photo

Colour Match

bleg — Wed, 18 Nov 2009 07:49:16 +0100

Easily map colours from a source colour to a target colour. Very effective for matching skin tones across images or between people.

Relatively quick (but not earth shattering). It doesn't work with grayscale or indexed images. Has preview, works with selections and layers, etc. Very, easy to use, and quite useful for portraits or recolouring graphics.

A demonstration: Lenna's face is mapped to the colour of the feather on her hat. This was done by selecting a colour from her face, then selecting a colour from the feather.

If you have an x86_64 version of GIMP 2.7 on linux, bunzip2 and move the colour-match file to your plugin directory:
bunzip2 colour-match.bz2
chmod 700 colour-match (Make it executable)
mv colour-match ~/.gimp-2.7/plug-ins/colour-match

To build it type: gimptool-2.0 --install colour-match.c
You will need libgimp-dev, and libgtk2.0-dev packages if you didn't build GIMP from source.

The algorithm is based on the relative color remap plug-in by Lars Clausen ( http://registry.gimp.org/node/5442 ).

RSS Lightsaber (LSE) v0.9

spoilt_exile — Tue, 17 Nov 2009 23:26:13 +0100

RSS Lightsaber (or LSE) is a simple script for creating lightsaber effect in picture. The script base on my own algorithm.
Features:

Fast script's execution.
Independent setting for blur size of the lightsaber's core and glow around saber.
Some features to provide correct effects on extra large photos (above 20 Mp).

The basic documentation is inside archive. Enjoy!
Next release (v1.0 with new documentation and lessons) in December 2009.

Blur & Shadow

Guillaume57 — Tue, 17 Nov 2009 13:32:46 +0100

Creates a picture which is a duplication of the current picture blured as background,
and the current picture itself reduce with a border and shadow around it as foreground

Example:
Original picture :
Result picture :

Cheap HDR

theilr — Thu, 12 Nov 2009 05:05:32 +0100

Provides a kind of poor-man's HDR (high dynamic range). It doesn't actually increase the dynamic range; in fact, it decreases it, overall, but in a way that maintains local contrast. But this gives you some headroom to increase the contrast of the image overall, thus enhancing the local contrast.

Jagged Border

theilr — Thu, 12 Nov 2009 04:48:18 +0100

Creates a white (or black) border around an image that merges in with the image so that on a larger white (or black) background, the image appears to have a ragged border. This is similar to the Gimp's Fuzzy Border, but it adapts its jaggedness to the image. (Also unlike Fuzzy Border, it is deterministic, it does not depend on random number seeds.)

Some examples of what I mean by a jagged border that "adapts" to the image, which also illustrate the difference between a white and black border (it's not just the color), are shown in this triplet of images:

http://www.flickr.com/photos/theilr/4102672801
no border

http://www.flickr.com/photos/theilr/4103434084
white border

http://www.flickr.com/photos/theilr/4103433020
black border

An example (with a short animation) that shows how they are created:
http://www.flickr.com/photos/theilr/3644571097

Curve Bend Between Paths

ffaat — Thu, 08 Oct 2009 21:41:33 +0200

This is a simplified front end to the curve bend script to help in straightening a distorted image. Create two paths with a maximum of 17 nodes each (drawn from left to right) tracing the existing image top and bottom curve, and it the script will calculate the curve bend parameters and run it to straighten the image.

After running the script, you can crop as desired, or perform further correction by shearing, or rotating the image by 90 degrees, drawing two new paths and running the script again

Image in sample was provided by lontarm at gimptalk.

EDIT: I have updated the script so it gets the curve a bit better. As some distortions are wonky, I have also added a slider to let you adjust the correction. The default is 0 (none), positive is more correction, -ve is less correction. This should let you dial in more problematic images without having to fudge the curves.

