Smart object là gì? hướng dẫn cách tạo smart object, sử dụng smart object trong adobe photoshop đơn giản thành công


Adobe Photosiêu thị doesn’t turn layers into lớn smart objects by default, so it can be easy lớn forget how useful they are. But they have sầu some amazing benefits that you should know about – most of all, the ability to re-edit filters that you’ve applied to lớn a layer.

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That’s not the only reason to convert a layer to lớn a smart object, but it’s one of the biggest. Two others reasons that are important in photography are that smart objects make it easier to vì chưng image averaging & perkhung nondestructive transform/warps of layers. They are also helpful in graphic design for various purposes.

Table of Contents

Benefits of Smart Objects for Photographers

What Is a Smart Object?

A smart object is the ultimate non-destructive layer in Photoshop. Any edits that you apply khổng lồ a smart object can be undone or revisited; they’re never baked permanently inkhổng lồ the layer.

Let me demonstrate how a smart object differs from an ordinary layer. If you use Photoshop’s transkhung tool lớn shrink an ordinary layer, it will turn into a low resolution version of itself. Trying to lớn enlarge it back to lớn the original form size will give you a blurry image:

Resizing an ordinary layer in Photoshop

If you do the same process to a layer that has been converted lớn a smart object, you can shrink and reform size the layer khổng lồ your heart’s content, and it remains just as sharp:

Resizing a smart object in Photoshop

The nondestructive character of smart objects goes beyond just resizing layers, as I’ll show in a moment. First, though, let’s look at the different ways to lớn make a smart object.

How lớn Create Smart Objects in Photoshop

Converting a layer to a smart object is very easy in Photocửa hàng. You simply right clichồng on the layer in question and select “Convert to lớn Smart Object.”

You can also create a smart object out of multiple layers. Shift + cliông xã (or Ctrl/Cmd + click) khổng lồ select the layers you want, right click, and select “Convert to lớn Smart Object.” The layers will merge into lớn a single smart object layer. Photoshop then lets you choose how the component layers within the smart object blkết thúc together; just go to Photoshop’s top menu > Layer > Smart Objects > Staông xã Mode, và you’ll see a number of options.

You can also convert a layer lớn a smart object directly from Adobe Camera Raw, which I highly recommend. After you’ve opened a raw tệp tin in Adobe Camera Raw và finished your edits, just hold down the Shift key, and you’ll see that the “Open” button at the bottom of Camera Raw changes to “xuất hiện Object.” Cliông xã it, and the photo you’ve sầu been editing will open directly as a smart object for further editing in Photosiêu thị.

The “Open” button in Camera Raw changes khổng lồ “mở cửa Object” (highlighted in red in this image) when you hold down the Shift key

Benefits of Smart Objects for Photographers

There are tons of reasons lớn use smart objects in Photoshop, and I’m going lớn limit this article to lớn the three that I consider the most useful for photography. (You can see a longer list of what they vì, including some nibịt uses, on Adobe’s trang web.) Here are the ones that are the most important for photographers to lớn know:

1. Nondestructive Filters

Photoshop’s filter tools are a huge help for photography, especially now that the Camera Raw dialog has been added as a filter option in the newer versions of Photoshop. I routinely use the Camera Raw filter to make global adjustments in Photoshop, and I’ll also use filters lượt thích sharpening, noise reduction, và Gaussian blur on occasion.

But what happens if you apply a filter & only realize later that you went a bit too far? You might have khổng lồ delete the layer and start over, which can be a serious problem if you’ve sầu done a number of other edits to lớn that layer in the meantime.

Instead, if you convert a layer to lớn a smart object before applying any filters, they become “smart filters” instead. A list of all your smart filters appears under the smart object in Photosiêu thị, và you can double clichồng any of their names khổng lồ re-open the filter dialog.

Double click any of the filter names (highlighted in red) khổng lồ re-open their editing options

This can be a huge help for photographers. Did you realize too late that your earlier unsharp mask was too strong? Double cliông xã the words “Unsharp Mask” below your smart object, và you can tone down your prior edits. Missed a spot in a Camera Raw local adjustment? No need to delete the layer và start over; it’s all stored in the smart object and can be re-edited at any time by double clicking the title “Camera Raw Filter.” (This is why I recommover “opening as object” rather than just opening your image any time you finish working with a raw tệp tin in Adobe Camera Raw.)

You can even blend the smart filters using layer blover modes by double clicking the inhỏ on the right-hvà edge of any smart filter:

Double cliông xã this ibé to change the filter’s blend mode

Doing so will pop up a dialog that looks lượt thích this, allowing you to change the opađô thị and blover mode just like any other layer:


Overall, being able to re-vì chưng any filter edits is the biggest reason lớn convert a layer khổng lồ a smart object in Photoshop, at least for photography. Once you start using it, you’ll never look baông xã.

