Basics
- Blending modes of Photoshop & Co
- All Layer Blending Modes of Photoshop, Paint Shop Pro and other digital imaging programs with short explanations and the math behind. More...
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Basic articles (PDF)
The following links lead to selected german publications all concerning the image processing topic. You'll find several other articles on my personal home-page www.RalphAltmann.de.
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What is "color", actually? (German)
- A slider called »Hue« almost always changes the angle of the HSB or HSL color space. Download
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What is "saturation", actually? (German)
- When it comes to saturation, the situation gets even more complicated. Download
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What is "brightness", actually? (German)
- »Brightness«, just like saturation, can mean quite different things. Download
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What is "sharpness", actually? (German)
- Image details as seen on a pixel basis are just tonal value variations, more or less substantial shifts in luminance... Download
Book recommendation
(German)
Copyright notice
The copyright for all texts, images, Photoshop actions and plugins belongs to Ralph Altmann if not indicated otherwise. Usage is permitted only for private purposes. No further usage or distribution is allowed without the author's explicit acknowledgment.
The articles have been publicized with permission of:
