Re: [Gimp-user] Best way to semi-flatten a transparent gif against a background image
Hi Justyn, On Wed, Sep 24, 2008 at 8:43 AM, Justyn Butler <[EMAIL PROTECTED]> wrote: > Hi, > > I've been searching for the answer to this but I'm stumped. Maybe it's > so obvious that there's no need for it to be covered in the docs, or > perhaps I just don't know the correct terminology to search for. > > If I have a png (like a button or logo) with anti-aliasing around the > edge and an alpha channel and I need to convert it to a gif, I can use > the semi-flatten option under Layer->Transparency. > This will remove any semi-transparency while conserving anti-aliasing > and the full-transparency of the image. > To use this filter you have to know what color background will be > behind the image when it is placed on the page. > > With the semi-flatten tool you can only provide a solid color that the > image will be placed over. > Normally this works fine, but I have a situation where the background > behind the gif fades from light to dark and consequently > semi-flattening against a solid color is not sufficient. > > So what I want to do is semi-flatten against my known background image > (a gradient, rather than a solid color) whilst preserving the > fully-transparent parts of the gif. > > I am very inexperienced with image software but I'm sure there must be > a better way than I am doing right now, which is: > > 1) png with alpha channel in top layer > 2) known background image in bottom layer > 3) select non-fully-transparent part of image with Select By Color > Tool (select alpha pixel then invert selection) > 4) Flatten image > 5) Copy selection > 6) Paste As New > > (Alpha to selection doesn't do the trick for step 3 because it > discounts some semi-transparent pixels as well as transparent ones.) I recommend: 1) Layer->Transparency->Threshold Alpha (to 1) 2) Alpha to selection 3) Copy Visible 4) Paste as New David -- Everything has reasons. Nothing has justification. Ĉio havas kialojn; Neniaĵo havas pravigeron. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] Best way to semi-flatten a transparent gif against a background image
Hi, I've been searching for the answer to this but I'm stumped. Maybe it's so obvious that there's no need for it to be covered in the docs, or perhaps I just don't know the correct terminology to search for. If I have a png (like a button or logo) with anti-aliasing around the edge and an alpha channel and I need to convert it to a gif, I can use the semi-flatten option under Layer->Transparency. This will remove any semi-transparency while conserving anti-aliasing and the full-transparency of the image. To use this filter you have to know what color background will be behind the image when it is placed on the page. With the semi-flatten tool you can only provide a solid color that the image will be placed over. Normally this works fine, but I have a situation where the background behind the gif fades from light to dark and consequently semi-flattening against a solid color is not sufficient. So what I want to do is semi-flatten against my known background image (a gradient, rather than a solid color) whilst preserving the fully-transparent parts of the gif. I am very inexperienced with image software but I'm sure there must be a better way than I am doing right now, which is: 1) png with alpha channel in top layer 2) known background image in bottom layer 3) select non-fully-transparent part of image with Select By Color Tool (select alpha pixel then invert selection) 4) Flatten image 5) Copy selection 6) Paste As New (Alpha to selection doesn't do the trick for step 3 because it discounts some semi-transparent pixels as well as transparent ones.) It doesn't feel quite right - could someone with some more experience point out any unnecessary steps I'm taking or point out a better way altogether to do it please, if there is one? Thank you, Justyn. ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] printing only blue
2008/9/23 Don Koch <[EMAIL PROTECTED]>: > Cheaper printers are RBY, not CMYK. He never said he had an RGB > printer. (I don't think anyone even makes an RGB printer.) My HP printer, > for example, had a Red-Blue-Yellow cartridge and a black one. I do have > another printer that is CMYK. > I should have been clear about that, sorry. The printer cartridge has red, blue, and yellow reserviors, in fact, it is an HP model. > Best suggestion so far is to use the printer's clean mode. Otherwise, > I don't see a big problem with a little bit of red leaking through. > I have used the printer's clean mode but it is wasting much ink from the other reserviors, and wasting the black as well. I figure that I need at least another ten or so passes, maybe more, so I'd like to save the other colours. -- Dotan Cohen http://what-is-what.com http://gibberish.co.il א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת ä-ö-ü-ß-Ä-Ö-Ü ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] printing only blue
2008/9/23 Kevin Cozens <[EMAIL PROTECTED]>: > Dotan Cohen wrote: >> My printer has a stuck blue nozzle and I am trying to clean it. > > The simplest solution is to run multiple cleaning cycles to clear the nozzles. > I had an inkjet printer where multiple nozzles were clogged. It took about > three or four of the printers built-in cleaning cycles to fully unclog all > holes in all of the cartridges. > I've run tens of passes. Everything is clean but the blue reservoir, which is stuck real bad. I'm cleaning it with spit, printing, spit, printing, but I have a long ways to go and I'd like to not waste the ink from the other reservoirs. That's why I'd like to print only blue. -- Dotan Cohen http://what-is-what.com http://gibberish.co.il א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת ä-ö-ü-ß-Ä-Ö-Ü ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] printing only blue
