This is not a Nikon-specific question, but just thought I'd post it here as I'm a Nikon guy.
After I download in RAW and then save as a JPG, I find that my images are defaulted at 240 ppi. I use a D700, if that has anything to do with it. I have some friends with D60s whose JPGs come out at 72 ppi.
I'm just wondering is there a camera setting that determines what resolution the JPG will be, or is this a PhotoShop thing, or what? Is there any way to control that?
It depends on the software, but means nothing. 72 is the default in most cases. The total image size is the same X by Y pixels. Resizing pixel dimensions (resampling) is another issue.
Yeah, I know it means nothing. Someone asked me about it, I didn't have an answer, and I've always wondered about it. So it's the software that has the default of looking at it at 72 ppi or 240 or whatever?
Is there any reason to post stuff on the web at higher than 72dpi? I've heard some monitors will display 96dpi, so I sometimes save JPEGs at that resolution. Does that make any difference?
It's definitely not for the web. I'm talking about after I work it in Adobe Bridge, I then open it in PhotoShop --and that's when I notice the differences in resolution. Mine always open at 240, others come in at 72. I"m just wondering if there's a way to set the default at 300.
The only issue is that when you open in PS at 72 ppi, the image is HUGE because the pixels are so spread out per inch. At 300 ppi, it's a more manageable image and it's set at the resolution I want anyway.
the only numbers that matter to a web browser are the number of pixels in each dimension. you can have 10000 dpi and it won't make any difference to any browser. it only makes a difference to programs that decide they will honor the dpi.
Herb...
Steve Carlton wrote:
Is there any reason to post stuff on the web at higher than 72dpi? I've heard some monitors will display 96dpi, so I sometimes save JPEGs at that resolution. Does that make any difference?
i've never see this in any of my versions of Photoshop since 2.5.
Herb...
friscoron wrote:
The only issue is that when you open in PS at 72 ppi, the image is HUGE because the pixels are so spread out per inch. At 300 ppi, it's a more manageable image and it's set at the resolution I want anyway.
The dpi (ppi) value is nothing else but metadata, and changing it has as much effect to the image as changing the Description or Author tags -- nothing. The dpi value establishes the relationship between the pixel size and the physical paper size. For example, 300dpi at 11 inches = 300*11 = 3300 pixels. Changing the dpi value you can make the same pixels print smaller or larger (i.e. how many pixels you want to compress into a single inch).
It's mainly used in the publishing industry. If you scan a piece of paper or engineering drawing, you want to know how large the original paper was. Changing the dpi value alone doesn't change the image's pixels themselves, only the calculated physical paper output size. If you want the image to print twice as large, make the resolution half that much. You'll have the same amount of pixels, though.
In Photoshop CS3 and CS4 open Photoshop click on "photoshop" in the menu bar and go Preferences > Units and Rulers > and in the "new Document Preset Resolutions set print to 300 pixels inch or whatever resolution you desire.
For display resolution , if you are working on an LCD type display take the number of pixels at full resolution for your display divide by the width in inches and that will tell give you your Screen resolution. For my 20" iMac that is 98ppi. For my Eizo CG222W it is 100ppi.
Setting Screen Resolution accurately means that one pixel in the image will equal 1 pixel on the screen when yo uare at 100% magnification.
Now click on the "OK" button and quit Photoshop. The next time you open it your new settings will take effect.
The 72 ppi convention is an relic of a long-ago time when browsers used it as a standard. All modern browsers simply map one pixel in the image to one pixel on your monitor.
Ppi (pixels per inch) makes a great difference when printing (dpi (dots per inch), however, has nothing to do with this--it's the number of dots of ink a printer lays down per inch). A 300 pixel-wide image printed at 300 ppi will be one inch wide, while the same image printed at 100 ppi will be three inches wide. Most people are comfortable printing at resolutions between 172 (web-offset standard) and 300 ppi.
it depends on if you have the resample box checked or not. if not, nothing happens except metadata changes. if you have resample checked then it does what it says, it changes the dpi to preserve the image dimensions.
Herb...
austinstrobist wrote:
So then are you saying that resizing a JPEG from 300 to 72 and then back to 300 will not have any loss in quality?
240-300 dpi(ppi) are meant for printing and 72 is for Web. If you want to save for web, in CS3/CS4 go to File>>save for Web option. There keep the quality 100% and comedown set the pixel size. I normally keep the longest side between 600-800 Pixels. Leave all the defaults.Save the file and open again and add just bit sharpening for Web. YOU ARE GOOD TO GO. "Save for Web does all teh conversion for you.
