Public Domain

Cropp a webpage automatically

surgeon — Fri, 25 Sep 2009 02:46:33 +0200

You define a dictionary type directly inside the plugin script stating the layers and the area of the image you want to cropp, and you can give a resize factor (variable newsize) for the whole image. You can choose between opening all created cropped images in gimp or saving them.

Just edit the default images dictionary to your needs or test the script on the example xcf file available at

http://freshflesh.de/files/croppparkour.zip

You should have some basic python knowledge to use this script!

Diagonal Grid

Roy Johnson — Fri, 24 Jul 2009 20:17:42 +0200

Creates a new layer with a grid, rotated 45 degrees, to help you choose corners for cropping.

Move the grid until a line intersects a feature in your image, then crop so that the grid line meets a corner of your cropping rectangle. You can then use the grid to choose the opposite corner, but make sure you don't change either of the sides of your original corner.

Installs in FX-Foundry/Toolbox/Grids/Diagonal Grid

Separate Luminance

Roy Johnson — Thu, 02 Jul 2009 18:43:26 +0200

FX-Foundry/Color/Separate Luminance...

Creates two new layers: one containing the Luminance, and the other the Chroma information in the form of a Grain Merge. Optionally, it will color-enhance (maximize saturation in) the Chroma layer while still keeping it luminance-neutral.

This allows you to do noise-reduction and sharpening on the two layers separately.

Update (23-Jul-2009):
Noticed that highly-saturated colors exceed the ability of the grain-extract/grain-merge to handle without clipping the color, so I have made the excess color get folded into the luminance layer. Most of the time, it will be un-noticeable, and even when it is, it shouldn't make any real difference. If you want to be sure your Lum layer is pure luminosity, you can check Excess color on separate layer. When merging, always merge onto the Lum layer rather than merging the two color layers together.

Maximize Local Contrast

Roy Johnson — Wed, 01 Jul 2009 18:36:27 +0200

FX-Foundry/Photo/Enhancement/Maximize Local Contrast... Like Stretch Contrast, but instead of using the minimum and maximum pixel values from the entire image, uses the minimum and maximum in the vicinity of a pixel to compute its new value. Takes a while to run, but really brings out textures. Result is a Grain Merge layer that adjusts values of the original image.

This filter operates on the visible image, not on a layer or selection.

Radius indicates how wide a pixel's influence is. If you choose too small a value, adjustment will be too localized and the image will look patchy. Larger values take a bit longer to run.

Threshold indicates how many neighboring gray values above and below a value can be treated as the same, in finding minimum and maximum values. Purely a speed trade-off. Using very low values will make it very slow. Too high values will cause visible "steps" in color values. The latest version does not include threshold, but the older version is still available.

"Feather Haloes" helps smooth out haloes around high-contrast areas.

"Keep Min and Max Layers" leaves the intermediate layers in the stack so you can look at them if you're interested.

Update (21 Jul 2009):

New algorithm that works right without any compromises for speed. No scaling, no threshold. It does take a bit of time on large images; 45 seconds for a 1500x2000 pixel image on a modern but not especially powerful PC. The full 8-megapixel image took about 3 minutes. Most of the time is spent on grow-selection, so don't be alarmed when the progress meter seems to hang up for a while. There are just two grows and two feathers to do.
If you want a speed compromise, I've added Scaledown factor, which will reduce the time spent in selection a lot, but will add some time for scaling the image. There's essentially no loss of quality. Recommended for especially large images.

Updates (13 Jul 2009):

SPEED! Mapping of Min and Max is done on scaled-down layers. Now even large images can be done in reasonable time.
Feather haloes feature for more reasonable results on high-contrast images and images with big flat areas
Layer mask keeps narrow-contrast areas under control

Updates (9 Jul 2009):

Fixed the bug that left strange artifacts in the image.
Changed radius to work as a % of image size (maximum dimension)
Increased feathering and added limits to min and max layers to control haloes around small, high-contrast features
Got rid of sample images. Will find better examples.

LCh color selector

y-fujii — Mon, 15 Jun 2009 15:35:08 +0200

L*C*h (L*a*b* in polar coordinates) color selector module.

Just type "make install" to install this module (You don't need to rebuild the GIMP.) .

Map Scale Ruler Legend Generator

latinsud — Wed, 03 Jun 2009 01:00:20 +0200

It generates a ruler to embed into geographical maps. It allows to customize scale, colors and other things.

The main options are: Step(px) and Step(unit). They define the scale of the rule. Each "px" a step is drawn, representing "unit" kilometers, miles or meters, etc.

See the Screenshots

Photo Finish

dsplabs — Thu, 05 Mar 2009 08:40:14 +0100

Round photo edges and apply a shadow border, i.e., 'raise the photo'

Export Selection

jwdevel — Sat, 21 Feb 2009 22:40:56 +0100

This script pops up a GUI which allows you to save your selection to various places

The source is your current selection (or whole image if none) applied to one of:
- the current layer
- all visible layers
- all layers

The destination is one of:
- a PNG file (saved directly to disk)
- a new image in GIMP
- a new layer in the current image

New Guides Rule of Thirds

maldonadoga — Fri, 16 Jan 2009 22:31:09 +0100

This is a very simple script that adds the rule of thirds guides to the current image.

I used to add guide by guide by percent, then crop, remove the guides and add them again one by one. After many times I did it like that, I decided to create a script to do it faster, for which I had to self train on how to do it using script-fu, to avoid poor portability.

I created the script with my Fedora 8 Linux distribution for GIMP 2.4, but it also works for 2.6.

This script works for any platform that GIMP works with.

Installation procedure:

For Windows
Download the script and copy it to the following directory:
%ProgramFiles%\GIMP-2.0\share\gimp\2.0\scripts

For Linux/Unix
Download the script and copy it to the following directory:
/usr/share/gimp/2.0/scripts

Once installed, you will have a new option in Image -> Guides -> New Guides Rule of Thirds

Grid of guides

Gigi — Wed, 26 Nov 2008 00:22:17 +0100

Add a grid of guides from number of horizontal and vertical parts in GIMP.
Tested with GIMP 2.6