Light filter: Provides basic filtering by adjusting colour levels of each pixels.
Light Filter：通过调整每个像素的色彩层次提供标准滤光片功能。
Use the Outer glow option to add a very slight grey border, adjusting the Spread to the Max will turn the default glow into a solid strip of colour which helps add this double stroke effect.
继续用外发光来添加一个浅灰色的边，调整扩展值到最大这样我们可以得到一个双边线效果。
Two kinds of effective colour modifying technology have been attained by adjusting a series of parameters:(1) the technology of partial step up pressure and high temperature heat treatment;
通过改变和调整条件参数后，得到两种效果较好的改色工艺：（ 1 ）局部增压高温加热法改色工艺；
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