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Cropping an image and keeping quality

alan watt , Sep 16, 2010; 02:00 p.m.

Hi,
I went out on one of my 1st street photography shoots last week and took a pic of a man sitting on a bench.
I used my 50mm lens and couldnt get too close.....when you see the pic you will understand why.
He was slightly mental to say the least.....by the time I took the snap and he yelled at me and it was time to leave.
Anyway.....what I need to do is to crop the rather useless backround right down and make him the main focus in the shot but I dont want to lose too much quality.
What is the best method for this?
I am using CS4.

Cheers,
Al

Responses


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Jeff Ford , Sep 16, 2010; 02:05 p.m.

Hope you gave him something..... karma

Monika Epsefass , Sep 16, 2010; 02:31 p.m.

Ask before you take a picture? You might get closer and don't need to crop later...

alan watt , Sep 16, 2010; 03:04 p.m.

So no tips? Hang on...he wasnt looking at me until I started to compose...then he did when I snapped....I have only just started using the 50mm as apposed to my zoom.....help would be nice.....

John A , Sep 16, 2010; 03:04 p.m.

Obviously a few people don't understand the word "mental"!

All you can do is process the raw as you like, output it as a PSD or tiff and crop it. You are going to lose all those extraneous pixels regardless of anything you can do. Keeping it as a Tiff or PSD keeps whatever quality you can save in tact.

Mike Stemberg , Sep 16, 2010; 03:15 p.m.

..and if the crop needed is way too small compared to the full frame, you may have to add some more sharpening.
and Hey! I shoot street too, and that sort of thing do happen occasionally. And conversely, there are times when people feel honoured of the attention and then will do ask you ask (i.e pretend they don't know you are shooting them) to best show themselves in the images.

alan watt , Sep 16, 2010; 03:17 p.m.

Thanks...its was in the UK...a place called Newcastle...and I was attempting 'candid', so you cant really ask can you?
Here is my 1st attempt.

alan watt , Sep 16, 2010; 03:21 p.m.

oops...sorry!


try again!

John Deerfield , Sep 16, 2010; 03:22 p.m.

In general, quality refers to compression while quantity refers to megapixels. The more megapixels you have, the more you can crop in on an image. If you use the Marquee tool in Photoshop, you can select your desired aspect ratio and crop the image with no loss of quality, just cropping away the pixels you don't want. Then, under image, you can check the image size and see what kind of resolution you have for your crop and whether that is sufficient for your purposes. If it isn't sufficient, your only choice is "uprez" the image using Photoshop or another program designed for such a purpose. At this point, you will being to lose quality since the application is adding resolution that wasn't there in the first place. However, as to how visible any such loss will be depends on a number of factors, not the least of which being how well the original image was captured.

Ken Papai , Sep 16, 2010; 03:24 p.m.

You succeeded Alan, nicely done (with the crop and the capture).

However you give the experts little to go -- 6MP original or 22MP? As you hopefully know, the more MP's you start with the "higher quality" your crops are gonna be (also factoring in sharp glass and proper technique -- e.g., using the 'sharpest' aperture for the lens as well as higher shutter speed and proper focus) when you display or print them.


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