Digital photo's allow for more easy manipulation of e.g tonality and color balance. With the help of Bibble it is easy to make the picture darker or lighter. Alter the black,- and whitepoint of an image, change the tonality with a curve. Usually these digital image manipulations are direct translations of already existing darkroom techniques.
With digital photo's it is possible to extend the set of techniques furter. Digital image manipulation makes it possible to more easily manipulate colors than what was possible with traditional chemical based color photography.
Traditional systems for color photography hover lacked more control over the color dimensions of an image. Yes, it is possible to change to color balance, but it is hard to get full control over the color appearance in an image. The reason for this is that it is almost impossible to do with traditional chemicals in a darkroom.
Digital photo's can be thought of as large number of different colors. These colors can be placed into a so called 3D "Uniform Color Space" called CIE L*a*b. This color space has white positioned at the top, and black at the bottom. On this straight line from top to bottom you can find all grays. The points here do not have a color. Around this line lie all colors. The more further away a point is from the gray axis, the more colorfull it looks.
The distance from the white - black axis is called, the "Chroma" dimension. With the Spectrum plugin it is possible to manipulate this feature. The Spectrum plugin has 12 sliders. Each slider controls how much the chroma component of a color falling into a section of the color space will be altered. This is also called a chroma curve. This allows one to e.g. make yellow parts more yellow without touching other colors, or the tonality of the image.
Watch this space. I'm working on some examples.
Download: Spectrum 1.0 (For windows, Linux and Mac)
If you like the Spectrum plugin, or if it benefitted you in some way, please consider making a small contribution. It will be highly appreciated.
Spectrum is provided free of charge. Spectrum is copyright 2007 by Maas-Maarten Zeeman, all rights reserved.