Cropping in Photoshop - DPChallenge Forums

Tamron SP AF 28-75mm f/2.8 XR Di for Canon

05/31/2005 04:18:08 PM · #1

two weeks ago I shoot my first wedding (I'll post some shoots later).

I'm know resizing the images to put on line proofs and to print them.

So I'm resizing them to be 15x20 cm (I think is 8x10 inc in inches) at 300 dpi.

But one thing is giving me thoughts: I go to the crop tool and set it to centimiters, and the size I whant. But sometimes the image don't have enough pixels to give it 300dpi in the size I tell it to crop. So what does photshopo does in this cases? Does it interpolate the image to ad the other pixels or does it decreases dpi rate?

What do you do when you want to transform a lot of pictures in a specific size? Do you do it one by one? Because my 6mp images are 3000x2000 pixels, whith is 1.5 horizontal versus vertical, and 15x20 cm is 1.33 horizontal versus vertical, and I don't feel confortable in letting the Fuji lab machine decide what part of the image is to trow off.

Any thoughts?

strangeghost

Canon EOS-7D

05/31/2005 04:23:32 PM · #2

If you have PS's crop tool set to 300 dpi, it will interpolate and add pixels as it needs to. BTW, with your 6mp camera, there's no need to stick to 300 dpi as the standard for quality prints. You'll do fine with 200 dpi or even as low as 150 and still get outstanding quality prints. You have plenty of pixels there for 8x10s.

-J

kirbic

Canon EOS R5

Canon RF 24-70mm f/2.8 L IS

05/31/2005 04:27:36 PM · #3

Yoiu defintiely need to be the one to decide how to crop. This will mean individual attention to each image. Photoshop will resample up to 300dpi if that is what you have it set to.

gaurawa

Canon EOS-5D Mark II

Canon EF 24-105mm f/4.0L IS

05/31/2005 04:31:31 PM · #4

Originally posted by Nuno:

So I'm resizing them to be 15x20 cm (I think is 8x10 inc in inches) at 300 dpi.

15x20 is 3x4 ratio, not the same as 8x10 (4x5 ratio )
8x10" should 20cm x 25cm approx.

cpanaioti

Canon EOS-40D

Canon EF 70-300mm f/4.5-5.6 DO IS USM

05/31/2005 04:33:49 PM · #5

2.5cm ~= 1 in

Canon EF 24-105mm f/4.0L IS

05/31/2005 09:09:00 PM · #6

So is it preferable to drop the dpi count to 200 or 150 than to set it to 300 dpi here some interpolation will occur? Can it be noticed any difference?

gaurawa

Canon EOS-5D Mark II

05/31/2005 09:15:41 PM · #7

I normally crop without specifying any dpi count and then up-sample for large prints. I don't want the crop tool to resample, it should just crop.

Tamron SP AF 28-75mm f/2.8 XR Di for Canon

06/01/2005 06:50:11 AM · #8

And how can I crop withought resamlping, knowing the horizontal versus the vertical rate? just doing it "by eye" doesen't seems right, because if you don't get the exact ratio the printing lab will crop it for the printing size or resample it to fit the image, isn't it?

Any other thoughts about how you handle this kind of workflow?

ganders

Canon EOS-40D

06/01/2005 06:56:45 AM · #9

Originally posted by Nuno:

And how can I crop withought resamlping, knowing the horizontal versus the vertical rate?

If you're using the crop tool, set the width/height you want and leave the resolution empty - PS will then use that aspect ratio but not do any resizing for you.