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Sasquatch
 Post subject: Psycho Delik
PostPosted: Wed Sep 07, 2016 4:51 pm  (#1) 
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GimpChat Member

Joined: Jul 17, 2016
Posts: 293
Location: Arlington, TX
I was experimenting with curves today and happened upon a fun effect I thought I'd share.

Here's the royalty-free parrot before;
Image

And here's the parrot after a 5px Gaussian Blur to help the colors blend and then the new curve applied;
Image

If you'd like to play with the curve, just copy the code in the spoiler below, paste it into a .txt file, then import the file into GIMP via the Curves dialog.
SHOW SPOILER
Code: Select all
# GIMP curves tool settings
(GimpCurvesConfig "Psycho Delik"
(time 0)
(channel value)
(curve
    (curve-type smooth)
    (n-points 17)
    (points 34 0.000000 0.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 1.000000 1.000000)
    (n-samples 256)
    (samples 256 0.000000 0.003922 0.007843 0.011765 0.015686 0.019608 0.023529 0.027451 0.031373 0.035294 0.039216 0.043137 0.047059 0.050980 0.054902 0.058824 0.062745 0.066667 0.070588 0.074510 0.078431 0.082353 0.086275 0.090196 0.094118 0.098039 0.101961 0.105882 0.109804 0.113725 0.117647 0.121569 0.125490 0.129412 0.133333 0.137255 0.141176 0.145098 0.149020 0.152941 0.156863 0.160784 0.164706 0.168627 0.172549 0.176471 0.180392 0.184314 0.188235 0.192157 0.196078 0.200000 0.203922 0.207843 0.211765 0.215686 0.219608 0.223529 0.227451 0.231373 0.235294 0.239216 0.243137 0.247059 0.250980 0.254902 0.258824 0.262745 0.266667 0.270588 0.274510 0.278431 0.282353 0.286275 0.290196 0.294118 0.298039 0.301961 0.305882 0.309804 0.313725 0.317647 0.321569 0.325490 0.329412 0.333333 0.337255 0.341176 0.345098 0.349020 0.352941 0.356863 0.360784 0.364706 0.368627 0.372549 0.376471 0.380392 0.384314 0.388235 0.392157 0.396078 0.400000 0.403922 0.407843 0.411765 0.415686 0.419608 0.423529 0.427451 0.431373 0.435294 0.439216 0.443137 0.447059 0.450980 0.454902 0.458824 0.462745 0.466667 0.470588 0.474510 0.478431 0.482353 0.486275 0.490196 0.494118 0.498039 0.501961 0.505882 0.509804 0.513725 0.517647 0.521569 0.525490 0.529412 0.533333 0.537255 0.541176 0.545098 0.549020 0.552941 0.556863 0.560784 0.564706 0.568627 0.572549 0.576471 0.580392 0.584314 0.588235 0.592157 0.596078 0.600000 0.603922 0.607843 0.611765 0.615686 0.619608 0.623529 0.627451 0.631373 0.635294 0.639216 0.643137 0.647059 0.650980 0.654902 0.658824 0.662745 0.666667 0.670588 0.674510 0.678431 0.682353 0.686275 0.690196 0.694118 0.698039 0.701961 0.705882 0.709804 0.713725 0.717647 0.721569 0.725490 0.729412 0.733333 0.737255 0.741176 0.745098 0.749020 0.752941 0.756863 0.760784 0.764706 0.768627 0.772549 0.776471 0.780392 0.784314 0.788235 0.792157 0.796078 0.800000 0.803922 0.807843 0.811765 0.815686 0.819608 0.823529 0.827451 0.831373 0.835294 0.839216 0.843137 0.847059 0.850980 0.854902 0.858824 0.862745 0.866667 0.870588 0.874510 0.878431 0.882353 0.886275 0.890196 0.894118 0.898039 0.901961 0.905882 0.909804 0.913725 0.917647 0.921569 0.925490 0.929412 0.933333 0.937255 0.941176 0.945098 0.949020 0.952941 0.956863 0.960784 0.964706 0.968627 0.972549 0.976471 0.980392 0.984314 0.988235 0.992157 0.996078 1.000000))
(channel red)
(curve
    (curve-type smooth)
    (n-points 17)
    (points 34 0.000000 0.000000 -1.000000 -1.000000 0.124247 1.000000 -1.000000 -1.000000 0.248494 0.247485 -1.000000 -1.000000 0.372741 1.000000 0.498494 0.503018 -1.000000 -1.000000 -1.000000 -1.000000 0.625753 1.000000 -1.000000 -1.000000 0.750753 0.754527 -1.000000 -1.000000 0.876506 1.000000 -1.000000 -1.000000 1.000000 1.000000)
    (n-samples 256)
    (samples 256 0.000000 0.045377 0.090672 0.135802 0.180683 0.225234 0.269372 0.313013 0.356076 0.398478 0.440136 0.480967 0.520890 0.559820 0.597676 0.634374 0.669833 0.703969 0.736700 0.767943 0.797616 0.825636 0.851920 0.876385 0.898949 0.919530 0.938044 0.954409 0.968543 0.980362 0.989784 0.996726 1.000000 1.000000 0.998239 0.990640 0.978972 0.963542 0.944657 0.922625 0.897753 0.870348 0.840718 0.809169 0.776010 0.741546 0.706086 0.669938 0.633407 0.596802 0.560429 0.524597 0.489611 0.455781 0.423412 0.392812 0.364289 0.338149 0.314700 0.294249 0.277104 0.263572 0.253960 0.247485 0.249564 0.255628 0.265417 0.278671 0.295130 0.314534 0.336623 0.361138 0.387817 0.416402 0.446631 0.478246 0.510986 0.544591 0.578802 0.613358 0.647999 0.682465 0.716497 0.749834 0.782217 0.813385 0.843078 0.871037 0.897002 0.920712 0.941907 0.960328 0.975715 0.987807 0.996345 1.000000 1.000000 1.000000 0.997645 0.991013 0.981799 0.970206 0.956439 0.940701 0.923198 0.904133 0.883711 0.862136 0.839612 0.816343 0.792534 0.768389 0.744112 0.719907 0.695979 0.672532 0.649770 0.627898 0.607119 0.587638 0.569659 0.553387 0.539025 0.526778 0.516851 0.509446 0.504770 0.503018 0.504288 0.507996 0.513991 0.522119 0.532229 0.544169 0.557786 0.572928 0.589442 0.607177 0.625980 0.645700 0.666183 0.687277 0.708831 0.730692 0.752708 0.774726 0.796595 0.818161 0.839274 0.859780 0.879528 0.898365 0.916138 0.932697 0.947888 0.961559 0.973558 0.983732 0.991930 0.998000 1.000000 1.000000 1.000000 1.000000 1.000000 0.997672 0.992640 0.986352 0.978922 0.970465 0.961093 0.950922 0.940064 0.928635 0.916749 0.904519 0.892059 0.879483 0.866907 0.854442 0.842205 0.830308 0.818865 0.807992 0.797801 0.788407 0.779924 0.772466 0.766147 0.761080 0.757381 0.754527 0.755112 0.756821 0.759588 0.763346 0.768028 0.773568 0.779899 0.786953 0.794664 0.802966 0.811791 0.821073 0.830744 0.840739 0.850990 0.861430 0.871993 0.882612 0.893220 0.903751 0.914136 0.924311 0.934207 0.943759 0.952899 0.961560 0.969676 0.977180 0.984005 0.990084 0.995351 0.999739 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000))
(channel green)
(curve
    (curve-type smooth)
    (n-points 17)
    (points 34 0.000000 0.000000 -1.000000 -1.000000 0.125000 1.000000 -1.000000 -1.000000 0.249247 0.247485 -1.000000 -1.000000 0.371235 1.000000 -1.000000 -1.000000 0.497741 0.501006 -1.000000 -1.000000 0.625000 1.000000 -1.000000 -1.000000 0.753765 0.754527 -1.000000 -1.000000 0.873494 1.000000 -1.000000 -1.000000 1.000000 1.000000)
    (n-samples 256)
