模糊(Blurring)和羽化技术对于任何照片编辑器(photo editor)都非常重要。这些工具可以帮助您无缝组合图像，使您的编辑看起来更加自然和赏心悦目。
尽管模糊和羽化相似，但它们是两种不同的工具。羽化是指软化图像的硬边缘，使其渐变到背景或其他图像中。模糊(Blurring)允许您模糊图像的任何部分，使其变得模糊，并混合在一起。
这两种技术都有很多用途，而且很容易学习。按照以下步骤学习如何在Photoshop中进行羽化和模糊处理。
如何在 Photoshop 中羽化(How to Feather in Photoshop)
您首先需要在Photoshop中创建一个新项目，或者打开一个您想用作羽化图像背景的图像。羽化(Feathering)主要用于在照片上创建晕影效果。因此，请选择您希望主图像融入其中的背景。
File > Open要羽化边缘的图像。该图像将在 Photoshop 的新选项卡中打开。您现在将在此选项卡中工作以羽化图像。
现在，选择选框(Marquee)工具，矩形或椭圆形。使用此工具，选择要保留的图像部分。选择线将是羽化开始的边缘。
做出选择后，单击图层面板底部的添加蒙版图标。
您只会看到您选择的图像部分。要实际羽化图像，请打开Properties面板，您应该会看到一个标有Feather的滑块。您可以使用它来柔化选择的边缘。使用此滑块，您可以根据需要尽可能多地或尽可能少地混合边缘。
如果您想要更精确的选择和羽化，而不仅仅是矩形或椭圆形，您还可以选择其他选择工具，例如快速选择或套索工具，并使用它创建蒙版。这样，您可以创建外观无缝的选择，而不会出现任何锯齿状或波状边缘。
如何在 Photoshop 中进行模糊处理(How to Blur in Photoshop)
也许，您不想使主体的边缘羽化，而是希望整体模糊背景(background)。您还可以使用选择工具来模糊您想要的图像的任何部分。这有助于突出您作品的主题，并使其整体更具凝聚力。
在Photoshop中打开您希望对其进行背景模糊处理的图像。然后，使用快速选择(Quick Select)工具围绕要保持可见的主题进行选择。现在转到Select > Select And Mask。
您可以在此处使用画笔工具使您的选择更加精确。当您对选择感到满意时，转到“输出设置”(Output Settings)下拉菜单，在“输出到”(Output To)设置中，选择“带有图层蒙版的新图层”(New Layer with Layer Mask)并选择“确定(OK)” 。
现在，您将有两层。背景层和带有您选择的蒙版层。您可以通过单击图层左侧的眼睛图标来隐藏带有蒙版的图层。然后，按住Ctrl键并单击隐藏层以查看选择。
转到“Select > Modify > Expand”，使选择稍微超出主题的边缘。现在，确保您的背景层通过选择它突出显示。
您需要在此选择上使用Content Aware，您可以通过按Shift + Del来完成。在Contents下拉列表中，如果尚未 选择Content Aware ，请选择 Content Aware。(Content Aware)
现在，您将能够在不模糊主题的情况下模糊背景。单击(Click)主题图层旁边的眼睛图标，您将只看到带有填充选择的背景。但请确保您的背景层仍然突出显示。
转到Filter > Blur Gallery > Field Blur。在右侧，您会看到一个模糊( Blur )滑块，您可以使用它来更改背景的模糊程度。您可以移动中间的圆形指针以移动应用模糊的位置。
如果您只想模糊背景的某些区域，还可以使用光标设置新指针。如果您对所产生的模糊效果感到满意，请选择确定。(OK)现在，您可以使用您的主题重新打开图层，它应该比以前更加突出。
如何模糊选定区域(How to Blur a Selected Area)
也许您不想模糊整个背景，而只想模糊图像中的选定区域。这可能是为了隐藏人们的面孔或敏感信息（街道名称、电话号码等）。使用选择工具非常容易做到这一点。
打开图像后，单击具有您想要使用的任何形状的选框(Marquee)工具，然后围绕您想要模糊的内容进行选择。然后去Filter > Blur > Gaussian Blur。
将出现一个窗口，可让您将高斯模糊效果应用于所选区域。使用半径滑块并将其向上移动以完全模糊该区域。然后选择确定(OK)将此模糊应用到图像中的选定区域。
How to Feather and Blur in Photoshop
Βlurring and feathering techniques arе important for anу photo editor to learn. These tools can help you to seamlessly combine images, making your editing look more natural and eye-pleasing.
