Re: [Gimp-user] GIMP's gradients are not smooth?
On Sat, 2010-01-09 at 13:13 -0500, Anthony DiSante wrote: My monitor is not a CRT, but I think it's pretty good: it's a Samsung 2253BW LCD, from 2008. Not sure if this tells you much, but on this monitor I can easily distinguish every shade in the color scale from dpreview.com: http://nodivisions.com/stuff/ext_posts/dpreview.com-color-scale.jpg But I don't think this is a monitor issue. Here's an image of a gradient that I found on the web: http://nodivisions.com/stuff/ext_posts/smooth-gradient.jpg On my monitor, that looks extremely smooth: I need to blow it up to ~200% before I see the striations, and even then they're nowhere near as rough looking as in the gradient I created in GIMP. Is that because this is a color gradient whereas my GIMP gradient is in gray? Oh, are you trying to create this gradient on an image in gray-scale mode? If you do that, then you are effectively disabling dithering. Dithering works by introducing errors and the full RGB color-space is needed for such dithering to yield the desired result. Sven ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Reading sample point locations from Python-fu
On Sat, 2010-01-09 at 18:19 +0100, Mathias Lindner wrote: is it possible to read the location of sample points from Python? Just as you can e.g. read the anchor points of vectors. No, there is no PDB API to access sample points (yet). If you need one, I suggest that you make an API proposal on the gimp-developer list. Sven ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Tip of the Day is not displayed each time
On Sat, 2010-01-09 at 22:06 +0100, Tetsuya Yuasa wrote: Hallo, I know from the online manual: http://docs.gimp.org/pl/gimp-tips-dialog.html The tip of the day is no longer displayed by default each time you start GIMP. There is no problem so far. But I could not find any information how to use Tip dialog like previous version. I want show the dialog each time I start GIMP. Maybe is it no longer possible to use in that way? No, it isn't. We might add it back for GIMP 2.8, if someone finds the time to do that. Until then you can read the tips by accessing the dialog from the Help menu. If you are interested in getting the tips dialog back, you should consider sending us a patch. Please contact us on the gimp-developer mailing-list if you are interested in such a contribution. Sven ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] Behaviour of gimp-layer-create-mask with channels
Hi. I need some clarification on how the Script-Fu procedure gimp-layer-create-mask acts with channels. Supposing that the current image holds more than one channel, whether I wanted to call such procedure with its second argument mask-type set to ADD-CHANNEL-MASK (6) , how would the Script-Fu interpreter understand which channel to consider? Or rather, with what additional command should I specify the chosen channel? ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] Behaviour of gimp-layer-create-mask with channels
On Sun, 2010-01-10 at 11:51 +0100, Gino D wrote:
I need some clarification on how the Script-Fu procedure
gimp-layer-create-mask acts with channels.
Supposing that the current image holds more than one channel, whether
I wanted to call such procedure with its second argument mask-type
set to ADD-CHANNEL-MASK (6) , how would the Script-Fu interpreter
understand which channel to consider? Or rather, with what additional
command should I specify the chosen channel?
If in doubt, read the source code:
layer_cmds.c (layer_create_mask_invoker):
if (mask_type == GIMP_ADD_CHANNEL_MASK)
{
channel = gimp_image_get_active_channel (image);
The procedure will use the active channel. You can set the active
channel using gimp-image-set-active-channel().
Sven
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Re: [Gimp-user] GIMP's gradients are not smooth?
Hi, On Sat, 2010-01-09 at 13:13 -0500, Anthony DiSante wrote: http://nodivisions.com/stuff/ext_posts/gimp-unsmooth-gradient.jpg http://nodivisions.com/stuff/ext_posts/smooth-gradient.jpg Not a fair comparison. Your unsmooth gradient has a much smaller range than the image of the smooth gradient you are comparing it too. And you ignore the fact that the smooth gradient is not a grayscale gradient. Sven ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] GIMP's gradients are not smooth?
