Solarize in Gimp - Graphics

This is a discussion on Solarize in Gimp - Graphics ; Hi all Can someone tell me how to do the solarize effect in this tutorial. <http://webdeveloper.com/design/design_oil_effect.html> I thought I had a tutorial on solarize for gimp but I cannot find it now, so am not sure if it is only ...

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Solarize in Gimp

  1. Default Solarize in Gimp

    Hi all

    Can someone tell me how to do the solarize effect in this tutorial.

    <http://webdeveloper.com/design/design_oil_effect.html>

    I thought I had a tutorial on solarize for gimp but I cannot find it now,
    so am not sure if it is only in my imagination :-).

    I have gimp 2.2.9 and 2.3.5 on Fedora Core 4.

    Thank you.

    --
    Lin
    Remove the obvious for email replies.
    Our insult page awaits your contribution
    http://kwakakid.cjb.net/insult.html


  2. Default Re: Solarize in Gimp

    Lin wrote:
    > Hi all
    >
    > Can someone tell me how to do the solarize effect in this tutorial.
    >
    > <http://webdeveloper.com/design/design_oil_effect.html>


    Try filters->distorts->wind for a similar effect. Unfortunately you'll
    have to turn the image first 90
    >
    > I thought I had a tutorial on solarize for gimp but I cannot find it now,
    > so am not sure if it is only in my imagination :-).
    >
    > I have gimp 2.2.9 and 2.3.5 on Fedora Core 4.
    >
    > Thank you.
    >


  3. Default Re: Solarize in Gimp

    Lin wrote:
    > Can someone tell me how to do the solarize effect in this tutorial.


    Well, I looked everywhere but I couldn't find any information on how to
    do solarization in GIMP itself.
    However, I *am* going to propose you a solution (even though it's not a
    very elegant one).

    The command-line tool "mogrify" has a solarization filter. "mogrify" is
    part of the GNU GPL-licensed ImageMagick suite.
    (http://www.imagemagick.org/)

    -=-

    From the man page ImageMagick (1):

    -solarize <factor>
    negate all pixels above the threshold level

    Specify factor as the percent threshold of the intensity (0 - 99.9%).

    This option produces a solarization effect seen when exposing a
    photographic film to light during the development process.

    -=-

    So I guess you could save the layer you want to apply the solarize
    effect, open a terminal, invoke something like "mogrify -solarize 50"
    and re-import the result into your image in GIMP. (I haven't tested it
    myself, but it should work with no further problems).

    Again, it is not an elegant solution at all and if anybody knows a
    better, more elegant, GIMP-based solution, please let us know.

    Hope it helps!

    --
    Frederico Mameri

    fmameri at free dot fr
    http://fmameri.free.fr

    Linux Registered User #333496
    Resist Tyranny: Firefox & Thunderbird

  4. Default Re: Solarize in Gimp

    On Mon, 14 Nov 2005 21:11:26 -0200, Frederico Mameri tapped the keys and
    came up with:

    > Lin wrote:
    >> Can someone tell me how to do the solarize effect in this tutorial.

    >
    > Well, I looked everywhere but I couldn't find any information on how to
    > do solarization in GIMP itself.
    > However, I *am* going to propose you a solution (even though it's not a
    > very elegant one).
    >
    > From the man page ImageMagick (1):
    >
    > -solarize <factor>
    > negate all pixels above the threshold level
    >
    > Specify factor as the percent threshold of the intensity (0 - 99.9%).
    >
    > This option produces a solarization effect seen when exposing a
    > photographic film to light during the development process.
    >
    > So I guess you could save the layer you want to apply the solarize
    > effect, open a terminal, invoke something like "mogrify -solarize 50"
    > and re-import the result into your image in GIMP. (I haven't tested it
    > myself, but it should work with no further problems).
    >
    > Again, it is not an elegant solution at all and if anybody knows a
    > better, more elegant, GIMP-based solution, please let us know.
    >
    > Hope it helps!


    Thank you for that I had a play around, but could not get it to work
    properly, might be just me though.

    --
    Lin
    Remove the obvious for email replies.
    Our insult page awaits your contribution
    http://kwakakid.cjb.net/insult.html


  5. Default Re: Solarize in Gimp

    Lin wrote:
    >>So I guess you could save the layer you want to apply the solarize
    >>effect, open a terminal, invoke something like "mogrify -solarize 50"
    >>and re-import the result into your image in GIMP. (I haven't tested it
    >>myself, but it should work with no further problems).

    >
    > Thank you for that I had a play around, but could not get it to work
    > properly, might be just me though.


    Lin,

    Well, excuse me. It seems it was my fault after all. In fact, you should
    invoke mogrify like this:
    "mogrify -solarize 50% <your-image>"

    In fact, man page says it shoud be a number between 0 and 99.9% (note
    the % sign).

    After I mogrified the image file I had previously exported from a layer,
    I re-opened it as a new one. That way, I pretty much suceeded in
    creating an image file pretty much the same as the 4th one in the web
    site you indicated.

    However, I *am* having trouble with the black body part (from the 4th to
    the 5th image). (For a bit of theory on black body, see
    http://en.wikipedia.org/wiki/Blackbody). The closest to it I got was by
    using the Reds palette. But not quite there.

    Maybe some of the guys out there could help us figure out how to achieve
    this effect using the GIMP.

