Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and our Privacy Policy.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Guest
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Photography Talk by Genre General Photography Talk 
Thread started 11 Jun 2012 (Monday) 07:42
Search threadPrev/next
sponsored links
(this ad will go away when you log in as a registered member)

50% or 100% crop??? I don't get it

 
mbdhld
Member
44 posts
Joined Dec 2010
     
Jun 11, 2012 07:42 |  #1

I'm confused here...

I see photos with comments on them being 100% or 50% cropped... What exactly does this mean?
In my mind, 100% crop should mean that the photo is zoomed in as far as possible (to pixels). OR it is not cropped at all as it is at 100% of the original photo. I know I'm not right so help me out here.

thanks in advance for clearing up for me.

sorry if this is in the wrong forum!




  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)
gjl711
According to the lazy TF, My flatulence rates
Avatar
55,267 posts
Likes: 2301
Joined Aug 2006
Location: Deep in the heart of Texas
     
Jun 11, 2012 08:00 |  #2

It's pretty straight forward. A 100% crop is a picture that has been cropped to fit POTN posting rules where one picture pixel = one monitor pixel. This is usually done by displaying the picture full size and cropping out a section.

A 50% crop is a picture that has been cropped to fit POTN posting rules where the 4 picture pixels = one monitor pixel. This is usually done by displaying the picture at 50% and taking a screen shot, and cropping out a section to fit POTN image posting rules..


Not sure why, but call me JJ.
I used to hate math but then I realised decimals have a point.
.
::Flickr:: (external link)
::Gear::

  
  LOG IN TO REPLY
MikeFairbanks
Cream of the Crop
6,428 posts
Joined Jun 2009
     
Jun 11, 2012 08:18 |  #3

What I think it means (at least from my experience) is that you open the photo in some kind of editing program. I use Photoshop Elements most of the time (and DPP, along with Photofiltre on rare occasions).

I go to view (or similar menu choice depending on the app) and click on 100%. Then, using the cropping tool crop what's visible in window. Or I just crop part of it.


Thank you. bw!

  
  LOG IN TO REPLY
tzalman
Fatal attraction.
Avatar
13,472 posts
Likes: 195
Joined Apr 2005
Location: Gesher Haziv, Israel
     
Jun 11, 2012 11:28 |  #4

To expand a bit the answers above - when you view an image at 100% (also called 1:1) one image pixel is represented by one screen pixel. Because most images are bigger in their pixel dimensions than most monitor screens, when viewing at 100% zoom you have to scroll up and down and sideways to see it all. For web display this is inconvenient for the viewer and may be against the rules of the site, so if you want to show an image that has not been downsized you have to crop out a section smaller than the average screen. The section can be viewed at 1:1 with no scrolling required and is therefore called a 100% crop.


Elie / אלי

  
  LOG IN TO REPLY
tonylong
...winded
Avatar
54,657 posts
Gallery: 60 photos
Likes: 544
Joined Sep 2007
Location: Vancouver, WA USA
     
Jun 11, 2012 13:05 |  #5

mbdhld wrote in post #14562010 (external link)
I'm confused here...

I see photos with comments on them being 100% or 50% cropped... What exactly does this mean?
In my mind, 100% crop should mean that the photo is zoomed in as far as possible (to pixels). OR it is not cropped at all as it is at 100% of the original photo. I know I'm not right so help me out here.

thanks in advance for clearing up for me.

sorry if this is in the wrong forum!

As others have indicated, your understanding (in bold) is correct :crop a portion of your image that will display on a monitor so that the resulting display would be the same as the image zoomed in to 100%.

There is a problem when people refer to a "50% crop" because it doesn't "communicate" the same thing. It's vague, but supposedly what they mean is that they are cropping out "half" of the image for composition, either cutting the dimensions in half or the total "area" in half and then resizing to display, but the 100% crop typically has different uses, it's more for analysis on the Web of things like fine detail or image noise.