You already get a lot of good advices I will add that just apply a simplicistic but very effective trick may do marvels just some gaussian blur on your gradient may create all the smoothness you may desire ...more the range, more smoothness (you can't save as gradient a blurred gradient but you may well apply gaussian blur after applied the gradient) Hello, I'm trying to create a smooth radial gradient in GIMP. I'm doing what I guess is the obvious thing: use the Blend/Gradient tool, set the shape to Radial, and draw it. This gives me a decent gradient, but it's not actually smooth. And it's especially unsmooth when I set the gradient layer's opacity to ~25%, which is where I want it to be for the effect I'm trying to achieve. Here are my files: http://nodivisions.com/stuff/ext_posts/gimp-unsmooth-gradient.jpg http://nodivisions.com/stuff/ext_posts/gimp-unsmooth-gradient.xcf.gz As you can see, there are obvious striations there, rather than a smooth gradient. What am I doing wrong? I've tried it with and without dithering, adaptive supersampling, etc; none of that seems to improve it. I'm using GIMP 2.6.7 on Ubuntu, if that makes any difference. Thanks, -- photocomix (via www.gimpusers.com) ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
[Gimp-user] SOLVED - copy resynthesizer plugin from 2.6 to 2.7
Ok, I have it working now. I don't understand why there are two storage locations for each of the installations of Gimp on my machine, but by carefully following the paths listed by each under Edit--Preferences--Folders, I was able to figure out what to copy to which folder. . . . not that difficult if you are patient, persistent, and have the time to explore. BTW, the Smart Remove was crashing on my machine. I surfed the web and found (I believe at the Gimp Plug-in Registry site, sorry, my Firefox crashed before I could bookmark the site) Smart-Remove.scm version that fixed my crashing. It installs itself with the menu entry Filters--Enhance--Heal selection as opposed to Smart-remove, although the name of the script has not changed. I'm sure this is old hat for most of you on this forum, but, perhaps by posting, I can help someone just sorting this out for the first time save a little stress and time figuring it out. Caruso -- Carusoswi (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] GIMP's gradients are not smooth?
On the contrary, applying a Gaussian blur will have no effect. The gradient is already as smooth as it will get. Anthony, is it absolutely necessary that you have a whitetransparency gradient layer over a background layer? I was able to eyedrop the center color and outer color and create a one-layer gradient that looks very smooth. I can't articulate why a one-layer gradient looks better than semi-transparent gradient over a background, but it certainly seems to be the case. http://mac9416.keryxproject.org/images/gimp-smooth-gradient.png http://mac9416.keryxproject.org/images/gimp-smooth-gradient.xcf.gz On Sun, Jan 10, 2010 at 8:54 AM, photocomix for...@gimpusers.com wrote: You already get a lot of good advices I will add that just apply a simplicistic but very effective trick may do marvels just some gaussian blur on your gradient may create all the smoothness you may desire ...more the range, more smoothness (you can't save as gradient a blurred gradient but you may well apply gaussian blur after applied the gradient) Hello, I'm trying to create a smooth radial gradient in GIMP. I'm doing what I guess is the obvious thing: use the Blend/Gradient tool, set the shape to Radial, and draw it. This gives me a decent gradient, but it's not actually smooth. And it's especially unsmooth when I set the gradient layer's opacity to ~25%, which is where I want it to be for the effect I'm trying to achieve. Here are my files: http://nodivisions.com/stuff/ext_posts/gimp-unsmooth-gradient.jpg http://nodivisions.com/stuff/ext_posts/gimp-unsmooth-gradient.xcf.gz As you can see, there are obvious striations there, rather than a smooth gradient. What am I doing wrong? I've tried it with and without dithering, adaptive supersampling, etc; none of that seems to improve it. I'm using GIMP 2.6.7 on Ubuntu, if that makes any difference. Thanks, -- photocomix (via www.gimpusers.com) ___ 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] GIMP's gradients are not smooth?
On 01/10/2010 05:22 AM, Sven Neumann wrote: On Sat, 2010-01-09 at 13:13 -0500, Anthony DiSante wrote: My monitor is not a CRT, but I think it's pretty good: it's a Samsung 2253BW LCD, from 2008. Not sure if this tells you much, but on this monitor I can easily distinguish every shade in the color scale from dpreview.com: http://nodivisions.com/stuff/ext_posts/dpreview.com-color-scale.jpg But I don't think this is a monitor issue. Here's an image of a gradient that I found on the web: http://nodivisions.com/stuff/ext_posts/smooth-gradient.jpg On my monitor, that looks extremely smooth: I need to blow it up to ~200% before I see the striations, and even then they're nowhere near as rough looking as in the gradient I created in GIMP. Is that because this is a color gradient whereas my GIMP gradient is in gray? Oh, are you trying to create this gradient on an image in gray-scale mode? No, it's an RGB-mode image; it's just that the only colors I'm using in it are white and gray. On 01/10/2010 06:24 AM, Sven Neumann wrote: On Sat, 2010-01-09 at 13:13 -0500, Anthony DiSante wrote: http://nodivisions.com/stuff/ext_posts/gimp-unsmooth-gradient.jpg http://nodivisions.com/stuff/ext_posts/smooth-gradient.jpg Not a fair comparison. Your unsmooth gradient has a much smaller range than the image of the smooth gradient you are comparing it too. I don't think that's it either. Here's the smooth one again, along with a new one created in GIMP with the same dimensions as the smooth one: http://nodivisions.com/stuff/ext_posts/smooth-gradient.jpg http://nodivisions.com/stuff/ext_posts/gimp-unsmooth-gradient-smaller.jpg That one's better, but still has more visible striations than the non-GIMP image. Or by range are you referring to white-to-gray vs. white-to-blue? Am I running out of intermediate colors faster because white and gray are more similar than white and blue? Ideally what I'd like is a white radial gradient with a transparent background, approx. 800px wide and 25% opaque, which I could then overlay on any colored background in different situations. But I guess the color of the background will affect how smooth the gradient appears. Still, I can't seem to re-create that non-GIMP smooth gradient using GIMP, even on the same color background. Thanks, -- Anthony DiSante http://encodable.com/ http://nodivisions.com/ ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] GIMP's gradients are not smooth?
