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07-10-2009, 05:13 PM   #1
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What is a 100% crop?

I often see photos posted with this description. What does it mean?
...Chris

07-10-2009, 05:57 PM   #2
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Hi Chris,
Often someone will post a 100% crop directly after they post a resampled image showing the entire photograph.
Obviously most people's monitors aren't large enough to show photographs at full 1:1 magnification (and still see the entire image on screen). So for example someone will post a resized image, often sized to around 800 pixels or so on one of the edges, so people can see the entire photograph.

Then they'll post a 100% crop, a cutout from the full-size photo, maybe 200x200 or whatever they decide. Viewing this gives you a 1:1 un-resampled view of the actual file. People will often do this to show what detail their camera does or does not capture, or use it to determine other things: how sharp is the photo, was there any camera shake, etc.

Here's an example:
Full photograph (resized/resampled to be viewable on screen):


100% crop:

Last edited by khardur; 07-11-2009 at 05:52 AM. Reason: spelling
07-10-2009, 06:39 PM   #3
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QuoteOriginally posted by khardur Quote
Then they'll post a 100% crop, a cutout from the full-size photo, maybe 200x200 or whatever they decide. Viewing this gives you a 1:1 un-resampled view of the actual file.
Thanks, Khardur. I take it then that one displays the image at 100%, then crops a suitable piece and posts the cropped sample.
07-10-2009, 06:44 PM   #4
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Exactly... excellent example Dan!

Now on to the burning question... Chris, where in Kanata are you??? I used to live over on Constance Lake Rd. (towards Dunrobin). Perhaps 1.5 km at most from March Rd.

This is too funny (in a good way of course)... not asking for an exact address, just curious...

07-10-2009, 06:48 PM   #5
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Hi Marc. Glen Cairn, between Castlefrank and Terry Fox. Been in the same house since 1980, when I was on the western edge of the city.
07-10-2009, 07:25 PM   #6
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Wow. Up until a year and abit ago, a worked at the corner of March & Terry Fox. That's really close!

Lived in the Glen Cairn area in the mid 80s for a year, till I moved to the valley.
07-11-2009, 07:39 AM   #7
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QuoteOriginally posted by kitkat Quote
Thanks, Khardur. I take it then that one displays the image at 100%, then crops a suitable piece and posts the cropped sample.
Doesn't matter what size you *display* the image at; just don't actually use any resizing commands that alter the alter image. As long as you don't actually resize the image, any crop you make will be a a 100% crop.
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