2. Nondestructive Transform

Another helpful reason khổng lồ use smart objects is to warp or transkhung the layer without permanently baking the transformation inlớn the layer. I demonstrated this earlier in the article, & hopefully you can see how it would be useful to have such an option for resizing different layers.

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However, this only really applies if you’re doing some sort of composite photography, whether surrealistic or something more grounded like sản phẩm photography. Not all photographers need lớn composite images together, but if you bởi, it’s best to lớn convert your layers khổng lồ smart objects before resizing them.

For example, if you were editing this composite image (taken by Nasim), you should start by converting each of the three moon layers to a smart object so as not lớn lose resolution when decreasing và increasing their size:

420mm, ISO 200, 10 seconds, f/8.0

3. Image Averaging khổng lồ Reduce Noise

The technique of image averaginghas really been growing on me lately, especially for applications like drone photography. By taking multiple identical photos and then averaging them together in Photosiêu thị, the total cấp độ of noise will drop substantially:


But how bởi you actually average a bunch of layers together in Photoshop? You could play around with the Opacity slider, but the easier way in many cases is lớn use a smart object.

First, select all the layers that you want lớn average by Shift + clicking. Right clichồng lớn convert them to a single smart object. Then, go lớn Photoshop’s top menu bar > Layer > Smart Objects > Staông chồng Mode > Mean. (Some photographers prefer Median instead of Mean, but I find that Mean works better.)

The layers will be averaged together perfectly, whether you have two layers or several dozen. (Though the stacking process is far from quiông xã if you have more than a handful of layers, so you might want to lớn take a stretch break while you wait.)

There are more reasons khổng lồ do image averaging than just reducing noise, including various graphic thiết kế applications. You can also experiment with different stachồng modes than Mean lớn get some interesting results. Regardless, smart objects are the way lớn do it.

Drawbacks of Smart Objects

The biggest issue with smart objects is that they take up more space than ordinary layers. You may notice Photocửa hàng slow down if you have too many smart objects (or a lot of smart filters). It will also make your tệp tin sizes much larger if you’re saving a file with layers, such as a PSD or PSB.

However, if you export as a JPEG or otherwise flatten the smart object layers, the tệp tin kích thước issue goes away. In other words, these drawbacks only apply when there are active smart object layers in your document.

Beyond that, you should keep in mind that some edits are not possible on smart object layers, such as using the brush tool, paint bucket tool, dodge, burn, blur/sharpen/smudge tools, and similar. These aren’t possible because, again, a smart object is the ultimate nondestructive layer. Photocửa hàng doesn’t have sầu a way to revisit these sorts of “paint on the picture” edits, so it just prevents you from doing them on a smart object in the first place.

If you’ve decided to bởi vì one of these edits anyway, you just need to rasterize the layer first. Rasterizing a layer turns it from a smart object khổng lồ a regular layer, allowing you khổng lồ make those edits. Just right cliông xã on the layer and select “Rasterize Layer.” You can also rasterize a layer by attempting lớn vày your edit (say, trying lớn paint on the layer) and selecting “OK” lớn rasterize the smart object when Photocửa hàng yells at you.

This dialog pops up if you try to lớn apply certain (permanent) edits khổng lồ a smart object


It’s not always necessary to lớn convert a layer to lớn a smart object, which is why Photoshop doesn’t vì it by default. If you don’t need lớn apply filters, average layers, or perkhung warp/transform adjustments, it’s probably best to keep the layers as they are. By minimizing the number of smart objects, you can shrink the size of your PSD files và speed up Photocửa hàng.

However, smart objects are critical when you’re working with filters, which of course are some of the most popular tools in Photosiêu thị. Filters come inkhổng lồ play almost any time you want to lớn sharpen an image, apply an Orton effect, or simply make broad adjustments in Adobe’s Camera Raw dialog. In those cases, it’s usually not igiảm giá khuyến mãi to bake the filter inlớn the layer; instead, just convert the layer to lớn a smart object ahead of time so that you can revisit the filter later and adjust it khổng lồ your liking.

I hope this article helped you understvà why smart objects are so useful for photography. They’re also useful for graphic kiến thiết work; I use them constantly when making the various charts and illustrations you see on Photography Life. In fact, no matter what field of digital art you’re working with, nondestructive sầu editing is critical – & smart objects are an important part of nondestructive editing when you’re working in Photocửa hàng.

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