poster
Hi blende8

Thanks for confirming my initial suspicions, so it seems that you'd have to compose a photo using the rear LCD in Live-View whilst holding the K-7 at slight arms length, as one typically does with a viewfinder-less P & S compact. IMHO this severely limits the potential usefulness of the K-7's face-detection feature !

Best regards
Richard
05-31-2009, 11:53 AM   #14
Veteran Member
mattdm's Avatar

Join Date: Feb 2007
Location: Boston, MA
Photos: Gallery
Posts: 2,964
It'd also be okay on a tripod, of course.

But I don't think it affects the metering, which is the most useful part of this feature on P&S cameras.
06-02-2009, 08:43 AM   #15
Inactive Account




Join Date: Jul 2008
Location: Colorado
Posts: 146
QuoteOriginally posted by Bart Quote
And more importantly: can you switch it off?
Defenitely.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, detection, dslr, feature, photography
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
People The Face of a Newbi is a face only a mother could love :) Borislav Post Your Photos! 2 04-23-2010 12:36 PM
Rare Pentax Paranormal / Supernatural Detection Device gabriel_bc Pentax Film SLR Discussion 6 12-04-2009 05:15 PM
K-7 face detection Mystic Pentax DSLR Discussion 14 09-16-2009 05:36 PM
Face Detection? PentaxForums-User Pentax DSLR Discussion 1 06-03-2009 09:32 AM
New and improved cracker detection on the E50 dietcokefiend Pentax Compact Cameras 2 03-23-2008 06:04 PM



All times are GMT -7. The time now is 01:51 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top