[Gimp-user] subtract selection control
I've got a rectangle selection. Now, I am trying to do a subtractive selection within that rectangular selection, to make a sort of picture frame selection. The problem is that I'm having trouble getting the inner, substractive selection centered within the first rectangle. When I use the ctrl key while selecting, it grows a rectangle and I can't figure out where to start the growth so it is centered. Very hard to do. When I try to use the tool settings dialog to push the subtractive selection option, the selection doesn't even seem to work? Any solutions? Gimp 2.2.13, Debian linux thanks, Chad ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] 300 dpi screen capture
I'm trying to take some screen captures that will be used in a book. How do I set the resolution / dpi of the screen capture device? I tried setting the defulat new image parameters, but it doesn't seem to be used by the screen capture device. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] 300 dpi screen capture
Does this mean it's impossible to get a good looking screen capture into a book? I'm not sure I follow. On Fri, Feb 22, 2008 at 3:25 PM, Patrick Shanahan [EMAIL PROTECTED] wrote: * ChadDavis [EMAIL PROTECTED] [02-22-08 17:21]: I'm trying to take some screen captures that will be used in a book. How do I set the resolution / dpi of the screen capture device? I tried setting the defulat new image parameters, but it doesn't seem to be used by the screen capture device. not worth the bother as screen resolutions are 75-100 dpi. You get that which it is. -- Patrick Shanahan Plainfield, Indiana, USAHOG # US1244711 http://wahoo.no-ip.org Photo Album: http://wahoo.no-ip.org/gallery2 Registered Linux User #207535@ http://counter.li.org ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] 300 dpi screen capture
Isn't Patrick saying, basically, that since my screen has a fixed physical resolution, that's about the limit i can expect to actually get? On Fri, Feb 22, 2008 at 3:38 PM, David Gowers [EMAIL PROTECTED] wrote: You can use Image-scale image to directly set the DPI. In X11 it's possibly to directly set the dpi of the screen; however if you did that, printing would probably be huge (as patrick says, typical display devices are 75..100 DPI) If it were me, I'd write a script I could use from GIMP to set image DPI to 300,300. the pdb call needed is gimp-image-set-resolution (image, 300, 300) On Sat, Feb 23, 2008 at 8:47 AM, ChadDavis [EMAIL PROTECTED] wrote: I'm trying to take some screen captures that will be used in a book. How do I set the resolution / dpi of the screen capture device? I tried setting the defulat new image parameters, but it doesn't seem to be used by the screen capture device. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] 300 dpi screen capture
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. HammelPrincipal 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 Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] blurry images after scaling down
I'm down scaling some tif images. These images are created with a graphics software for making diagrams and the like. Geometric shapes and text mostly. When I open the tif in Gimp they are perfectly crisp. When I scale the image down in size, it becomes slightly blurry, even when opting for the best cubic algorithm. Is this to be expected? What's the best practice for preparing graphics so that they are crisp? I thought i should make them large and that way they would have extra resolution. But apparently scaling down is a lossy practice? Thanks, Chad ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