Tony
Two Canon cameras (5DC, 30D), three Canon lenses (24-105, 100-400, 100mm macro)
Tony Long Photos on PBase (external link)
Wildlife project pics here (external link), Biking Photog shoots here (external link), "Suburbia" project here (external link)! Mount St. Helens, Mount Hood pics here (external link)

  
  LOG IN TO REPLY
watt100
Cream of the Crop
14,021 posts
Likes: 29
Joined Jun 2008
     
Jun 12, 2012 04:13 |  #6

tonylong wrote in post #14563589 (external link)
As others have indicated, your understanding (in bold) is correct :crop a portion of your image that will display on a monitor so that the resulting display would be the same as the image zoomed in to 100%.

There is a problem when people refer to a "50% crop" because it doesn't "communicate" the same thing. It's vague, but supposedly what they mean is that they are cropping out "half" of the image for composition, either cutting the dimensions in half or the total "area" in half and then resizing to display, but the 100% crop typically has different uses, it's more for analysis on the Web of things like fine detail or image noise.

For me a 50% crop means when you crop an image from 4272 x 2848 pixels down to 2136 x 1424 pixels




  
  LOG IN TO REPLY
tzalman
Fatal attraction.
Avatar
13,472 posts
Likes: 195
Joined Apr 2005
Location: Gesher Haziv, Israel
     
Jun 12, 2012 06:06 |  #7

watt100 wrote in post #14566983 (external link)
For me a 50% crop means when you crop an image from 4272 x 2848 pixels down to 2136 x 1424 pixels

But then the image area and number of pixels is 25% of the original, so maybe it is a 25% crop. :p


Elie / אלי

  
  LOG IN TO REPLY
jc1350
Member
158 posts
Likes: 6
Joined Apr 2006
Location: Maryland
     
Jun 12, 2012 07:01 |  #8

Another bit of confusion is when people use the word "crop" when they mean "re-size" and vice versa. Cropping involves removing parts of the original. Re-size is scaling the image (cropped or not) to smaller dimensions.


--
John

  
  LOG IN TO REPLY
tonylong
...winded
Avatar
54,657 posts
Gallery: 60 photos
Likes: 544
Joined Sep 2007
Location: Vancouver, WA USA
     
Jun 12, 2012 09:54 |  #9

When I crop for composition, I don't even thing in terms of a percentage. Maybe it's a "close" crop, maybe I'm happiest with an actual "100% crop", though it wouldn't be useful for much of a print larger than a 4x6 or a 5x7 or whatever!


Tony
Two Canon cameras (5DC, 30D), three Canon lenses (24-105, 100-400, 100mm macro)
Tony Long Photos on PBase (external link)
Wildlife project pics here (external link), Biking Photog shoots here (external link), "Suburbia" project here (external link)! Mount St. Helens, Mount Hood pics here (external link)

  
  LOG IN TO REPLY
jc1350
Member
158 posts
Likes: 6
Joined Apr 2006
Location: Maryland
     
Jun 12, 2012 10:50 |  #10

tonylong wrote in post #14567985 (external link)
When I crop for composition, I don't even thing in terms of a percentage. Maybe it's a "close" crop, maybe I'm happiest with an actual "100% crop", though it wouldn't be useful for much of a print larger than a 4x6 or a 5x7 or whatever!

I look at it the other way. Since cropping is a removal process, I view "100% crop" to mean there is nothing left of the image. ;)


--
John

  
  LOG IN TO REPLY
MikeFairbanks
Cream of the Crop
6,428 posts
Joined Jun 2009
     
Jun 12, 2012 10:57 |  #11

All good points above.

Yes, crop means to remove parts of the image. It really should be thought of as trimming.

Here's what I was talking about:

I took this stupid photo of a banana car I made. This is how the photo came out:

IMAGE: http://fairmont.smugmug.com/Miscellaneous/Miscellaneous/i-9PJTkgf/0/L/test-one-L.jpg

Then, I went to view at 50%, and this is what filled the screen:

IMAGE: http://fairmont.smugmug.com/Miscellaneous/Miscellaneous/i-NFKRT9K/0/L/test-two-L.jpg

Finally, I clicked at view 100% and this is what filled the screen:

IMAGE: http://fairmont.smugmug.com/Miscellaneous/Miscellaneous/i-VNJ5CcR/0/L/test-three-L.jpg

Thank you. bw!

