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Photoshop CS4 for Photographers is an essential course for any digital photographer who wants to master the software's vast array of image enhancement techniques. Professional photographer and instructor Chris Orwig uses his own compelling images to demonstrate how the power of Photoshop can make photographers more passionate about their work. He covers many aspects of the application, such as working with RAW images, using curves and levels, making images snap, and enhancing bland photographs by converting them to black and white. Exercise files accompany this course.
All right, now that we have covered the topic of bit depth, the next step is to begin a talk about image size. And image size is actually pretty important, because if you don't understand an image size and if you don't resize your images correctly, as we will do in the next movie, you could have a lot of problems in Photoshop, right? So, I want to have a little bit of fun with this because the topic of image size can sometimes be a little bit convoluted. All right. Well, my wife is a teacher and she teaches a number of different grades in elementary school. Now one day I went to visit her classroom. It's really a fun to visit her classroom and see the kids and see all of that they're are working on and one day I saw this art project they are working on where they are making these little collages, these little montages and they were gluing kidney beans to paper plates in order to create some kind of a design or some kind of a picture.
And after l left their class, I thought, you know what? That is the perfect concept for understanding image size. So here it goes. Stick with me on this one. We'll have a little bit of fun with this. Let's say the students in Mrs. Orwig's class and say, Mrs. Orwig will you give me seven kidney beans? She says, okay here are seven kidney beans and the student goes back to his/her desk and says, you know what? I resolve to make a little picture out of these kidney beans on a 10 inch paper plate and so they then glue those kidney beans to the paper plate and what they are trying to do is to make face, but it just doesn't look very good. The gap between the kidney beans is too big. So they go back to Mrs. Orwig and say, Mrs. Orwig, you know, I need some more kidney beans. She says, all right, here seven more kidney beans. So he gets seven more and then the student goes back and says, you know what? I'm resolved to make this picture on a small paper plate, a five inch paper plate. And so student goes back and then puts those kidney beans on that paper plate and the art project looks much better.
So what's the deal with this goofy story? Well, you can think of kidney beans like pixels. That's the raw material, that's the stuff that we have to work with. Our resolution has to do with the size that we are determining to print or to make that particular image. So let's take a look that how this actually connects to Photoshop in more practical ways. Well, here's the Image Size dialog window. Now there are a couple of things that you can see here. Up top I have my Pixel Dimensions that's the raw material; those are how many kidney beans I have actually gotten from Mrs.
Orwig so to speak, right? So that's what I have to work with. And then the next story has to do with the Document Size. Now in my knowledge here, my story falls apart a little bit, but again try to stick with me on this one. Here's where we determine the size of the resolution of our image and here's where we are picking out that paper plate we are essentially kind of determine the gaps between the different pixels. So again jumping backwards for a second the raw materials up top are resolution or we have decided to distribute that raw material is down below. All right, well, this still may be a little bit vague to you and if it is don't worry, because in the next movie, we are going to actually look at, how we can begin to resize our images.
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