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Old Jun 26, 2013, 02:50 AM   #76
Menneisyys2
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Join Date: Jun 2011
Strange they didn't experience image quality degradation with the stock Camera app under iOS7. My experience is exactly the opposite: it doesn't make use of the oversampling capabilities. Currently, as of b1 and b2 on the iPhone5, only direct, programmatic access is able to make use of it.

I've posted a complete discussion of this question, illustrated by several, controlled test shots, to http://forums.macrumors.com/showthread.php?t=1601763

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Quote:
Originally Posted by .Asa View Post
Am I the only one who hates the new camera app? Zoomed video? Square photos? Cheesy vintage filters? I may stay on iOS 6.
Well, actually, lossless zooming does work - but, unlike what the original article stated, not in the stock Camera app, at least not for now.
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Old Jun 26, 2013, 03:15 AM   #77
Menneisyys2
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Quote:
Originally Posted by Unggoy Murderer View Post
I don't get the concept of digital zoom... you'd be better just cropping the image, or moving closer, rather than degrading the quality.
Apple has implemented somehing like Nokia in the PureView 808 two years ago. That is, up to a point (1.4545x zoom factor with Full HD, 2.1x with 720p etc.), you can losslessly zoom.

Again, this does NOT seem work in the current stock Camera app in either iOS7 b1 or b2 on the iPhone 5. The original, linked article seems to be flawed.

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Quote:
Originally Posted by jayducharme View Post
Hooray! I was considering getting a new HD video camera. But if the iPhone can now zoom, I'm a happy puppy! 2x-3x isn't much, but it should do fine for my needs.
Note that, in Full HD mode, 1.4545x zoom is the max you can zoom up to losslessly.

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Originally Posted by everything-i View Post
You do realize this is zooming for video not stills. You should be able to zoom an 8MP sensor image 2-3 times without any loss of quality at 1080p.
Unfortunately, it's 1.4545x only in Full HD. Nevertheless, it worked just fine in my tests - see my above-linked report.

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Quote:
Originally Posted by lusky View Post
This isn't digital zoom. A full1080P HD image is only 2 mega pixels. for the wide shot it uses the full 8 megapixel sensor and downscales as you zoom in it uses less of the sensor but still more than 2MP. the furthest zoom I imagine will be the central 2 MP of the sensor. If you zoomed in after that you would lose quality.
Exactly.

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Quote:
Originally Posted by Otterblue View Post
Where's the 60fps video?
It's there and working (albeit not at the best quality). See http://forums.macrumors.com/showthread.php?t=1602171 for a complete report.

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Quote:
Originally Posted by Anonymous Freak View Post
The sensor on the iPhone 5 is 3264 pixels wide. That's 1.7 times the width of the 1920 pixels of its maximum video resolution. That means you could reasonably zoom on 2x without losing any measurable detail (when compressed to the level of H.264 it compresses - if you could get raw video out, then 1.7x is about it.)
In theory, 1.7; in practice, 1.4545 - see my article for more info if interested.

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Quote:
Originally Posted by AppleMark View Post
However a word of caution.

Any good HD video camera will 'zoom' to a point with an optical lens, preserving image quality. iOS devices rely on digital zooming which although may increase zoom 2x/3x, will also degrade your image quality proportionally.
When you only zoom up to the upsampling limit, no quality degradation will take place. See the Nokia PureView 808.
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Old Oct 7, 2013, 05:20 AM   #78
Menneisyys2
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Guys,

I've posted a full article on the zooming of iOS7 to the MacRumors forum:

http://forums.macrumors.com/showthread.php?p=18091855
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