One of the things I've done as a result of thirty plus years of interest in photography is judge a lot of photo competitions. Something that's sure to garner a photographer a lower than possible score is obviously punching buttons without knowing a little of the history of what the effect is. In Photoshop there's a filter called Solarize. People will click on it, see an interesting effect and say they created an artistic image. Some think solarization, or more accurately the "Sabattier Effect", is something out of the minds at Adobe. The reality is that it's an effect that's been around for about 180 years. Some of the legends of photography are names associated with early experimentation with image manipulation. Have you ever seen, or heard of, a "Daguerreotype"? Louis Deguerre mentioned the effect in some of his notes. He didn't have a name for it, but through experimentation he described it. One of the attributes of solarization of an image is the development of Mackie Lines. Lines of contrast around the most prominent edges of elements in the image. Alexander Mackie is credited with being the first to describe the lines found in the effect. Today's image is obviously not a solarization of the scene, but is another old, wet darkroom effect. To find out what the effect is and how it has become a "button" to push in Photoshop, hit the "read more".
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