Light Filter：通过调整每个像素的色彩层次提供标准滤光片功能。
Light filter: Provides basic filtering by adjusting colour levels of each pixels.
实际上，这不过是一种幻象，只是网页上很多像素的叠加而已；但也正是这些细小的像素带你通往另一片天地——在那儿，你也会遭遇到现实世界中的麻烦。
In fact, it's all just a mirage, a lot of pixels on a web page, but these little pixels are the gateway to a whole universe -of real-world trouble.
本方法的精度是通过子像素的特征点提取和多片交会得到的。
In the proposed strategy, matching accuracy is enhanced by sub pixel interest point extraction and multi ray traingulation.
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