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FORUMS Canon Cameras, Lenses & Accessories Canon EOS Digital Cameras 
Thread started 15 Oct 2014 (Wednesday) 11:50
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7D Mark II ?

 
mrgooch
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Oct 15, 2014 11:50 |  #1

What is with the cryptic title and description here. Is this simply " Face Detection " ?


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joeblack2022
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Oct 15, 2014 11:57 |  #2

...the EOS-1D X can tie in its 100,000 pixel RGB metering sensor to the AF system and read where a subject is based on its color, size and shape, and “tell” the AF system which AF points to use as the subject moves around the frame. This is called EOS iTR — Intelligent Tracking and Recognition.

http://www.learn.usa.c​anon.com …/2012/1dx_guide​book.shtml (external link)


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travisvwright
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Oct 15, 2014 12:01 |  #3

mrgooch wrote in post #17214288 (external link)
What is with the cryptic title and description here. Is this simply " Face Detection " ?

I see what you did there.


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mrgooch
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Oct 15, 2014 12:32 |  #4

Still very confusing to me . Can you explain in simpler terms? Wouldn't this be something you would always leave on?



  
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apersson850
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Oct 15, 2014 12:45 as a reply to  @ mrgooch's post |  #5

Ouch, that's what the guidebook was written to accomplish!

Anyway, when using many AF points, specifically Zone AF or all points in One Shot AF mode, the iTR system will add face detection information to the decision the camera makes, when it decides which AF point to use.

In Servo AF mode, the camera always start tracking with one selected AF point. If that point suddenly no longer has any subject in focus, because the photographer wasn't able to keep the point over the subject, the traditional method is to check if another AF points is in or near focus. If so, it's likely that this point is now covering the subject, so tracking is handed over to the new point.
iTR adds informaton about which color the subject under the primary AF point had when tracking started, and checks if it finds this color under some other AF point, when the primary one looses track. If the subject has a distinctive color, like a hot pink shirt against bushes or a yellow team suit agains hockey ice, this increases the proability that tracking is handed over to the right AF point.

The extra processing this requires may slow the camera's sequential shooting speed down a bit. In One Shot AF mode, it's not always you'd like the camera to scout for faces. So there are reasons for turning iTR off, but in many cases you can leave it on. I have it on almost always, since in these cases where I wouldn't want it to interfere, I usually use neither zone nor all points AF. Hence it's not active anyway.


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mrgooch
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Oct 15, 2014 12:51 |  #6

Much clearer definition. You must have been to a seminar.



  
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apersson850
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Oct 15, 2014 14:07 as a reply to  @ mrgooch's post |  #7

Nope. But I've read the manual.


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2n10
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Oct 15, 2014 14:14 |  #8

apersson850 wrote in post #17214561 (external link)
Nope. But I've read the manual.

After spending the night at a Holiday Inn.:D


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7D Mark II ?
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