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PS中的镜头校正功能 – 译学馆
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PS中的镜头校正功能

Photoshop Playbook: Lens Correction in Photoshop

Photoshop教程: 镜头纠正
Photoshop Playbook : lens correction in Photoshop
无论你是用的是哪种类型的相机
No matter what sort of camera you are using,
都会在镜头方面 遇到些问题
you are going to encounter certain problems with the lens.
由于镜头制作方式的原因
Because of the way that lens are made,
你们会遇到照片失真的问题
you are gonna have problems with distortion
就是画面渐晕的变形
which is the bending of the image vignetting,
即画面暗角或色差
which is the darking of the corners or chromatic aberration,
也就是画面色彩的散射
which is the color fringing.
这种情况 在低端移动设备中 或 在如GoPro相机这样的设备中 存在极为普遍
And this is most prevalent in low-end mobile devices or something like the GoPro.
而这种情况 在配置了蔡司镜头的高端数码单反相机中 也不是不会出现
But you’ll also notice it on a high-end DSLR with a Zeiss lens,
尽管蔡司的镜头价格昂贵 品质上乘
even though it’s a very expensive fancy prime lens,
但依旧会出现这方面的问题
there are still problems with it,
我们对这些问题 可以用软件来解决
and we can account for that in software.
那么 我要向你们演示一些小技巧
So, I wanna show you some tips and tricks
来把这些镜头造成的人为现象
for how to get those artifacts
从你的照片之中消除掉
caused by the lens out of your image.
好 那么 我们来看第一张图片
OK, so the first image we’re gonna look at
其格式为DNG 即是RAW
is a DNG file, a RAW file.
那么 这张图片当然用“Camera Raw”软件来打开
So, naturally that’s gonna open in Camera Raw.
我们只需要使用“镜头校正”功能
And all we need to do is coming to Lens Correction
我们看到这里有一个功能切换的小选框
and we’ll see that there is a little toggle here.
不仅能把许多画面扭曲去除
and not only will that remove a lot of the distortion,
恢复画面四个边角
and fall out in the corners,
而且 这里还能显示出图片拍摄使用的是“Cannon”相机
but it also show us that this was taken with my Cannon
使用的是17-40型号镜头
with a 17-40 lens
那些广角镜头
and those wide angle lenses
的确造成了不少画面的扭曲
really have a lot of distortion
这里扭曲造成的不同 十分明显
so pretty prefound difference there.
如果 我没有Raw格式图片 却要使用“CameraRaw”软件
If I wanna go to Camera Raw and I don’t have a raw file
记住你只需要改变Photoshop打开方式
remember all you need to do is go over to Photoshop
“设置”—“文件处理”—“CameraRaw”设置
– Preferences-File Handling-Camera Raw Preferences,
进行设置来打开非RAW格式文件
and tell it to open those non-raw files.
现在 使用Photoshop CC 版本软件
Now, using CC and
然后 我可以应用“”Camera Raw 滤镜”功能
later I can just come into ‘Camera Raw Filter’.
对于这张图片 我可以马上来到这里
and with this image, I can pop in there
这里有我想达到的图片效果
and there is another thing I wanna do
这些效果都在菜单选项中
which is in the menu section.
点击图标“A”
I’m gonna hit A
就可以应用“竖直校正功能”
and that’s going to apply ‘Upright’.
除了“镜头校正”以外
In addition to lens correction,
它可以把图片调正 并快速进行透视校正
it’s gonna stand the image up and do a quick perspective correction.
那么 这里我可以做另一些事情
So, it’s another thing I can do there
现在 在Photoshop中 也有这种功能了
Now I do have some of this functionality in Photoshop as well
只是实施起来 略有不同
and the implementation is slightly different,
那么 如果我选择“滤镜”菜单
so if I come to the filter menu
选择“镜头校正”功能
and go to Lens Correction
我将看到一个不错的对话框
I’ll see this really nice dialog
来处理相同的问题
for solving the same problems.
我可以看到 这里显示了我的iPhone 5s手机
And I can see that I’ve got my iPhone 5s
可以自动识别 你使用的什么相机
we automatically know which camera you are using,
什么镜头 什么组合 我们有所有这些的配置文件
which lens, which combination, we have profiles for all of those.
在你看不见你的情况下
In the event that you don’t see yours,
你可以点进来 并且可以手动选择它
you could come in here, and you could manually overwrite this.
因此 如果是GoPro的连续镜头
So, if this were GoPro footage
或者用莱卡拍的 或者其他的照相机
or something of a Leica, or anything else
我可以手动选择我的相机和镜头
I can choose manually my camera and my lens.
所以 举一个例子
So, just for the sake of an example,
让我们看看在iPhone3G上的这个
let’s look at this on an iPhone 3G.
这是很小的不同 但有区别
It’s a minor difference, but there is a difference.
现在 最棒的是我也可以把它应用到视频中
Now, what’s great about this is I could apply it to video as well
无论是你的高端数码单反视频还是像这个例子一样
whether it’s your high-end DSLR video or for the sake of this example
只是一个低解析度的视频文件
just a low-res video file
在我的iPhone上
off of my iPhone.
所以 我可以确定这个视频
So, I can confirm that that’s video
我想从视频中去除镜头中的一些问题
and I wanna remove some of the problems with the lens from the video.
为了做到它
In order to do that
我点进来然后把它转换成智能过滤器
I just come in here and I convert it to a smart filter
使它成为智能过滤器或者智能对象
making it a smart filter or a smart object
将允许我们处理该视频
is going to allow us to process that video
这些做完后
and with that done
我将返回到镜头矫正
I’ll come back into Lens Correction
你会注意到这里没有信息
and you’ll notice there is no information down here.
视频文件清除了这些EXIF数据
Video files wash away that EXIF data.
你没有任何信息来告诉你哪个照相机或镜头
You don’t have any information to tell you which camera or lens,
那么我们需要进行手动选择
so we need to manually overwrite that.
因此我就说Apple
So I’m gonna just say that’s Apple
iPhone 5s
iPhone 5s
我把镜头校正应用到视频中
and I’ve applied lens correction to video.
你也许会注意到我在Photoshop中的一个选项
You might notice one of the options that I have here in Photoshop
是我能在网上搜索
is I can search online.
除了我们构建的所有配置文件之外
So in addition to all of the profiles that we’ve built.
可以在线搜索其他用户构建的配置文件
You can search online for profiles that other users have built.
如果你喜欢 你可以去labs.adobe.com
And if you like, you can go to labs.adobe.com
并按下配置工具来构建自己的
and pull down a profiling utility to build your own.
我想你会发现他们中有很多人
I think you will find there are a lot of them out there
你要确保做更新的原因之一
and one of the reasons you wanna make sure to do updates
是我们不断更新我们的支持
is we’re constantly updating our support
从不同的相机和镜头
for different cameras and lenses.
但是如果你找不到你想要的东西
But in the event you don’t find what you are looking for,
或者你只想再深入一点
or you just wanna go a little deeper,
你就可以创造自己的
you could create your own.

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