    (samples 256 0.000000 0.045377 0.090672 0.135802 0.180683 0.225234 0.269372 0.313013 0.356076 0.398478 0.440136 0.480967 0.520890 0.559820 0.597676 0.634374 0.669833 0.703969 0.736700 0.767943 0.797616 0.825636 0.851920 0.876385 0.898949 0.919530 0.938044 0.954409 0.968543 0.980362 0.989784 0.996726 1.000000 1.000000 0.998239 0.990640 0.978972 0.963542 0.944657 0.922625 0.897753 0.870348 0.840718 0.809169 0.776010 0.741546 0.706086 0.669938 0.633407 0.596802 0.560429 0.524597 0.489611 0.455781 0.423412 0.392812 0.364289 0.338149 0.314700 0.294249 0.277104 0.263572 0.253960 0.247485 0.249564 0.255628 0.265417 0.278671 0.295130 0.314534 0.336623 0.361138 0.387817 0.416402 0.446631 0.478246 0.510986 0.544591 0.578802 0.613358 0.647999 0.682465 0.716497 0.749834 0.782217 0.813385 0.843078 0.871037 0.897002 0.920712 0.941907 0.960328 0.975715 0.987807 0.996345 1.000000 1.000000 1.000000 0.997645 0.991013 0.981799 0.970206 0.956439 0.940701 0.923198 0.904133 0.883711 0.862136 0.839612 0.816343 0.792534 0.768389 0.744112 0.719907 0.695979 0.672532 0.649770 0.627898 0.607119 0.587638 0.569659 0.553387 0.539025 0.526778 0.516851 0.509446 0.504770 0.503018 0.504288 0.507996 0.513991 0.522119 0.532229 0.544169 0.557786 0.572928 0.589442 0.607177 0.625980 0.645700 0.666183 0.687277 0.708831 0.730692 0.752708 0.774726 0.796595 0.818161 0.839274 0.859780 0.879528 0.898365 0.916138 0.932697 0.947888 0.961559 0.973558 0.983732 0.991930 0.998000 1.000000 1.000000 1.000000 1.000000 1.000000 0.997672 0.992640 0.986352 0.978922 0.970465 0.961093 0.950922 0.940064 0.928635 0.916749 0.904519 0.892059 0.879483 0.866907 0.854442 0.842205 0.830308 0.818865 0.807992 0.797801 0.788407 0.779924 0.772466 0.766147 0.761080 0.757381 0.754527 0.755112 0.756821 0.759588 0.763346 0.768028 0.773568 0.779899 0.786953 0.794664 0.802966 0.811791 0.821073 0.830744 0.840739 0.850990 0.861430 0.871993 0.882612 0.893220 0.903751 0.914136 0.924311 0.934207 0.943759 0.952899 0.961560 0.969676 0.977180 0.984005 0.990084 0.995351 0.999739 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000))
(channel blue)
(curve
    (curve-type smooth)
    (n-points 17)
    (points 34 0.000000 0.000000 -1.000000 -1.000000 0.123494 1.000000 -1.000000 -1.000000 0.250000 0.253521 -1.000000 -1.000000 0.371988 1.000000 -1.000000 -1.000000 0.497741 0.503018 -1.000000 -1.000000 0.625753 1.000000 -1.000000 -1.000000 0.750753 0.754527 -1.000000 -1.000000 0.875000 1.000000 -1.000000 -1.000000 1.000000 1.000000)
    (n-samples 256)
    (samples 256 0.000000 0.045377 0.090672 0.135802 0.180683 0.225234 0.269372 0.313013 0.356076 0.398478 0.440136 0.480967 0.520890 0.559820 0.597676 0.634374 0.669833 0.703969 0.736700 0.767943 0.797616 0.825636 0.851920 0.876385 0.898949 0.919530 0.938044 0.954409 0.968543 0.980362 0.989784 0.996726 1.000000 1.000000 0.998239 0.990640 0.978972 0.963542 0.944657 0.922625 0.897753 0.870348 0.840718 0.809169 0.776010 0.741546 0.706086 0.669938 0.633407 0.596802 0.560429 0.524597 0.489611 0.455781 0.423412 0.392812 0.364289 0.338149 0.314700 0.294249 0.277104 0.263572 0.253960 0.247485 0.249564 0.255628 0.265417 0.278671 0.295130 0.314534 0.336623 0.361138 0.387817 0.416402 0.446631 0.478246 0.510986 0.544591 0.578802 0.613358 0.647999 0.682465 0.716497 0.749834 0.782217 0.813385 0.843078 0.871037 0.897002 0.920712 0.941907 0.960328 0.975715 0.987807 0.996345 1.000000 1.000000 1.000000 0.997645 0.991013 0.981799 0.970206 0.956439 0.940701 0.923198 0.904133 0.883711 0.862136 0.839612 0.816343 0.792534 0.768389 0.744112 0.719907 0.695979 0.672532 0.649770 0.627898 0.607119 0.587638 0.569659 0.553387 0.539025 0.526778 0.516851 0.509446 0.504770 0.503018 0.504288 0.507996 0.513991 0.522119 0.532229 0.544169 0.557786 0.572928 0.589442 0.607177 0.625980 0.645700 0.666183 