Re: [Gimp-user] black & white
No problem - I agree with you that using varied procedures to do things produces a better understanding of the tool as a whole. If education is your goal, then I think that already, you have learned a large number of options to convert an image from color to black and white. To get even deeper into image manipulation, you might try using the selection tools, including the quick mask (button in lower left-hand corner) to enable working on only a selection layer, as opposed to the whole image. Something I also just realized about the Photoshop tutorial you referenced that might make more sense in GIMP is to use multiple layers as your "image history". You can use layers in one or two ways in the GIMP. Naturally they good for distinguishing between parts of an image. For example you might have one layer containing a field, and a second layer containing a small house, placed on top of the first layer. Also using layers, you could create copies of your image as you make changes, in effect creating your own rudimentary filter stack (like those found in Adobe/Macromedia products.) At any rate. Keep asking questions. Keep experimenting. The GIMP is one of the most powerful image manipulation tools in the world. The only thing that might make it appear less is the lack of pre-programmed plugins, I suppose. But it incorporates all of the granular functionality of commercial tools easily, like Photoshop or Illustrator. Nathan On Mon, Apr 14, 2008 at 9:39 AM, norman <[EMAIL PROTECTED]> wrote: > Thank you very much indeed for the comprehensive and interesting way you > have dealt with my original question. I have no doubt that using layers > in GIMP coupled with the use of layer masks and curves gives a far > superior method of converting colour to black & white. However, I do > like to try as many methods as possible as part of the learning curve. > Sometimes an old procedure gets over looked simply because it is old. > > Norman > > > -- Nathan Lane Home, http://www.nathandelane.com Mirror, http://nathandelane.awardspace.com ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] black & white
Last attempt... ...of course between the layers that GIMP has and the Channels, I'm sure that it is not impossible to emulate adjustment layers. You should note that each layer in the GIMP is fully functional. Some things you can do with them include applying a filter, like dodge, burn, multiply, or overlay, which works non-destructively on the entire layer. I'm guessing from your response, Norman, that none of us were answering correctly, that I didn't look at the Photoshop tutorial very well that you referenced in your original question. Looking at the tutorial more closely, here is what I'd suggest resembles the tutorial in your first post, but it requires two less layers than the four given in the tutorial for Photoshop: 1. Load the photo in question 2. Duplicate the "Background" layer by clicking on the Duplicate (or copy layer) button in the Layers dialog 3. Click on the "Background Copy" layer in the Layers dialog 4. Adjust the Mode for this layer by clicking on the Mode drop-down box and selecting Hue (near the bottom) 5. Right-click on the image 6. Select Colors > Hue-Saturation... 7. In the Hue-Saturation dialog, move the Saturation slider down (in a negative direction) until you get the black and white levels you desire. That's as close as I can get to the same thing. In my opinion the GIMP's is much more straight-forward - namely have filters on discrete layers, rather than Photoshop's having a filter stack. Nathan I attached a zip archive containing the three images I worked on using the technique described above. And a fourth that is only slightly desaturated. I couldn't get these to you, so here are some links to them - they are GIMP 2.4 XCF files, so you'll see all of the layers and such when you load them in GIMP: http://www.mediafire.com/?j0gdzitgg2y http://www.mediafire.com/?xgaipryzm31 http://www.mediafire.com/?pgywazmwgeo http://www.mediafire.com/?dgzi99gmjos The original stock photograph used is attributed here: http://www.sxc.hu/photo/981014 Daniel Hornung said: > > There are no such things as adjustment layers in GIMP... -- Nathan Lane Home, http://www.nathandelane.com Mirror, http://nathandelane.awardspace.com ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] black & white
On Sat, 2008-04-12 at 16:22 +0200, Rolf Steinort wrote:> < snip > > I don't get what the lower layer does. I'll ask a friend an d report > back. Perhaps there is something interesting in it. > Nothing interesting. I just talked to John Arnold from http://photowalkthrough.com/ (worth to look into even for Gimp users). He told me that this is an old method and has less control than the channel mixer. The lower layer just rotates the colours. That leads to a different luminosity and so to different monochrome output. Rolf ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] black & white
On Sat, 2008-04-12 at 12:48 +0100, norman wrote: > < snip > > > > There are no such things as adjustment layers in GIMP, but in one of the > > future versions, much more powerful tools will be available to allow > > non-destructive editing. You can do pretty much of what's done there > > though > > in different ways as mentioned on the page that Tim gave. As to why the BG > > copy 2 layer in your page is b&w, I best quote that page itself: > > > > "the top layer (Background copy) shows where we did a simple 'remove > > colour' > > and have de-selected the 'eye' so as to hide this layer." > > > > The coloured seem to be effectively desaturated with one of the adjustment > > layers. > > Thank you very much indeed. Now I can forget all about the approach I > thought I would look at and concentrate on those ways I know best - the > methods suggested and demonstrated by Ralph Steinort. "Rolf" please! ;-) I think this is basically the same thing that you can do with the channel mixer. In the top adjustment layer they do a "crude" desaturation by simply removing it. You can do that in Gimp by adding a layer filled with black and setting the mode to "saturation". I don't get what the lower layer does. I'll ask a friend an d report back. Perhaps there is something interesting in it. Rolf ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] black & white
