前二天有朋友貼了一個將會出現在Photoshop CS5的新功能，可以將許多物件或不規則形狀做自動拉伸及補償，其實這項功能在CS4也有，稱為Content-aware Scaling。
A friend of mine posted two days before there will be a new feature in Photoshop CS5, you can do a number of irregularly shaped objects or automatic stretch and compensation, in fact, this feature in CS4 is also known as the Content-aware Scaling.
In 2007, Shai Avidan and Ariel Shamir in the fairly well-known computer graphics computing SIGGRAPH conference which was published first in the Gimp graphics software was implemented in the technology, launched a group called Liquid Rescale the Plugin, Adobe was one of the hired on people, which in the CS4 launch Content-aware Scaling.
The principle of this filter is mainly applied to the fractal based, but in here to skip the first complex mathematical formulas, a look at the text description for the fractal, from the wiki, or a brief description here can learn:
【 "Fractal Geometry" (fractal) is a new math, it can handle irregular, amorphous and complex graphics, such as tree branches, coastline, animal horns, the river forks, mountain, snail shell diagram , cloud shapes, leaves, lightning and other shapes, with our learned Euclidean geometry, can not account for these special shapes, but the appearance of nature extremely complex and irregular patterns, are able to fractal geometry learn to be explained.
Fractal self-similarity, "self-similarity" refers to any portion of a graphical zoom in or out, you can still show the original patterns, but also refers to the overall graphics and some graphics have a similar pattern. Therefore, the fractal graphics infinite zoom, there will be very similar to the original graphic image. There are many forms of nature have fractal nature, cutting forests or mountain landscape photo of a certain part of its attached to another on the landscape photos, you often do not damage the impression that we have photos, which is a similarity owned by the shape and graphics features. 】
To know the nature of the fractal, you can begin to explain the use of the calculus of this filter.
First, a landscape like this map, the human eye seems there are many non-repetitive.
However, it's processed through the high-contrast, you can find into account the fact that there are still fractal distribution of similarity exists.
And this filter by the use of the place is that it will go automatically calculate this type of fractal distribution of photos of them, so in the process of telescopic pull-release, it will make automatic compensation of the action, so the human eye looks not easily detected flaws, while in the CS4 them, mostly used in the landscape.
CS5 the beginning of a feature film, it is beginning to such a principle, used in building the picture mend. Although there are still quite suitable for this filter for inorganic or landscape use, but for some image repair a number of steps have been substantially reduced.