0.687277 0.708831 0.730692 0.752708 0.774726 0.796595 0.818161 0.839274 0.859780 0.879528 0.898365 0.916138 0.932697 0.947888 0.961559 0.973558 0.983732 0.991930 0.998000 1.000000 1.000000 1.000000 1.000000 1.000000 0.997672 0.992640 0.986352 0.978922 0.970465 0.961093 0.950922 0.940064 0.928635 0.916749 0.904519 0.892059 0.879483 0.866907 0.854442 0.842205 0.830308 0.818865 0.807992 0.797801 0.788407 0.779924 0.772466 0.766147 0.761080 0.757381 0.754527 0.755112 0.756821 0.759588 0.763346 0.768028 0.773568 0.779899 0.786953 0.794664 0.802966 0.811791 0.821073 0.830744 0.840739 0.850990 0.861430 0.871993 0.882612 0.893220 0.903751 0.914136 0.924311 0.934207 0.943759 0.952899 0.961560 0.969676 0.977180 0.984005 0.990084 0.995351 0.999739 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000 1.000000))
(channel alpha)
(curve
    (curve-type smooth)
    (n-points 17)
    (points 34 0.000000 0.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 -1.000000 1.000000 1.000000)
    (n-samples 256)
    (samples 256 0.000000 0.003922 0.007843 0.011765 0.015686 0.019608 0.023529 0.027451 0.031373 0.035294 0.039216 0.043137 0.047059 0.050980 0.054902 0.058824 0.062745 0.066667 0.070588 0.074510 0.078431 0.082353 0.086275 0.090196 0.094118 0.098039 0.101961 0.105882 0.109804 0.113725 0.117647 0.121569 0.125490 0.129412 0.133333 0.137255 0.141176 0.145098 0.149020 0.152941 0.156863 0.160784 0.164706 0.168627 0.172549 0.176471 0.180392 0.184314 0.188235 0.192157 0.196078 0.200000 0.203922 0.207843 0.211765 0.215686 0.219608 0.223529 0.227451 0.231373 0.235294 0.239216 0.243137 0.247059 0.250980 0.254902 0.258824 0.262745 0.266667 0.270588 0.274510 0.278431 0.282353 0.286275 0.290196 0.294118 0.298039 0.301961 0.305882 0.309804 0.313725 0.317647 0.321569 0.325490 0.329412 0.333333 0.337255 0.341176 0.345098 0.349020 0.352941 0.356863 0.360784 0.364706 0.368627 0.372549 0.376471 0.380392 0.384314 0.388235 0.392157 0.396078 0.400000 0.403922 0.407843 0.411765 0.415686 0.419608 0.423529 0.427451 0.431373 0.435294 0.439216 0.443137 0.447059 0.450980 0.454902 0.458824 0.462745 0.466667 0.470588 0.474510 0.478431 0.482353 0.486275 0.490196 0.494118 0.498039 0.501961 0.505882 0.509804 0.513725 0.517647 0.521569 0.525490 0.529412 0.533333 0.537255 0.541176 0.545098 0.549020 0.552941 0.556863 0.560784 0.564706 0.568627 0.572549 0.576471 0.580392 0.584314 0.588235 0.592157 0.596078 0.600000 0.603922 0.607843 0.611765 0.615686 0.619608 0.623529 0.627451 0.631373 0.635294 0.639216 0.643137 0.647059 0.650980 0.654902 0.658824 0.662745 0.666667 0.670588 0.674510 0.678431 0.682353 0.686275 0.690196 0.694118 0.698039 0.701961 0.705882 0.709804 0.713725 0.717647 0.721569 0.725490 0.729412 0.733333 0.737255 0.741176 0.745098 0.749020 0.752941 0.756863 0.760784 0.764706 0.768627 0.772549 0.776471 0.780392 0.784314 0.788235 0.792157 0.796078 0.800000 0.803922 0.807843 0.811765 0.815686 0.819608 0.823529 0.827451 0.831373 0.835294 0.839216 0.843137 0.847059 0.850980 0.854902 0.858824 0.862745 0.866667 0.870588 0.874510 0.878431 0.882353 0.886275 0.890196 0.894118 0.898039 0.901961 0.905882 0.909804 0.913725 0.917647 0.921569 0.925490 0.929412 0.933333 0.937255 0.941176 0.945098 0.949020 0.952941 0.956863 0.960784 0.964706 0.968627 0.972549 0.976471 0.980392 0.984314 0.988235 0.992157 0.996078 1.000000)))