< snip > > There are no such things as adjustment layers in GIMP, but in one of the > future versions, much more powerful tools will be available to allow > non-destructive editing. You can do pretty much of what's done there though > in different ways as mentioned on the page that Tim gave. As to why the BG > copy 2 layer in your page is b&w, I best quote that page itself: > > "the top layer (Background copy) shows where we did a simple 'remove colour' > and have de-selected the 'eye' so as to hide this layer." > > The coloured seem to be effectively desaturated with one of the adjustment > layers. Thank you very much indeed. Now I can forget all about the approach I thought I would look at and concentrate on those ways I know best - the methods suggested and demonstrated by Ralph Steinort. Norman ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] black & white
On Saturday 12 April 2008, norman wrote: > > Yes, maybe you should rephrase it, I'd thought that you wanted to know > > methods to have more control than with one of the straightforward > > methods: - Image->Mode->Grayscale (the whole image will be grayscale, > > you'd have to change back to RGB mode to edit with colours again) > > - Colors->Desaturate, which has three predefined modes since GIMP 2.4 > > > > If that's not what you want, maybe you should ask again in a different > > way ;-) > > Right, I could explain but, as it is said, a picture is worth a thousand > words. I was looking at the following and would like to be able to do > what is described, using GIMP:- > > http://www.northlight-images.co.uk/tutorial_pages/elements_2/PSE2_BW.html > > There are 2 things I am puzzled about they are:- how do I create an H/S > Adjustment Layer and why is the background copy in b&w whereas the layer > labelled background is in colour as is Background copy 2. > > Norman There are no such things as adjustment layers in GIMP, but in one of the future versions, much more powerful tools will be available to allow non-destructive editing. You can do pretty much of what's done there though in different ways as mentioned on the page that Tim gave. As to why the BG copy 2 layer in your page is b&w, I best quote that page itself: "the top layer (Background copy) shows where we did a simple 'remove colour' and have de-selected the 'eye' so as to hide this layer." The coloured seem to be effectively desaturated with one of the adjustment layers. signature.asc Description: This is a digitally signed message part. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] black & white
On Saturday 12 April 2008, norman wrote: > I have looked but this does not answer my specific question, > unfortunately. I cannot believe my question was so obscure that no one > has been able to answer it yet. Perhaps it is too simple and I am > missing the point somewhere. > > Norman Yes, maybe you should rephrase it, I'd thought that you wanted to know methods to have more control than with one of the straightforward methods: - Image->Mode->Grayscale (the whole image will be grayscale, you'd have to change back to RGB mode to edit with colours again) - Colors->Desaturate, which has three predefined modes since GIMP 2.4 If that's not what you want, maybe you should ask again in a different way ;-) Daniel signature.asc Description: This is a digitally signed message part. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] black & white
< snip > > > Hello Norman, > http://www.gimpguru.org/Tutorials/ has a lot of thing to add to your list. > But in the end it's up to you to try them out and find for each image the > method that works best. I have looked but this does not answer my specific question, unfortunately. I cannot believe my question was so obscure that no one has been able to answer it yet. Perhaps it is too simple and I am missing the point somewhere. Norman ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] black & white
On Fri, Apr 11, 2008 at 1:24 PM, norman <[EMAIL PROTECTED]> wrote: > I am trying to gather information on how to convert from colour to black > & white. In my searches I came across the following which is in > photoshop:- You might also want to take a look at: http://meetthegimp.org/episode-034-full-control-monochrome-conversion-3/ -- Tim Jedlicka, Network Entomologist [EMAIL PROTECTED], http://www.galifree.com ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] black & white
On Fri, 2008-04-11 at 20:30 +0200, Daniel Hornung wrote: > On Friday 11 April 2008, norman wrote: > > I am trying to gather information on how to convert from colour to black > > & white. In my searches I came across the following which is in > > photoshop:- > > > > http://www.northlight-images.co.uk/tutorial_pages/elements_2/PSE2_BW.html > > > > Could some kind person please explain to me how I do this in GIMP so > > that I can add it to my list of things to try. > > > > Norman > > Hello Norman, > http://www.gimpguru.org/Tutorials/ has a lot of thing to add to your list. > But in the end it's up to you to try them out and find for each image the > method that works best. Thank you. Norman ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] black & white
On Friday 11 April 2008, norman wrote: > I am trying to gather information on how to convert from colour to black > & white. In my searches I came across the following which is in > photoshop:- > > http://www.northlight-images.co.uk/tutorial_pages/elements_2/PSE2_BW.html > > Could some kind person please explain to me how I do this in GIMP so > that I can add it to my list of things to try. > > Norman Hello Norman, http://www.gimpguru.org/Tutorials/ has a lot of thing to add to your list. But in the end it's up to you to try them out and find for each image the method that works best. Have fun! Daniel signature.asc Description: This is a digitally signed message part. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] black & white
I am trying to gather information on how to convert from colour to black & white. In my searches I came across the following which is in photoshop:- http://www.northlight-images.co.uk/tutorial_pages/elements_2/PSE2_BW.html Could some kind person please explain to me how I do this in GIMP so that I can add it to my list of things to try. Norman ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Black/white drawings => black/alpha drawings ?
