There's only one way. Cropping is simply cutting out part of the full image. It doesn't matter what part of the frame, or the aspect ratio.
If you select the left half, or the right half, or the middle 2 quarters, vertically or horizontally, you have cropped the image by 50% and you have 50% remaining in the resulting cropped image.
If you cut off one end of the full frame to make it fit in an 8x10 frame you've cropped the image by about 17%, leaving about 83% for the 8x10 part (the full frame has an aspect ration of 1:1.5 so it would make an 8x12 uncropped print).
Yes Barbara - cropping to 50% is 50% of the area, which is 50% of the full frame, which is 50% of the megapixels. Those are all the same.
Where confusion arises is in two places :
-- When someone says that an image is, say, a 40% crop; It's not always clear if they mean they removed 40%, or if there is 40% left
-- When someone says an image is a "100% crop", it means they cut out a pixel-for-pixel section of the 100% view of their image in an editor. So 1 pixel in the original image equals 1 pixel on your screen.
Posted by David Graham on July 26, 2012 at 1:11 AM
Woooooaaah there David!
I was fine up to your last two sentences refering to "100% crop" . I have no idea what " ...pixel-for-pixel section of the 100% view..." means?
Can you refer this archetypal ludditic cybercretin to a comprehensible explanation of this concept?
Many thanks,
Dave Graham, East River, SD
I was fine up to your last two sentences refering to "100% crop" . I have no idea what " ...pixel-for-pixel section of the 100% view..." means?
This is a terribly confusing term that is unfortunatelyused by a lot of people. As David B says:
- view the image in Photoshop at 100% (each pixel in the image file is mapped to a single pixel on the screen).
- drag the crop tool over this 100% view image to make your 720 pixel wide image for NPN.
The result is a small section of the entire image that doesn't "hide" any of the original pixels by averaging them o the screen or re-sampling them down to 720 pixels.
Strictly speaking "100%" means "all" so a 100% should either be no cropping or complete discard of everything.
The confusion with the "100% crop" term is that "100%" in that case has nothing to do with how much you're cropping. Instead, it really means, "a crop of a portion of the image when viewed at 100% on your monitor" (as Richard described). So the "100%" refers to the zoom level in Photoshop or other programs, and not to the crop itself.
Posted by Basil Greber on July 26, 2012 at 11:56 AM
In fact, 100% crop means that the image has not been resized, so what you see are actual pixels of the original capture. How much it has been cropped doesn't matter much, even though an uncropped 100% crop will take a long time to load in your browser, while a heavily cropped 100% crop is more convenient. Confusion complete now?
Discussion
6 repliesIf you select the left half, or the right half, or the middle 2 quarters, vertically or horizontally, you have cropped the image by 50% and you have 50% remaining in the resulting cropped image.
If you cut off one end of the full frame to make it fit in an 8x10 frame you've cropped the image by about 17%, leaving about 83% for the 8x10 part (the full frame has an aspect ration of 1:1.5 so it would make an 8x12 uncropped print).
Where confusion arises is in two places :
-- When someone says that an image is, say, a 40% crop; It's not always clear if they mean they removed 40%, or if there is 40% left
-- When someone says an image is a "100% crop", it means they cut out a pixel-for-pixel section of the 100% view of their image in an editor. So 1 pixel in the original image equals 1 pixel on your screen.
I was fine up to your last two sentences refering to "100% crop" . I have no idea what " ...pixel-for-pixel section of the 100% view..." means?
Can you refer this archetypal ludditic cybercretin to a comprehensible explanation of this concept?
Many thanks,
Dave Graham, East River, SD
This is a terribly confusing term that is unfortunatelyused by a lot of people. As David B says:
- view the image in Photoshop at 100% (each pixel in the image file is mapped to a single pixel on the screen).
- drag the crop tool over this 100% view image to make your 720 pixel wide image for NPN.
The result is a small section of the entire image that doesn't "hide" any of the original pixels by averaging them o the screen or re-sampling them down to 720 pixels.
Strictly speaking "100%" means "all" so a 100% should either be no cropping or complete discard of everything.