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by Christoph Belanger on Sat Mar 31, 2012 7:11 pm
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I'm in the process of creating a very large 60x40 print. Before I print it, however, I'd like to create a 8x10 proof of a section with a lot of detail. What is the best way to do that?
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by Royce Howland on Sat Mar 31, 2012 7:49 pm
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Interpolate the entire image up to 60x40 inches at whatever PPI your printer (or printing service) requires, and do whatever output stage sharpening or other finishing steps you plan to do. Then crop out one or more 8x10 inch segments (without any further up- or down-sampling in the crop tool) and have the crops printed for evaluation.
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by Christoph Belanger on Sun Apr 01, 2012 8:30 am
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Royce Howland wrote:(without any further up- or down-sampling in the crop tool)
This is where I am stuck. How does one do that?
Christoph

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by Royce Howland on Sun Apr 01, 2012 9:04 am
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I'll assume you're using some version of Photoshop. Put 8 x 10 (or 10 x 8 ) into the crop tool as the parameters for the aspect ratio, units of inches or cm. But clear the other fields to disable resampling.
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by Christoph Belanger on Sun Apr 01, 2012 9:26 am
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I'm sorry.... I am feeling really dense here. I am using Photoshop CS5.

What you suggested above is exactly what I've done... but I don't see any other fields for the crop tool - all I see is resolution (which is left at 300), "front Image" and "clear."

What else should I be seeing?
Christoph

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by Randy Mehoves on Sun Apr 01, 2012 10:36 am
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What Royce is saying is to take the resolution (yours is saying 300) highlight it and then delete. If you don't do that you will change the crop from whatever resolution that you have set for the entire image for printing.
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by Royce Howland on Sun Apr 01, 2012 11:12 am
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Christoph, here's a screenshot of my CS5 crop tool. I've put in an 8x10 crop ratio (units inches, which is the default in my setup), and cleared the resolution. The simplest way to clear the fields is to click the Clear button.
Image
When the Resolution field is cleared, the units of inches or centimeters in the Width & Height fields doesn't really matter -- no re-sampling will occur, so the given dimensions are just treated as a unitless aspect ratio crop. Just don't use units of pixels ("px") for the dimensions, because that will always trigger a resampling to the exact pixel counts you give in Width & Height, even if Resolution is cleared; you don't want that behavior here.
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by Christoph Belanger on Sun Apr 01, 2012 6:17 pm
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i'm sorry but I am still having a hard time with this. Perhaps I am not explaining clearly what I need or perhaps I am not understanding something here...

I've done everything that was suggested. But here is the issue, when I follow your instructions, I can pretty much crop the entire image (using extremes to demonstrate) to 8x10; to confirm size i click Front Image which then gives me the entire image at 8x10 with a resolution of 1129.1.

That's not exactly what I am looking for. What i want is a section of the print that measures 8x10 at a resolution of 300, i.e. I would like it to be 1:1 (but just a corner of the actual print, for example; kind of like a cookie cutter). I ended up using the crop tool as suggested but I also used the ruler to give me the exact measurements, I thought there might be an easier way to accomplish this.

Anyway... thanks for all you help.
Christoph

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by dbostedo on Tue Apr 03, 2012 2:23 pm
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Doesn't the crop tool always resample/resize since you can click and drag? I'd use the rectangular selection tool set to a fixed size - there's no "click and drag" going on then and you can be sure you're getting an 8x10 at the ppi that you want. Then simply cut and paste the selection into its own file, or crop the rest of the image away.

EDIT : Just confirmed that the crop tool can always resize. A rectangular marquee selection with a fixed size works just fine.
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by nash30 on Tue Apr 10, 2012 2:50 am
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dbostedo wrote:Doesn't the crop tool always resample/resize since you can click and drag? I'd use the rectangular selection tool set to a fixed size - there's no "click and drag" going on then and you can be sure you're getting an 8x10 at the ppi that you want. Then simply cut and paste the selection into its own file, or crop the rest of the image away.

EDIT : Just confirmed that the crop tool can always resize. A rectangular marquee selection with a fixed size works just fine.
great tip! crop tool can also be used to increase any canvas size. It can also be used to rotate and re-sample images..
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