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customer wants 300dpi images ?
Old 03-01-2007, 08:50 AM   #1 (permalink)
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In photoshop I see in the image size window a place that says Resolution 72 pixels / inch . To get 300 dpi do I just change the 72 to 300 and save it ?

They are printing a catalog and they need 300 dpi.

Mike
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Re: customer wants 300dpi images ?
Old 03-01-2007, 09:08 AM   #2 (permalink)
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Quote:
Originally Posted by That_Look_Photo View Post
In photoshop I see in the image size window a place that says Resolution 72 pixels / inch . To get 300 dpi do I just change the 72 to 300 and save it ?

They are printing a catalog and they need 300 dpi.

Mike
Yes
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Re: customer wants 300dpi images ?
Old 03-01-2007, 09:11 AM   #3 (permalink)
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There are som stronger PS experts here than me but I'd say defintiely not by your description. If you go into the menus and select "image size", you will have a number of boxes come up in a window that will tell you the overall size of the image, the pixel and inches size of the image and towards the bottom, the resolution of the image. In this resolution box, you will hopefully see a resolution of 300, not 72 unless you either shoot with a low megapixel camera or have resized it previously. If you have an image whose resolution is only 72, then find the original size or .....

1. upsize the image in no more than 10% steps (this will give you a better result than going straight from 72 to 300 but it's not great)
2. buy one of the commercially available resizing programs that have specific algorithms for upsizing images and making them look good.

Hope that helps...
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Re: customer wants 300dpi images ?
Old 03-01-2007, 09:15 AM   #4 (permalink)
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The short answer is - yes. You can change a 72 dpi image to 300 dpi by going to IMAGE-IMAGE SIZE and changing the resolution to 300 dpi. BUT -- before you increase the resolution of any image, keep in mind that changing a low resolution image (72 dpi) into higher resolution images (300 dpi) won't give you a better looking image ... in fact, your image will have a more grainy look.
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Re: customer wants 300dpi images ?
Old 03-01-2007, 09:23 AM   #5 (permalink)
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Should my canon 20d output 300 dpi ? My problem is the people that want the 300 dpi images have the only copys. It was a shoot I did a year ago for them. They just wanted images for there website/store . Now they want a printed catalog from the images and they told me the images were all 72 dpi.

Should I tell them they are out of luck ?

Mike
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Re: customer wants 300dpi images ?
Old 03-01-2007, 09:40 AM   #6 (permalink)
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I'm not an expert either, but I pay no attention to the camera output dpi. I crop the image at 300 dpi and have never had an upsizing problem. You can crop to the full frame and give them the 300 dpi cropped image. But you may want to talk with them and tell them what you have. Most mags know how to resize images.

And, if you do upsize, as others have said, do it in small increments - 10% at the most at a time.
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Re: customer wants 300dpi images ?
Old 03-01-2007, 10:41 AM   #7 (permalink)
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Asking for a specific DPI doesn't make sense unless they give you the intended size in inches as well. DPI is only used when actually printing. It's dots per inch, so in this case, size matters. And technically, DPI should only apply to the ink dots. When talking about a digital image being printed, it should be PPI, or pixels per inch. A lot of people use DPI to mean both though.

3000 pixels x 3000 pixels @ 300 PPI = 10" x 10"
3000 pixels x 3000 pixels @ 100 PPI = 30" x 30"

It's like ISO/shutter/aperture. They are all tied together. You can't state an exposure by just saying "the shot needs to be at f/5.6."

They should be giving you a minimum pixel x pixel size. You probably won't be able to talk sense into them though. To mollify them, turn off resampling and just set the PPI. You'll see that the number of pixels stays the same but the number of inches changes. The actual quality and look of the image will stay exactly the same. The resulting size in inches will give you a good idea of the max size that the image can be printed at.

Some printers will require 300 PPI images because the printer prints at 300 DPI and needs to do one ink dot per pixel. For something like a catalog, the image is going to be embedded inside another document, so it's going to be resized anyway.
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Re: customer wants 300dpi images ?
Old 03-01-2007, 12:16 PM   #8 (permalink)
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I'd go back to the raw files and start from scratch. 72 to 300 is a big jump.

E
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Re: customer wants 300dpi images ?
Old 03-01-2007, 12:28 PM   #9 (permalink)
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Yep, your 20D can output to 300 dpi/ppi. If you have the original files you're OK, if not, the 72 to 300 upsizing won't pretty.
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Re: customer wants 300dpi images ?
Old 03-01-2007, 01:44 PM   #10 (permalink)
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I wish I could do that. But it seems they no longer have the raw files. I gave them the raw files and a copy of the jpg files on two dvds. Now the raw files are gone and they are stuck with the jpgs.

Mike
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