CHỈNH BIT DEPTH TRONG PHOTOSHOP

Working in 16bit will give you more control over your artwork & produces a much better final result. Learn how to lớn set up your work for 16bit.

Bạn đang xem: Chỉnh bit depth trong photoshop


*

Bit depth refers lớn the number of variations of a single colour (Red/Green/Blue) which can exist in your image. I don"t want lớn get too technical in this article as you"ll find plenty of information online about it. Instead, I want lớn show you the benefits of working in 16bit.

If you have a little understanding of bit depth you might think that, since a jpg tệp tin is only 8 bit, there"s no benefit to working in 16 bit if you"re saving your image as a jpg. This would be an incorrect assumption!

Let"s first outline 2 facts:

8 Bit colour has 256 shades of Red, Green and Blue for a total of 16,777,216 colours (256x256x256)16 bit colour has a whopping 65,536 per channel! That means a total of… a lot. (~280 trillion colours).

If you"re interested in understanding more about the above, kiểm tra out the Wikipedia page on colour depth.

But... 16,777,216 Colours is a lot!

Yes, while that is true, the problem is that often in our art, we are only using a small sub-set of colours và often with a gradient, this is where you will notice the limitations the most.

As you can see in the image below, the gradient in the sky becomes heavily degraded when we use 8bit.

Xem thêm: (Trọn Bộ) Phim Tân Tam Quốc Diễn Nghĩa (Thuyết Minh), Tân Tam Quốc Diễn Nghĩa

*

So how bởi we fix this?

Ideally, we could work with 16bit source files all the time. However, JPG files don"t support 16bit và most 16bit formats are big. However, you can gain most of the benefits of working in 16bit simply by converting your Photoshop documents to 16bit at the very beginning of your work!

Simply head to lớn Image -> Mode -> 16bit, lớn convert your Photoshop document to a 16 bit file.

*

By doing this this at the start of your work, any edits you make to images in this document will have the benefit of 16bit colour. It doesn"t replace the benefits of using a 16bit source file, but it"s a good step!

Beware of RAW files!

For some unknown reason, Adobe don"t import RAW files as 16bit documents by default! From a professional standpoint this is nuts, but luckily we can change the setting easily & it will remain phối correctly!

*

To vì this, mở cửa a RAW tệp tin by dragging it into Photoshop or go to lớn File->Open. The Camera Raw dialog window will appear. You want khổng lồ click the white underlined text at the bottom.

This will then xuất hiện another settings dialog where you"ll see the "Depth" setting and can change it to lớn 16 bits/Channel.

*

Thankfully, once we have made this change the setting will stay this way... At least until we reinstall Photoshop!

Bit Depth "Popping"

Sometimes while you work on a 16bit tệp tin in Photoshop, you"ll notice a weird visual artefact as you zoom in và out. Check it out in this example:

As the Canvas zooms in, you"ll notice a "pop" where the image unique and banding seems lớn improve. Rest assured, when this happens it is simply the limitations of the software and/or your monitor in its ability lớn display the full colour range. If you are saving your file as a 16bit image then this visual banding won"t affect you.

If you are saving your file as a JPG, for instance, to mô tả online, you"ll may want to lớn address this issue as the final output đầu ra could potentially have some banding in it. To fix it you need khổng lồ bring some more range into your image either by changing the colour grading or replacing the sky with a better reference.

Want an in-depth video explanation?

If you"re looking for a more detailed explanation or some guidance on how lớn approach 16bit workflow in a professional capacity, kiểm tra out the "Working in 16bit" tutorial below!


Working in 16bit will give you more control over your artwork and produces a much better final result. Learn how to set up your work for 16bit.