Cropping percentage? How much is this?

swag72

swag72

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Firstly, please excuse my very quick and basic pic.

If I took a pic that was the size of the black rectangle and cropped it to the size of the red rectangle. What % crop would that be? I keep seeing a 100% crop being given as an example but can not visualise how much of a crop that is in reality. (I know that my boxes aren't very good!!)

Hope this makes sense.

picture_size.jpg
 
What is meant by 100% crop is a crop from the full size pic. ie, in PS (Or whichever software you use) zoom in so the pic is at 100%. Then crop a section of your image, like you've done with your diagram. what you would now have is the 100% crop which you could then post on here if you wanted to demonstrate image quality. Make sure you do not resize/sharpen the crop.

Hope that load of waffle makes sense. ;)
 
A 100% crop is a cropped portion of an image that can appear on your screen at full size. Your example isn't the same thing so I think you're perhaps misunderstanding the term.

Basically your original image is to big to be seen on a screen at full size (zoomed in to 100% view) so you can't show people the quality of the photograph because to display it on screen you need to zoom out.

So you need to open the image and zoom in to 100% view. Then crop a segment of the image that fits your screen. Save that as another image and it is then your 100% crop - a full sized segment of the original picture.

Does that make any sense?
 
And I should type faster so Fabs doesn't get there first with exactly the same answer.
 
Perfect answer from you both :clap:- Thanks.

Next dumb question - How do I crop to the screen size after I have zoomed into 100%? Each time I try in CS3, the whole damn pic moves. Is there a quick way that I am missing?

You said don't resize fabs - I need it at 800 for uploading to the gallery. Is this OK?
 
swag72 said:
Perfect answer from you both :clap:- Thanks.

Next dumb question - How do I crop to the screen size after I have zoomed into 100%? Each time I try in CS3, the whole damn pic moves. Is there a quick way that I am missing?

You said don't resize fabs - I need it at 800 for uploading to the gallery. Is this OK?
Click to expand...

I only use Elements but as long as you have the crop tool selected you should just be able to click and drag to select the area for cropping. As for the size, I tend to just take a guess based on the size pics look on the forum.
 
When I'm cropping I ignore size etc, just crop to the area of shot I want. I then resize it to 800px along the longest edge for posting on TPF :)
 
swag72 said:
Each time I try in CS3, the whole damn pic moves. Is there a quick way that I am missing?
Click to expand...
Thats because you are trying to crop an image that is too large to
fit into the viewer.
on the right hand side in CS3 can you see the small image?

The red square inside that image is the area that you are viewing at that
time.
zoom out a little until the whole image is inside that square then you will be able to crop at what ever size you want
without the image moving as you drag the "cropping square" over it
Hope that make sense
 
I didn't know you could crop in Photoshop, I've only ever done "Image Size" and "Canvas Size" adjustments (which are not very accurate). Where do I find the crop tool??
 
Itti said:
I didn't know you could crop in Photoshop, I've only ever done "Image Size" and "Canvas Size" adjustments (which are not very accurate). Where do I find the crop tool??
Click to expand...

Depending which version you have.When you open Photoshop,the toolbar on the left hand side,About 5 icons down,looks like a square.Thats the crop tool
.Hope this helps
 
Ah right! I've been looking in the menus all this time, no wonder I couldn't find it!
Thanks a lot :)
 
Cobra said:
Thats because you are trying to crop an image that is too large to
fit into the viewer.
on the right hand side in CS3 can you see the small image?

The red square inside that image is the area that you are viewing at that
time.
zoom out a little until the whole image is inside that square then you will be able to crop at what ever size you want
without the image moving as you drag the "cropping square" over it
Hope that make sense
Click to expand...

Makes perfect sense but - I don't think I've explained it well enough. I want to take a 100% crop, so zoom into 100% on my pic. I then want to crop the pic for posting to that 100% size. Each time I try that the pic moves all over the place.

How do I just crop what I am seeing on the screen?

Does that make sense? Have I missed something?!
 
I'm not understanding that.

Do you mean you want to post the whole image? In which case use the resize tools to get it to be 800 pixels wide. (eediit: I am assuming that this is for posting here - if you want to post the whole image elsewhere at 100% just save it without resizing)

The point about 100% crops is that you are reproducing the pixels from your original image 1:1 with the image others will see. So people usually post them when they are concered about potential problems with their lens or body. Any use of resizing will mean that the software is producing an image which is not a 1:1 pixel: pixel reproduction of your original image, so would not be of any use for arguing about softness or contrast etc. So from your original 4000x3000* pixel image you are cutting out an 800x600 patch of that original image (if you want it to be 800 wide).


* or whatever the sensor size is. apply your own sizes/ratios.
 
If you want to make a smaller "zoomed-in" crop like you see when others post "100% crop" you just crop (at whatever zoom) and it will display at 100% (if you've cropped small enough).
 
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