The reason you can't always use 48 bit scans is because of two problems.įirst off, most monitors only display 24 bits. What do I mean you can't see 48 bit colour? Why? Because the problem with 48 bit scans is you CANT see it. See the images above? They're just simulations. Let's zoom in at the pixel level, and compare.Ī 48 bit scan has more colours to use. This means your scan colours will look a lot smoother. So you get a less smooth gradient, like the image above.īut when you use 48 bits, each channel gets 16 bits. In other words, LESS colours to fill in the pixels. And when you have less bits per colour channel, you have LESS colours to work with.Īt 24 bits, each channel only get 8 bits.
When you scan at 24 bits, you're going to have LESS bits per colour channel. Because what I'm going to show you will all make sense now. But I want you to know that this part is important. soon! What You Get When You Scan At 48 Bits But keep reading, and it will all make sense. When you scan at 24 bits, each channel gets 8 bits. When you scan at 24 bits, what you're doing is putting 8 bits per channel. Remember I told you your scan has 3 channels. So? So what if scans have 3 channels? What does this have to do with 24 or 48 bits? Now, when you add up all three channels, you get full colour. Your digital photos are made up of 3 channels: Red, Blue, Green. Why Does Your Scanner Use 24 Or 48 Bits Anyway? And you won't be wasting your time with your scan project. Once you know this, then you'll know when it's best to use 24 or 48 bit. So let me show you an EASY way to know what a bit is. I thought they had something to do with the resolution.īut after 10 years of scanning for a living, I figured it out. When I first started scanning, I had no idea what bits were. And let's go! Bits Have NOTHING To Do With Resolution and DPI Well, once you understand the difference between 24 and 48 bit scans, you'll know which bit is best for you.
Why not just always scan at 48 bit, right?
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