But doesn't this mean that if my the portion of the screen that I'm interested in is only 3 by 5 or so, then there is basically no way to get a non extrapolated set of pixels that will print to 3 by 5 on the page?
On Fri, Feb 22, 2008 at 3:57 PM, Michael J. Hammel < [EMAIL PROTECTED]> wrote: > On Fri, 2008-02-22 at 23:41 +0100, Daniel Hornung wrote: > > But maybe one of the > > actual book writers on this list may tell you more. *hint* > > I guess that's my cue. :-) > > The screen resolution is in pixels. One pixel = one dot. Most monitors > give you between 72 and 100 DPI, or dots per inch. You'll notice that > you have a monitor that is 15"-24" inches across depending on how they > measure such things. So you have 72*15 = 1080 dots across the screen > for the 15" monitor. Now how do you convert that to printing for a > book? > > Well, in the book you want the same image but at a smaller size. A > typical book is likely less than a typical piece of paper (around 8.5"). > In fact, the actual image size is likely to be around 2"-4" across. So > what DPI do you need to squeeze 1080 dots into (splitting the > difference) 3"? 1080/3 = 360DPI. If you set your image resolution > (using Image->Scale Image and changing the X and Y resolution) to 300 > DPI, then your image will be 3.6" across. How do I know this? > > 1. Create a new image (blank white background) at any size. > 2. Image->Scale Image, then set the width to 1080 pixels. Click on > "Scale" to scale the image to that size. > 3. Image->Scale Image, then set the resolution to 300 for the X and Y > resolution. Click on "Scale" to change the image resolution. > 4. Image->Scale Image, then change the options menu next to the "Height" > field from pixels to inches. Now you can see how wide your image is > going to be when it's 1080 pixels across. > > Clear as mud? Try it a few times. It's not that hard to grasp once you > see it in action. > -- > Michael J. Hammel Principal Software > Engineer > [EMAIL PROTECTED] > http://graphics-muse.org > > ------------------------------------------------------------------------------ > He doesn't have ulcers, but he's a carrier. > -- From a real employee performance evaluation. > > _______________________________________________ > Gimp-user mailing list > [email protected] > https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user >
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