Thanks to everyone who have helped with suggestions. This is what I came up with: 1) Greyscale. 2) Image -> Colours -> Levels... to turn the darkest colours into plain black, and the brightest colours into white. This is merely a trick to remove "scan-noise". 3) RGB. 4) Filter -> Colours -> Colour to Alpha, then I choose the white colour. Now I have black/alpha instead of black/white. I also used about an hour to find out, that this filter does not work if the ``Keep Trans.'' is checked in the Layers dialog =). Now I can add a white paper background and transparrent layers for colouring. You can see the results of my scans and colouring here: http://stephan.tisprut.dk/Skrammel/scans/ I especially like colouring of the candle; it has a very cool cartoonish look, I think. The old man, by the way, is a drawing I've made of a real person that sometimes travels with the same bus as I. He always has this little briefcase with him ... I am absolutely sure he's a hitman with a sniper rifle in his briefcase, just waiting to be assembled and take out a target!! =) -- Stephan Henningsen / / http://tisprut.dk ___ Gimp-user mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user
Re: [Gimp-user] Black/white drawings => black/alpha drawings ?
1) use the curves dialog to take the light greys and change them to white and the dark greys and change them to black 2) add alpha channel 3) select the white by color 4) edit -> clear should now hav eall the white transparents. but the curves dialog is very useful for making although those greyish specks go white or black as needed. ___ Gimp-user mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user
Re: [Gimp-user] Black/white drawings => black/alpha drawings ?
Stephan Henningsen wrote: > Hi there, > > I have made a drawing and have scanned it. The drawing is > black on white paper (greyscaled, not 1-bit palette). > > But how do I converte all the white to alpha? I've tried > with Select By Colour, but it's not good at all, since alot You need to turn your drawing into an alpha mask. Then apply it to a black (or however you want to color the lines) background. Here is how you do this. 0. Add Alpha Channel if it does not already have one ->Layers->Add Channel 1. Copy the image: Cntl-C 2. Fill your image with the color you want to have for your lines (black typically) 3. Move mouse over Layers Channels & Paths to your selected drawing layer; add Alpha Mask ->Add Layer Mask. Pick "Black (Full Transparency)" 4. In LC&P, The layer should now have two previews; the right one is black and has a white border, indicating that it is selected. 5. Paste the cut you made in step 1. (Cntl-V) 6. Anchor the pasted layer (Cntl-h) 7. You should now see your drawing in the layer's right hand preview. It still has a white border around it, indicated that it is a selected mask (but this may be hard to see if your drawing has a white background 8. Invert ->Image->Colors ->Invert 9. Move mouse over Layers Channels & Paths to your selected drawing layer; Apply Layer Mask That should just about do it. Be good, be well Garry ___ Gimp-user mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user
Re: [Gimp-user] Black/white drawings => black/alpha drawings ?
Stephan, I think you want to use my Filters/Colors/Color To Alpha... in the 1.2.x distribution. First, convert it to RGB. Run the filter, select white as your color, and let it do its magic. Happy GIMPing, Seth Burgess [EMAIL PROTECTED] --- Stephan Henningsen <[EMAIL PROTECTED]> wrote: > Hi there, > > I have made a drawing and have scanned it. The > drawing is > black on white paper (greyscaled, not 1-bit > palette). > > Now, I'd like to colour it, give it a background > etc. But > first I need it to be black lines on an transparrent > background; then I can paint on a different layer > and place > the b/w drawing on top of it. I like doing it this > way, > because it looks very nice. > > But how do I converte all the white to alpha? I've > tried > with Select By Colour, but it's not good at all, > since alot > of grey pixels are not selected. I've tried playing > with > Colour Treshold, Curves and Levels, but haven't > found any > good solution yet. > > Can anyone help me? There must be a button > somewhere that > spreads the palette of a greyscaled image over an > alpha-palette instead. Or can this be done > manually? I'll > try that out right away! > > Suggestions are very welcome! > > > -- > Stephan Henningsen / >/ http://tisprut.dk > > > ___ > Gimp-user mailing list > [EMAIL PROTECTED] > http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user __ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/?.refer=text ___ Gimp-user mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user
[Gimp-user] Black/white drawings => black/alpha drawings ?
Hi there, I have made a drawing and have scanned it. The drawing is black on white paper (greyscaled, not 1-bit palette). Now, I'd like to colour it, give it a background etc. But first I need it to be black lines on an transparrent background; then I can paint on a different layer and place the b/w drawing on top of it. I like doing it this way, because it looks very nice. But how do I converte all the white to alpha? I've tried with Select By Colour, but it's not good at all, since alot of grey pixels are not selected. I've tried playing with Colour Treshold, Curves and Levels, but haven't found any good solution yet. Can anyone help me? There must be a button somewhere that spreads the palette of a greyscaled image over an alpha-palette instead. Or can this be done manually? I'll try that out right away! Suggestions are very welcome! -- Stephan Henningsen / / http://tisprut.dk ___ Gimp-user mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user