On Sun, 2010-01-10 at 13:04 -0500, Anthony DiSante wrote: On 01/10/2010 05:22 AM, Sven Neumann wrote: On Sat, 2010-01-09 at 13:13 -0500, Anthony DiSante wrote: My monitor is not a CRT, but I think it's pretty good: it's a Samsung 2253BW LCD, from 2008. Not sure if this tells you much, but on this monitor I can easily distinguish every shade in the color scale from dpreview.com: http://nodivisions.com/stuff/ext_posts/dpreview.com-color-scale.jpg But I don't think this is a monitor issue. Here's an image of a gradient that I found on the web: http://nodivisions.com/stuff/ext_posts/smooth-gradient.jpg On my monitor, that looks extremely smooth: I need to blow it up to ~200% before I see the striations, and even then they're nowhere near as rough looking as in the gradient I created in GIMP. Is that because this is a color gradient whereas my GIMP gradient is in gray? Oh, are you trying to create this gradient on an image in gray-scale mode? No, it's an RGB-mode image; it's just that the only colors I'm using in it are white and gray. On 01/10/2010 06:24 AM, Sven Neumann wrote: On Sat, 2010-01-09 at 13:13 -0500, Anthony DiSante wrote: http://nodivisions.com/stuff/ext_posts/gimp-unsmooth-gradient.jpg http://nodivisions.com/stuff/ext_posts/smooth-gradient.jpg Not a fair comparison. Your unsmooth gradient has a much smaller range than the image of the smooth gradient you are comparing it too. I don't think that's it either. Here's the smooth one again, along with a new one created in GIMP with the same dimensions as the smooth one: http://nodivisions.com/stuff/ext_posts/smooth-gradient.jpg http://nodivisions.com/stuff/ext_posts/gimp-unsmooth-gradient-smaller.jpg That one's better, but still has more visible striations than the non-GIMP image. Or by range are you referring to white-to-gray vs. white-to-blue? Am I running out of intermediate colors faster because white and gray are more similar than white and blue? Range was referring to the range of colors your gradient goes through. Your start and end colors are very close to each other. So there is only a very limited range of colors between them. That is different in the smooth gradient you are comparing to. Its gradient covers a larger color range. I don't think you can substantially better results than what GIMP will create for you. But if you are not happy about the result, feel free to use different software or to patch GIMP to yield a better result. Sven ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] GIMP's gradients are not smooth?
Hi, On Sun, 2010-01-10 at 09:32 -0600, mac9416 wrote: Anthony, is it absolutely necessary that you have a whitetransparency gradient layer over a background layer? I was able to eyedrop the center color and outer color and create a one-layer gradient that looks very smooth. I can't articulate why a one-layer gradient looks better than semi-transparent gradient over a background, but it certainly seems to be the case. http://mac9416.keryxproject.org/images/gimp-smooth-gradient.png http://mac9416.keryxproject.org/images/gimp-smooth-gradient.xcf.gz Oh, if Anthony is blending a gradient over a background, then it's absolutely not surprising that he gets visible banding. At least not until GIMP starts to use higher bit-depths than 8bit per channel. Sven ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
Re: [Gimp-user] GIMP's gradients are not smooth?
Hi, for...@gimpusers.com (2010-01-10 at 1554.49 +0100): You already get a lot of good advices I will add that just apply a simplicistic but very effective trick may do marvels just some gaussian blur on your gradient may create all the smoothness you may desire ...more the range, more smoothness Err, no, in cases like this, when a smooth transition shows bands because the colour change is small but the zone is big, the hack is to use Spread filter, AKA poor man dithering. It requires proper masking, only work with bands that should be smoother but have no real detail, etc, etc, but sometimes it can do the trick to fix problems (in photos or after compositing many layers... if using a gradient, first try dithering option there, as already suggested). GSR ___ Gimp-user mailing list Gimp-user@lists.XCF.Berkeley.EDU https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-user
