模拟Velvia反转片CS3处理过程

兼回石头GG,处理过程如下:
1,使用CS3,打开图像,数码相机拍摄的时候最好不要用艳丽模式。我都调整raw优化校准为标准。
2,新建图层组Velvia,选择Velvia图层组。
3,图层->新建调整图层->通道混合器,输出通道选择红色,将红色设置为140%,另外两个色绿色和蓝色都设置为-20%,总数值为100%,根据图像的具体颜色调整这个比例值。
4,图层->新建调整图层->通道混合器,输出通道选择绿色,将绿色设置为140%,另外两个色红色和蓝色都设置为-20%,总数值为100%,根据图像的具体颜色调整这个比例值。
5,图层->新建调整图层->通道混合器,输出通道选择蓝色,将蓝色设置为140%,另外两个色红色和绿色都设置为-20%,总数值为100%,根据图像的具体颜色调整这个比例值。
6,选择Velvia图层组,图层->新建调整图层->曲线,调整曲线,让曲线成为弯曲弧度很小的S形,加大中间调的对比度,根据直方图以及中间调像素点确定弧度大小。
7,选择Velvia图层组,此时Velvia图层组混合模式为穿透,根据图像效果,调整图层组的不透明度,可以使用滑块来作细节调整。
8,合并所有图层
9,复制背景图层,选择背景图层,滤镜->锐化->智能锐化,将数量设置为70%,半径设置为0.6,确定。把图像放到100%,根据锐化效果调整数量值和半径。
这样就获得了模拟Velvia反转片的高色彩饱和度,高锐度和超细腻颗粒效果。

三更天 发表于 2008-7-16 52 views | 类别: 技术闲扯

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  1. #1RedRocks @ 2008-7-16 10:40 回复

    谢谢哥哥啊, 我找机会44看。 前面的图层感觉, 怎摸好像就是在调整饱和, 只是把没个通道分开调整了一下。
    细腻是最后的智能锐化。。 那部分。。 你得根据你的图片大小来选择半径设置。。 如果是原图。。 那0.6 就小了点呢。

  2. #2三更天 @ 2008-7-16 10:58 回复

    大哥,锐化的时候半径(Radius)是决定作边沿强调的像素点的宽度。如果半径值为1,则从亮到暗的整个宽度是两个像素,如果半径值为2,则边沿两边各有两个像素点,从亮到暗的整个宽度是4个像素。半径越大,细节的差别也清晰,但同时会产生光晕的。我情愿多次锐化,也不愿一次将锐化半径设置超过1个像素。特别在风景图像。我就是对原图作的。
    关于通道混合器就不说了,那个说起来太麻烦。当然,确实也是加深饱和度,这个说法肯定的。对每一个通道而言,为了让红、绿、蓝色阶值相等的那些象素(黑、白、灰的地方)保持不变,比如某点色阶值为(100,100,100),经过变化后仍是(100,100,100),所以保持该通道100%的数值不变,但是对颜色饱和度加深。

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