# end of curves tool settings


One tip, this curve works best with colorful images. Black stays unchanged and any shade of gray, including white, acts as though you've only tweaked the value. I may experiment to see if I can get white to play along.

A second tip, fine details result in a grainy picture. I had to add a blur to the parrot to get the smooth regions of color.

_________________
Just a short while ago I was a complete idiot when it comes to GIMP. Today, after many hours of practice, reading, and watching tutorials, I am proud to say I am an incomplete idiot.

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Artloader
 Post subject: Re: Psycho Delik
PostPosted: Thu Sep 08, 2016 6:56 am  (#2) 
Offline
GimpChat Member
User avatar

Joined: May 26, 2015
Posts: 410
Location: United Kingdom
Wow that is pretty psychedelic Sasquatch! It has an almost metallic feel to it. Nice work :).

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“Today, give a stranger one of your smiles. It might be the only sunshine he sees all day.” -- H. Jackson Brown Jr.

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Sasquatch
 Post subject: Re: Psycho Delik
PostPosted: Thu Sep 08, 2016 7:40 am  (#3) 
Offline
GimpChat Member

Joined: Jul 17, 2016
Posts: 293
Location: Arlington, TX
Thanks. I've gained a new appreciation for the power of the Curves tool. I plan to experiment more.

_________________
Just a short while ago I was a complete idiot when it comes to GIMP. Today, after many hours of practice, reading, and watching tutorials, I am proud to say I am an incomplete idiot.

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ofnuts
 Post subject: Re: Psycho Delik
PostPosted: Thu Sep 08, 2016 12:23 pm  (#4) 
Offline
Script Coder
User avatar

Joined: Oct 25, 2010
Posts: 4812
Sasquatch wrote:
Thanks. I've gained a new appreciation for the power of the Curves tool. I plan to experiment more.


I obtained a similar effect recently using Color>Map>Gradient map with a multi-rainbow gradient generated by script.

Attachment:
PsychedParrot.jpg
PsychedParrot.jpg [ 230.9 KiB | Viewed 2119 times ]


Code: Select all
from __future__ import print_function
import math

bands=32

def line(i,rgb1,rgb2):
    r1,g1,b1=rgb1
    r2,g2,b2=rgb2
    l=i/float(bands)
    m=(i+.5)/float(bands)
    r=(i+1)/float(bands)
    return '%2.6f %2.6f %2.6f %2.6f %2.6f %2.6f 1.000000 %2.6f %2.6f %2.6f 1.000000 0 0 0 0' % (l,m,r,r1,g1,b1,r2,g2,b2)

f=open('./%d-steps.ggr' % bands,'w')
print('GIMP Gradient',file=f)
print('Name: %d-Steps' % bands,file=f)
print(str(bands),file=f)
for i in range(bands):
    v=math.sqrt(i*256./(255.*bands))
    r=v if i%3==0 else 0
    g=v if i%3==1 else 0
    b=v if i%3==2 else 0
    print(line(i,(r,g,b),(r,g,b)),file=f)
f.close()


(Code provided as is for those who want to play with it, some python experience may be required).

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dinasset
 Post subject: Re: Psycho Delik
PostPosted: Fri Sep 09, 2016 12:05 am  (#5) 
Offline
GimpChat Member
User avatar

Joined: Jan 20, 2013
Posts: 14835
Location: roma, italy
my personal contributions:

Attachment:
5049_ParrotOrig_MontageBW.png
5049_ParrotOrig_MontageBW.png [ 5.07 MiB | Viewed 2070 times ]


Attachment:
5049_ParrotOrig_MontageColor.jpg
5049_ParrotOrig_MontageColor.jpg [ 1.82 MiB | Viewed 2070 times ]

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Sasquatch
 Post subject: Re: Psycho Delik
PostPosted: Sat Sep 10, 2016 6:08 am  (#6) 
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GimpChat Member

Joined: Jul 17, 2016
Posts: 293
Location: Arlington, TX
Dinasset, that one in the top/center of your montage is a great effect. How did you do that?

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