Although blurring and feathering are similar, they are two different tools. Feathering refers to softening hard edges of an image, so that it gradients into the background or other image. Blurring allows you to blur out any parts of an image so it becomes hazy, and blends together.
Both these techniques are useful for many purposes, and they’re easy to learn. Follow the steps below to learn how to feather and blur in Photoshop.
How to Feather in Photoshop
You’ll first want to create a new project in Photoshop, or open an image you want to use as a background for your feathered image. Feathering is mainly used to create a vignette effect on photos. So choose a background that you want your main image to blend into.
Once you have your project created, open the image you want to feather the edges of by going to File > Open. The image will open in a new tab in photoshop. You’ll be working in this tab now to feather the image.
Now, select the Marquee tool, either rectangular or elliptical. With this tool, select around the part of the image you wish to keep. The selection line will be the edge where the feathering begins.
Once you’ve made your selection, click on the add mask icon at the bottom of the layer panel.
You’ll only see the part of the image you’ve selected. To actually feather the image, open the Properties panel, and you should see a slider labeled Feather. You can use this to soften the edges of your selection. Using this slider, you can blend the edges as much or as little as you want.
If you want to have a more precise selection and feather more than just a rectangle or oval shape, you can also choose other selection tools like the quick selection or lasso tool and create a mask using that. That way, you can create seamless-looking selections without any jagged or choppy edges.
How to Blur in Photoshop
Maybe, instead of feathering out the edges of a subject, you want to blur out the background as a whole. You can also use selection tools to blur out any parts of an image you want. This can help to highlight the subject of your piece as well as to make it more cohesive overall.
Open the image in Photoshop that you wish to do some background blurring on. Then, use the Quick Select tool to make a selection around the subject(s) you want to keep visible. Now go to Select > Select And Mask.
You can make your selection more precise here using the brush tools. When you’re happy with the selection, go to the Output Settings dropdown and in the Output To setting, choose New Layer with Layer Mask and select OK.
Now, you’ll have two layers. The background layer, and the mask layer with your selection. You can hide the layer with the mask by clicking the eye icon on the left side of the layer. Then, hold down the Ctrl key and click on the hidden layer to see the selection.
Go to Select > Modify > Expand so that the selection goes a bit over the edge of your subject. Now, make sure your background layer is highlighted by selecting it.
You’ll want to use Content Aware on this selection, which you can do by pressing Shift + Del. In the Contents dropdown, select Content Aware if it’s not chosen already.
Now, you’ll be able to blur out the background without blurring your subject. Click the eye icon next to your subject layer and you’ll see only the background with the filled-in selection. But make sure your background layer is still highlighted.
Go to Filter > Blur Gallery > Field Blur. On the right side, you’ll see a Blur slider that you can use to change the amount the background will be blurred. You can move the circular pointer in the middle to move where the blur is applied.
You can also set new pointers with your cursor if you want to blur out only certain areas of the background. Select OK when you’re happy with the resulting blur effect. Now, you can turn the layer back on with your subject and it should stand out much more than before.
How to Blur a Selected Area
Maybe instead of a whole background, you want to blur out just a selected area in an image. This could be for things such hiding people’s faces or sensitive information (street names, phone numbers, etc). This is incredibly easy to do using selection tools.
After opening the image, click on the Marquee tool with whatever shape you want to use, and then make a selection around what you want to blur out. Then go to Filter > Blur > Gaussian Blur.
A window will come up that will let you apply the effect of the Gaussian blur to your selected area. Use the radius slider and move it up to fully blur out the area. Then select OK to apply this blur to the selected area in your image.
