100 % crop

[achilles500]

What is meant by the term 100 % crop ?

[BeesWing]

Deleting the file?

[Harold Stiver]

It is when the resolution of your file is the same as the monitor.

For example if you use the view command in Photoshop and select "Actual Pixels" you are looking at 100% crop (1:1)

[njlarsen]

I would explain it a little bit differently by trying to give an example:

Part 1: You take an image with a camera that for example give you 3000*2000 pixels. That image has too many pixels to be uploaded here on birdforum, so most often before upload you will use some program to reduce the number of pixels without changing what is actually seen in the image; the resulting number of pixels could be 600x400. This is uncropped but with resolution reduced.

Part 2: If I ask for a central 100 % crop of the same image, I would expect you to cut away content from the edge until you are left with an area in the middle that has the same number of pixels, but now only shows a little from the center of your photo. A reason to look at a 100% crop is to compare equipment or methods: for example, is there a little bit of fuzzyness in the image at that resolution, it could be due to lens problems or problems with shutter speed too long compared to the stability of your rig. That fuzzyness might not be visible when you have reduced the resolution as in the first example.

Hope this helps
Niels

[postcardcv]

What is meant by the term 100 % crop ?

Deleting the file?

:clap::clap::-O

[HokkaidoStu]

Deleting the file?

That's what I end up doing with a lot of my photos.

Oh wait a minute............... I thought the OP said 100% CRAP. I need some new reading glasses.......

[QuantumTiger]

:clap::clap::-O
But that's 66% clap and 33% smiley.

Achilles: 100% crop is a funny term really since it doesn't really do what it says. Intuitively a 100% crop should mean cropping 100% of the image. But that is not what people mean.

What it is used to mean is: any crop which is presented so that one pixel on the display device equates to one pixel on the camera sensor. eg if I cropped 800x600 pixels from the original image and displayed them at 800x600 pixels that would be a 100% crop. If I resized them to display at 400x300 pixels it would not be.

Which is just a different way of saying what Harold and Niels said...

[RAH]

I agree with what Ian and others have said. Just want to emphasize that the point of a 100% crop is that you are presenting for view exactly what the camera produced, unmodified by any resize/resample. Once you have resampled an image, you have corrupted it, and you really cannot compare the results to the results from some other camera, for example.

[IanC_UK]

As has been said above, here are 2 pics, first is uncropped but resized, the second is a 100% crop of the same picture :)

[Duke Leto]

it might be me but the last 2 responses seem to be contradicting each other

[IanC_UK]

they dont contradict at all ? the 2nd image is at 100% but has been cropped, hence 100% crop, it is the exact size the camera produced, whereas the first image is the full image, resized to 700 pixels along the longest side so has been resampled/resized

[poledark]

Sorry if I appear to be thick, so what is/would be a 90% crop? or is there no such thing? Does it depend on the actual size you wish to display it?

Den

[IanC_UK]

there would be very little reason to do anything but a 100% crop if you were doing %age, as has been said its usually used to compare output of cameras without having to post the entire image at 100% as it would be massive.

[achilles500]

Thanks to all that replied, it now seems clearer.

Steve

[Jaff]

I've had some rather decent 100%'s so 8-P :-O