-Rob A>

Exact Aligner

vtries — Fri, 02 Oct 2009 08:06:05 +0200

This script brings 2 pictures to an exact overlap.
The pictures must be in 2 different layers of the same image.
Get the layer 2 with 50% transparency. This makes both pictures visible in one projection.
You have to tell the script, which 2 points have to overlap. Therefore you stroke a path with a path tool in the image including 4 points. Point 1 will be aligned with point 3 and point 2 will be aligned with point 4.
The points build one path. So you can just click the 4 points consecutively.
More description is in the file.

Thanx
Volker Tries
(c) 2009

Vignette Script

Dom_C — Mon, 06 Jul 2009 23:15:52 +0200

Creates a vignette around a selection.

- Vignette based on selection and active layer.
- Softness, opacity, and colour of the vignette can be changed in the dialog box.
- Checking "Keep Layers" allows adjustment of vignette opacity after the fact.
- Also check "Keep Layers" if you have other layers visible otherwise they will be merged down.

Location: Filters/Light and Shadow/Vignette

This script is based on the vignetting method outlined by Sue Chastain
http://graphicssoft.about.com/od/gimp/ss/vignette.htm

Sample Pictures:

Original:

With a vignette applied:

This is the first script I've written, I taught myself enough scheme using the gimp tutorial over the weekend. Feedback is welcome!

Updates:

Version 1.2
- Effect is now consistent regardless of image size
- Renamed parameter from "opacity" to "softness"

Fix Overblown Areas

gfxcoder — Mon, 06 Jul 2009 22:25:17 +0200

This script helps fix overblown areas of an image. It's not as good as some other methods that must be done manually, but it's not bad. It will NOT fix clipped colors (maximum overblown areas); it only helps increase the contrast in bright highlights.

The script is located in "<Image> / Script-Fu / Enhance / Fix Overblown"

Feedback welcome!

UnsharpMask2.0.12 (Windows binary -source code)

PhotoComiX — Mon, 16 Mar 2009 06:00:38 +0100

This plugin is not more maintained but still works very well On Gimp 2.6 and even 2.7
Was developed by Peter Heckert , Windows binary were provided by Michael Schumacher. but the original side is offline from years and all old links dead

i am mirroring both source code and binaries to avoid it can get lost and i repost here also in the hope that may found more users and a maintainer (as i said still works very well ,from gimp 2.0 till 2.7 a maintainer may help for the future )

About the most obvious question, what is the difference with standard unsharp mask that is simple,
what gimp USM offer is a only a subset of what this plugin may do.

gimp USM works ,basically by adding a blurred duplicate ,that as result create a white halo around contour's edges.

As example if you have a black arrow on dark grey BG, a more or less wide white halo around the arrow will made it much more visible and the image more sharp
But that easily lead to effect similar to overdone HDR and work better on the darker part of the image to reveal less dark details

Well USM2 may do that but also the contrary, sharpen by adding a dark halo
To use a similar example may sharpen a gray arrow on a white BG by creating a dark halo around arrow's contour

"Dark halo" sharpening on photos look often more natural then white at the most usual settings,
while pushing for dramatic setting is usually a more pleasant and artistic effect,
( we are used to accept black outlines as in draw,comics, illustration, so are more acceptable for our eyes then white outlines ..
Note that a thin but very intense white halo around contours edges is identical to white outlines, as a thin and very dark halo is identical to black outlines ..this is relevant for "artistic" or "creative" uses )

Interface may look too complex at first but just draw a ideal line under the 4th slider will solve

All what up is "BASIC" : on 4 sliders there 3 correspond exactly to that of the Gimp USM
"+" is to regulate the "white halo sharpening" ,"-" to regulate the "dark halo sharpening"
(NOTE: If both"+" and "-" are set to 0 then plugin do not sharpen but create a gaussian blur )

All what after that ideal line is "ADVANCED" ...default is fine in most cases anyway from there you may correct the gamma, or dose the intensity of the effect differently on shadows, middletones and highlights.

More accurate information are included in the zip.
#####################################################################
If someone may provide a better description is welcome , i am a user and not a developer and my English is quite approximate.

DOWNLOAD
http://photocomix-resources.deviantart.com/art/Lost-Found-Gimp-UnsharpMa...