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After having spent a few minutes talking about pixels and bit depth, here what I am going to do is take a look at how we can handle and deal with those pixels when it comes to image resizing inside of Photoshop. And you know, image sizing is really important, because if we do this incorrectly, it will negate all of the rest of the work that we've done with our pictures. Well, let's go ahead and open up the Image Size dialog here. And at first glance this dialog, it's just a little bit confusing. We have Pixels and Document Size. Well, how does all of this make sense? Well, because this topic is a little bit confusing, what I want to do is try to make this a bit more practical or simple, and I want to do this by way of telling you a story and walking through a few slides.
At first it won't seem to really make sense, but then at the end, hopefully by talking about this in a comparative or analogous way, it will start to become clear. Well, let me move ahead to my next slide. My wife is a teacher, and one day I was visiting her classroom, and the students were working on these art projects using dried seeds. They were gluing these seeds down on different pieces of paper in order to create mosaics, or pictures. And I thought, "Gosh! That's a lot like working with pixels." So let's go with that comparison for a second.
Let's say that we're in that classroom and we go to the teacher, my wife, Mrs. Orwig, and she gives us a certain amount of kidney beans. Well, we have this raw material. It has a certain weight or maybe file size. We then resolve to create our art project on a 10-inch piece of paper or paper plate. Well, here our picture, the smiley face, it doesn't look very good because we didn't have enough raw information or raw data. We didn't have enough pixels. So we go back to the teacher.
She once again gives us the same amount of information. But this time, we resolve to use a smaller paper plate, a 5-inch paper plate. Well, now our project, it kind of makes sense, it works. So here you can see the raw material or the kidney beans, and also how we resolve to display those, well, it really matters. And ideally what we do, is we have enough information in order to create something which is stunning and we choose an appropriate resolution to do so, kind of like my niece here, Evie, who created this fun mosaic here around Thanksgiving time.
Well, enough with the story. Let's now go back to the Image Size dialog and start to make some comparisons. Well, if you look at this top area, the Pixel Dimensions, this is all about the raw material. These are the kidney beans. This is how much stuff we have. You know, if we scoop up some kidney beans, this weighs something. You can see here that the pixel dimensions-- what really affects our overall file size, this document--it's 20 Megs. Well, how then does this compare to, say, the document size? Well, the document size is kind of like that paper plate.
We have certain dimensions. We also have Resolution, in other words we can define how close together these pixels are displayed. So if we take this a little bit further and compare this to our project, again, the pixel dimensions, the raw material, that's kind of like our kidney beans. The Document Size, it's very similar to that paper plate, and we need to know how to work with these two different areas of this Image Size dialog together in order to effectively resize our photographs.
So now that I've introduced this whole topic of the Image Size dialog and pixel dimensions and document size, let's really see how this works when we work on an image. And let's do that in the next movie.
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