[Gimp-user] Using channels to select pixels
Hello again guys. I'm working through a tutorial made by photoshop: http://colorburned.com/2010/07/create-a-refreshing-beer-themed-poster-design-in-photoshop.html?utm_source=feedburnerutm_medium=emailutm_campaign=Feed:+Colorburned+(Colorburned+|+Graphic+design+resources,+tutorials,+and+more!) Step 24 is interesting. Water spray is seperated from a background colour, using a manipulation of channels. I can't seem to figure out how to the same thing in gimp. Any idea how I can do it? -- bob (via www.gimpusers.com) ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Using channels to select pixels
Step 24 is interesting. Water spray is seperated from a background colour, using a manipulation of channels. I can't seem to figure out how to the same thing in gimp. Any idea how I can do it? There may be an easier way, but what I will do is decompose the layer to a new image. Identify the decomposed layer that gives the best match to the desired selection, then drag that layer into the channel panel of your original image. You can then load it as a selection, and further use quickmask mode to tweak it. -Rob A ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Using channels to select pixels
Quoting bob for...@gimpusers.com: I'm working through a tutorial made by photoshop: : : Step 24 is interesting. Water spray is seperated from a background colour, using a manipulation of channels. I can't seem to figure out how to the same thing in gimp. Any idea how I can do it? The process is fairly similar for GIMP. 1. Open your Channels Dialog (Windows-Dockable Dialogs-Channels) 2. Click and release once on the thumbnail preview of the color channel which offers the highest contrast. (see Note below) 3. Hold down the mouse button (while over the preview thumbnail), drag the channel to the window in the lower part of the dialog, and release the mouse button. 4. Click on the red, square button at the bottom of the dialog to turn the recently dropped channel into a selection. 5. Go back to your Layers Dialog and continue with the tutorial. Note: The Step #2 is necessary because clicking on the thumbnail toggles whether the channel is active (highlighted). In this case, the first click (in Step #2) disables the channel; while the second click (in Step #3) re-enables it. Basically, you just want to ensure that all your channels are active (highlighted) after doing your drag-n-drop. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Using channels to select pixels
Forget everything I posted (sorry). Here is an easier way: 1. Open your Channels Dialog (Windows-Dockable Dialogs-Channels) 2. Right-click on the preview of the channel with the highest contrast and select the Channel to selection command. Quoting saulgo...@flashingtwelve.brickfilms.com: Quoting bob for...@gimpusers.com: I'm working through a tutorial made by photoshop: : : Step 24 is interesting. Water spray is seperated from a background colour, using a manipulation of channels. I can't seem to figure out how to the same thing in gimp. Any idea how I can do it? The process is fairly similar for GIMP. 1. Open your Channels Dialog (Windows-Dockable Dialogs-Channels) 2. Click and release once on the thumbnail preview of the color channel which offers the highest contrast. (see Note below) 3. Hold down the mouse button (while over the preview thumbnail), drag the channel to the window in the lower part of the dialog, and release the mouse button. 4. Click on the red, square button at the bottom of the dialog to turn the recently dropped channel into a selection. 5. Go back to your Layers Dialog and continue with the tutorial. Note: The Step #2 is necessary because clicking on the thumbnail toggles whether the channel is active (highlighted). In this case, the first click (in Step #2) disables the channel; while the second click (in Step #3) re-enables it. Basically, you just want to ensure that all your channels are active (highlighted) after doing your drag-n-drop. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] Using channels to select pixels
What are you describing goes beyond my comprehension of gimp. If you have the time, I'd love it if you could break that down for me. Decomposition was simple enough once I'd figured it out. After I read you email, I looked up the docs to discover what quickmask is, and I think I understand that. But I'm afraid that I couldn't figure out how to drag a channel of the newly decomposed image into the channels panel of the original image. -- bob (via www.gimpusers.com) ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Using channels to select pixels
What are you describing goes beyond my comprehension of gimp. If you have the time, I'd love it if you could break that down for me. Decomposition was simple enough once I'd figured it out. I think SG's solution is simplest to use. -Rob A ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
