[Gimp-user] Gaussian Blur using only the selected area
I've used the GIMP for several years and I'm trying to repeat a technique I'm sure I used to be able to do. Often in a photo, I want to select an area and gaussian blur it to reduce noise (for example select the sky and clean up the CCD noise). Current versions of the GIMP (I'm using 2.2.11 from the Ubuntu 6.06 AMD64 repository) perform the gaussian blur on only the selected pixels but they pick up colour values from outside the selected area, causing bleed into the selection. I would like the gaussian blur to only use colours from inside the selection. I do not want to use a more automatic technique like Selective Gaussian Blur - that is not the solution I need. Just so there is no confusion, here's a quick way to see exactly what I mean. Create a new image - 128x128 will be fine. Fill the background with Black (if it isn't already). Switch to Pencil (press N) and put a white blob on top of the black background. Use the Select Contiguous Pixels (press Z) to select the white blob. Choose the Filters-Blur-Gaussian Blur plugin. Using a 15 pixel horizontal and vertical blur, blur the image. You will see that the black background bleeds into the white blob inside the selection. What I would like to happen is that no visible change should occur in this example - the white selected blob is already a constant shade and should not show any change under a gaussian blur. I've tried tricks like cutting out the selected area into a new layer and performing the blur on the new layer. That is no better. My searches seem to suggest that Photoshop can limit the blurring to the selected area's colours if the layer is locked (which is also pretty obscure). The worst part is I'm sure that the gimp blur routines used to only take colour values from the selected area. Maybe I'm just going nuts... Thanks, Toby Haynes ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] How to move the white point?
Hello. How do I move the white point in GIMP? All three photos below were taken with the camera. How could I reproduce the photo 3 from photos 1 and 2 in GIMP? That is, assume I don't have the photo 3 below but I want something close. http://www.funet.fi/~kouhia/whitepoint1.jpg % wrong whitepoint http://www.funet.fi/~kouhia/whitepoint2.jpg % wrong whitepoint, example white http://www.funet.fi/~kouhia/whitepoint3.jpg % whitepoint based on example white Juhana -- http://music.columbia.edu/mailman/listinfo/linux-graphics-dev for developers of open source graphics software ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] Re: Gaussian Blur using only the selected area
Hi, [EMAIL PROTECTED] (2006-08-07 at 1138.09 -0400): I've tried tricks like cutting out the selected area into a new layer and performing the blur on the new layer. That is no better. My searches seem to suggest that Photoshop can limit the blurring to the selected area's colours if the layer is locked (which is also pretty obscure). The approach based in transparency should work... or http://bugzilla.gnome.org/show_bug.cgi?id=70335 family (look at dependences, 72848 and 72849 are blur) is not fully fixed. GSR ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Re: Gaussian Blur using only the selected area
GSR - FR wrote: Hi, [EMAIL PROTECTED] (2006-08-07 at 1138.09 -0400): I've tried tricks like cutting out the selected area into a new layer and performing the blur on the new layer. That is no better. My searches seem to suggest that Photoshop can limit the blurring to the selected area's colours if the layer is locked (which is also pretty obscure). The approach based in transparency should work... or http://bugzilla.gnome.org/show_bug.cgi?id=70335 family (look at dependences, 72848 and 72849 are blur) is not fully fixed. There still appear to be issues to be worked out (I've just tried 2.2.12 to see if it is any better) with the transparency approach. Even so, being able to limit the gaussian blur to only use colour values from the selected area would be extremely useful. In other words, rather than relying on the alpha value of the pixel to affect its weight in the gaussian blur, use the selection weight of the pixel. Does such an option exist? Maybe it's worth trying to alter one of the existing gaussian blur plugins to behave like this? Thanks, Toby Haynes ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] Gimp refuses changed images
When I change an image in Gimp I cannot write down the changed image The message is: Access denied. How to operate to avoid that message? Thanks Andre den Oudsten ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] Deckle edge around a graphic
On another list an earnest soul, obviously working in something like MSWord, wanted a way to put a deckle edge around a pullout which I presume is a graphic. Here is a quote: I'm trying to find a software program that would allow a pull-out to look like a letter - that is, instead of just a straight-lined or wavy box, something that looks like it has ragged edges. anyone out there have any experience with this? Now I am sure that with some fiddling one could create a deckle edge graphic and then dupe it around a graphic. But is there a more straightforward method in Gimp? - John Culleton Able Indexing and Typesetting Precision typesetting (tm) at reasonable cost. Satisfaction guaranteed. http://wexfordpress.com ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] How to move the white point?
On Mon, 2006-08-07 at 19:41 +0300, Juhana Sadeharju wrote: Hello. How do I move the white point in GIMP? All three photos below were taken with the camera. How could I reproduce the photo 3 from photos 1 and 2 in GIMP? That is, assume I don't have the photo 3 below but I want something close. http://www.funet.fi/~kouhia/whitepoint1.jpg % wrong whitepoint http://www.funet.fi/~kouhia/whitepoint2.jpg % wrong whitepoint, example white http://www.funet.fi/~kouhia/whitepoint3.jpg % whitepoint based on example white Hi. Check out the levels tool. There is a grey point picker which allows you to define a 'neutral' color and adjust the image 'automagically'. cheers -- Jakub Steiner [EMAIL PROTECTED] ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] Screen capture in MSWIndows.
Linux Gimp has a very useful screen capture function under the acquire menu. It seems to be separate and apart from kcapture---at least the interface is different. Is there a comparable screen capture capablity on Gimp for MSWindows? -- John Culleton Able Indexing and Typesetting Precision typesetting (tm) at reasonable cost. Satisfaction guaranteed. http://wexfordpress.com ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Screen capture in MSWIndows.
At 02:07 PM 8/7/2006, John R. Culleton wrote: Is there a comparable screen capture capablity on Gimp for MSWindows? In Gimp 2.2.11 for windows there is an aquire option under the file menu with several sub-options under that. You can also hit the Print Screen button and then do a paste. Matt ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