    --
    Frederico Mameri

    fmameri at free dot fr
    http://fmameri.free.fr

    Linux Registered User #333496
    Resist Tyranny: Firefox & Thunderbird

  6. Default Re: Solarize in Gimp

    On Thu, 17 Nov 2005 12:58:49 -0200, Frederico Mameri tapped the keys and
    came up with:

    > Lin wrote:


    >> Thank you for that I had a play around, but could not get it to work
    >> properly, might be just me though.

    >
    > Lin,
    >
    > Well, excuse me. It seems it was my fault after all. In fact, you should
    > invoke mogrify like this:
    > "mogrify -solarize 50% <your-image>"


    Heh. Ok, I won't mention that I read the man page and even though
    I saw the 0-99.9%, never twigged that I needed that % sign. (I call it
    my senior moment :-).) Worked really well after that. But like you the
    BlackBody palette is the next step. Will have a look at the link you
    provided.

    Thank you very much for your help.

    > In fact, man page says it shoud be a number between 0 and 99.9% (note
    > the % sign).
    >
    > After I mogrified the image file I had previously exported from a layer,
    > I re-opened it as a new one. That way, I pretty much suceeded in
    > creating an image file pretty much the same as the 4th one in the web
    > site you indicated.
    >
    > However, I *am* having trouble with the black body part (from the 4th to
    > the 5th image). (For a bit of theory on black body, see
    > http://en.wikipedia.org/wiki/Blackbody). The closest to it I got was by
    > using the Reds palette. But not quite there.


    Although it is not perfect, I changed mode to RGB and then used
    colorise using hue, saturation and lightness to get a good result, which
    is a workaround.

    > Maybe some of the guys out there could help us figure out how to achieve
    > this effect using the GIMP.


    --
    Lin
    Remove the obvious for email replies.
    Our insult page awaits your contribution
    http://kwakakid.cjb.net/insult.html


  7. Default Re: Solarize in Gimp

    Lin wrote:
    > Although it is not perfect, I changed mode to RGB and then used
    > colorise using hue, saturation and lightness to get a good result, which
    > is a workaround.


    Yep, kinda worked. Thanks. I'll keep on looking and if you find out
    something, please let us know.

    --
    Frederico Mameri

    fmameri at free dot fr
    http://fmameri.free.fr

    Linux Registered User #333496
    Resist Tyranny: Firefox & Thunderbird

  8. Default Re: Solarize in Gimp

    Frederico Mameri wrote:

    > Lin wrote:
    >> Although it is not perfect, I changed mode to RGB and then used
    >> colorise using hue, saturation and lightness to get a good result, which
    >> is a workaround.

    >
    > Yep, kinda worked. Thanks. I'll keep on looking and if you find out
    > something, please let us know.
    >

    Hello,
    no blind tries, remember chemical fim: the so called pseudo solarisation
    means, that the mid range of the tonal values tilt. Do the same with the
    Gimp 2.2 "Layers - Color - Curves" (got a german version but the path
    should be like this). Drag the curve on the left and right side to the half
    of the window like this:
    ------------
    | |
    ------------
    | |
    -------------

    Then pull the curve down in the middle like this:
    ---------
    | |
    \ /
    \ /
    -----------

    And voila you got a perfect simulation of a pseudo solarisation

    Cheers
    --
    Dirk Hartmann
    blangis_nospam@gmx.de
    Remove _nospam from my mail adress because of spam protection

  9. Default Re: Solarize in Gimp

    Dirk Hartmann wrote:
    > Hello,
    > no blind tries, remember chemical fim: the so called pseudo solarisation
    > means, that the mid range of the tonal values tilt. Do the same with the
    > Gimp 2.2 "Layers - Color - Curves" (got a german version but the path
    > should be like this). Drag the curve on the left and right side to the half
    > of the window like this:
    > ------------
    > | |
    > ------------
    > | |
    > -------------
    >
    > Then pull the curve down in the middle like this:
    > ---------
    > | |
    > \ /
    > \ /
    > -----------
    >
    > And voila you got a perfect simulation of a pseudo solarisation


    Well, yeah.. it kinda works (the results are not exactly the same,
    though). How about that blackbody effect? Any clues??

    Thanks,

    --
    Frederico Mameri

    fmameri at free dot fr
    http://fmameri.free.fr

    Linux Registered User #333496
    Resist Tyranny: Firefox & Thunderbird

  10. Default Re: Solarize in Gimp

    Frederico Mameri wrote:

    > Dirk Hartmann wrote:
    >> Hello,
    >> no blind tries, remember chemical fim: the so called pseudo solarisation
    >> means, that the mid range of the tonal values tilt. Do the same with the
    >> Gimp 2.2 "Layers - Color - Curves" (got a german version but the path
    >> should be like this). Drag the curve on the left and right side to the
    >> half of the window like this:
    >> ------------
    >> | |
    >> ------------
    >> | |
    >> -------------
    >>
    >> Then pull the curve down in the middle like this:
    >> ---------
    >> | |
    >> \ /
    >> \ /
    >> -----------
    >>
    >> And voila you got a perfect simulation of a pseudo solarisation

    >
    > Well, yeah.. it kinda works (the results are not exactly the same,
    > though). How about that blackbody effect? Any clues??
    >
    > Thanks,
    >

    Not sure what you mean. Regarding to my poor english you try to heat a
    theoretically platin sphere and what comes out of this "black body" has a
    certain color temperature (this is the model of a "black body" and
    indicates the degree measured in Kelvin of a certain color temperature in
    morning, noon or tungsten light). So the picure is afterwards more redish
    or blueish. Is this what you wanna do?
    --
    Dirk Hartmann
    Remove _nospam from my mail adress because of spam protection

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