On Tue, 23 Sep 2008 11:26:28 -0400 John Culleton wrote: > On Tuesday 23 September 2008 05:20:47 am Torsten Neuer wrote: > > Hello, > > > > Am Dienstag, 23. September 2008 10:36:18 schrieb Dotan Cohen: > > > My printer has a stuck blue nozzle and I am trying to clean it. > > > Of the blue, yellow, red, and black cartridges, I want to only > > > print from the blue. I tried to configure a blue-255 colour and > > > the rest 0, however the printed image still uses a bit from the > > > red cartridge as the choice of colours differ from those in Gimp. > > > What colour could I configure, that would translate to blue only > > > from the printer? > > > > Printers are normally CMYK, not RGB. That is why ff will also > > utilize the other cartridges of the printer, not only cyan. > > You will therefore have to select 100% C from CMYK colourspace in > > order to only print from the C cartridge - which is a bit awkward > > in Gimp, since the program has no direct CMYK support. > > Nevertheless, you can do so with the colour selector (get to the > > printer colour selection mode for CMYK colours). The colour will be > > translated to RGB 00... > > > > HTH > > > > Torsten > > ImageMagick will convert from rgb to cmyk after saving the file from > Gimp. If the above RGB 00 is used then it should convert to Cyan > (not exactly blue.) Cheaper printers are RBY, not CMYK. He never said he had an RGB printer. (I don't think anyone even makes an RGB printer.) My HP printer, for example, had a Red-Blue-Yellow cartridge and a black one. I do have another printer that is CMYK. Best suggestion so far is to use the printer's clean mode. Otherwise, I don't see a big problem with a little bit of red leaking through. -d ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] printing only blue
On Tuesday 23 September 2008 05:20:47 am Torsten Neuer wrote: > Hello, > > Am Dienstag, 23. September 2008 10:36:18 schrieb Dotan Cohen: > > My printer has a stuck blue nozzle and I am trying to clean it. > > Of the blue, yellow, red, and black cartridges, I want to only > > print from the blue. I tried to configure a blue-255 colour and > > the rest 0, however the printed image still uses a bit from the > > red cartridge as the choice of colours differ from those in Gimp. > > What colour could I configure, that would translate to blue only > > from the printer? > > Printers are normally CMYK, not RGB. That is why ff will also > utilize the other cartridges of the printer, not only cyan. > You will therefore have to select 100% C from CMYK colourspace in > order to only print from the C cartridge - which is a bit awkward > in Gimp, since the program has no direct CMYK support. > Nevertheless, you can do so with the colour selector (get to the > printer colour selection mode for CMYK colours). The colour will be > translated to RGB 00... > > HTH > > Torsten ImageMagick will convert from rgb to cmyk after saving the file from Gimp. If the above RGB 00 is used then it should convert to Cyan (not exactly blue.) -- John Culleton Resources for every author and publisher: http://wexfordpress.com/tex/shortlist.pdf http://wexfordpress.com/tex/packagers.pdf http://www.creativemindspress.com/newbiefaq.htm http://www.gropenassoc.com/TopLevelPages/reference%20desk.htm ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] printing only blue
Dotan Cohen wrote: > My printer has a stuck blue nozzle and I am trying to clean it. The simplest solution is to run multiple cleaning cycles to clear the nozzles. I had an inkjet printer where multiple nozzles were clogged. It took about three or four of the printers built-in cleaning cycles to fully unclog all holes in all of the cartridges. -- Cheers! Kevin. http://www.ve3syb.ca/ |"What are we going to do today, Borg?" Owner of Elecraft K2 #2172 |"Same thing we always do, Pinkutus: | Try to assimilate the world!" #include | -Pinkutus & the Borg ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] printing only blue
Hello, Am Dienstag, 23. September 2008 10:36:18 schrieb Dotan Cohen: > My printer has a stuck blue nozzle and I am trying to clean it. Of the > blue, yellow, red, and black cartridges, I want to only print from the > blue. I tried to configure a blue-255 colour and the rest 0, however > the printed image still uses a bit from the red cartridge as the > choice of colours differ from those in Gimp. What colour could I > configure, that would translate to blue only from the printer? Printers are normally CMYK, not RGB. That is why ff will also utilize the other cartridges of the printer, not only cyan. You will therefore have to select 100% C from CMYK colourspace in order to only print from the C cartridge - which is a bit awkward in Gimp, since the program has no direct CMYK support. Nevertheless, you can do so with the colour selector (get to the printer colour selection mode for CMYK colours). The colour will be translated to RGB 00... HTH Torsten 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] printing only blue
My printer has a stuck blue nozzle and I am trying to clean it. Of the blue, yellow, red, and black cartridges, I want to only print from the blue. I tried to configure a blue-255 colour and the rest 0, however the printed image still uses a bit from the red cartridge as the choice of colours differ from those in Gimp. What colour could I configure, that would translate to blue only from the printer? Thanks in advance. -- Dotan Cohen http://what-is-what.com http://gibberish.co.il א-ב-ג-ד-ה-ו-ז-ח-ט-י-ך-כ-ל-ם-מ-ן-נ-ס-ע-ף-פ-ץ-צ-ק-ר-ש-ת ä-ö-ü-ß-Ä-Ö-Ü ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