  
  LOG IN TO REPLY
tonylong
...winded
Avatar
54,657 posts
Gallery: 60 photos
Likes: 544
Joined Sep 2007
Location: Vancouver, WA USA
     
Jun 12, 2012 11:24 |  #12

jc1350 wrote in post #14568305 (external link)
I look at it the other way. Since cropping is a removal process, I view "100% crop" to mean there is nothing left of the image. ;)

The term "100% crop" is pretty much a term for use in places like this forum and then a "100% View" typically applies to photo editing or viewing software, and describes viewing the image with one image pixel mapping to one monitor pixel, whereas the cropping means the image is cropped closely so that you see a portion of the image with that mapping without the results overflowing your screen (or your forum limitations) when viewing on a place like POTN, although in an app like Photoshop you can choose a "100% View" where the image enlarges to that "pixel-to-pixel mapping", obviously way larger than your typical viewing monitor!


Tony
Two Canon cameras (5DC, 30D), three Canon lenses (24-105, 100-400, 100mm macro)
Tony Long Photos on PBase (external link)
Wildlife project pics here (external link), Biking Photog shoots here (external link), "Suburbia" project here (external link)! Mount St. Helens, Mount Hood pics here (external link)

  
  LOG IN TO REPLY
MikeFairbanks
Cream of the Crop
6,428 posts
Joined Jun 2009
     
Jun 12, 2012 11:38 |  #13

Also, the above photos I took looked like crap until I change aperture, etc.


Thank you. bw!

  
  LOG IN TO REPLY
tzalman
Fatal attraction.
Avatar
13,472 posts
Likes: 195
Joined Apr 2005
Location: Gesher Haziv, Israel
     
Jun 12, 2012 12:11 |  #14

jc1350 wrote in post #14568305 (external link)
I look at it the other way. Since cropping is a removal process, I view "100% crop" to mean there is nothing left of the image. ;)

You are free to look at it any way you want, but within the context of photography forums and blogs, "100% crop" is a quasi-technical term with a clear, fixed and generally agreed meaning.


Elie / אלי

  
  LOG IN TO REPLY
mbdhld
THREAD ­ STARTER
Member
44 posts
Joined Dec 2010
     
Jun 12, 2012 13:11 |  #15

well,
thanks for the answers...
Still not sure - sounds like 100% crop may mean different things to different folks.

Maybe majority would agree to this: if I write "100% crop" it means I used software and put it at 100% view (this seems more like "resizing" to me - am I right here??)
And, 50% crop means that it was "resized to fit, then about 50% of the photo was "cropped out".




  
  LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as a registered member)

4,310 views & 0 likes for this thread
50% or 100% crop??? I don't get it
FORUMS Photography Talk by Genre General Photography Talk 
AAA
x 1600
y 1600

Jump to forum...   •  Rules   •  Index   •  New posts   •  RTAT   •  'Best of'   •  Gallery   •  Gear   •  Reviews   •  Member list   •  Polls   •  Image rules   •  Search   •  Password reset

Not a member yet?
Register to forums
Registered members may log in to forums and access all the features: full search, image upload, follow forums, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, all settings, view hosted photos, own reviews, see more and do more... and all is free. Don't be a stranger - register now and start posting!


COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies and to our privacy policy.
Privacy policy and cookie usage info.


POWERED BY AMASS forum software 2.1forum software
version 2.1 /
code and design
by Pekka Saarinen ©
for photography-on-the.net

Latest registered member is mstave
1093 guests, 290 members online
Simultaneous users record so far is 15144, that happened on Nov 22, 2018

Photography-on-the.net Digital Photography Forums is the website for photographers and all who love great photos, camera and post processing techniques, gear talk, discussion and sharing. Professionals, hobbyists, newbies and those who don't even own a camera -- all are welcome regardless of skill, favourite brand, gear, gender or age. Registering and usage is free.