Join Jan Kabili for an in-depth discussion in this video Resizing photos for print, part of Photoshop Elements 12 Essential Training.
In this movie, we'll talk about how to set the image size for a print here in the Expert Edit Workspace. We'll be talking about not only height and width of the photo, but also resolution. A concept that can be a little complicated, but that I'm going to try to simplify for you. So before I start changing the size of this image, I want to see how big it is. To do that, I'll go to this document information tab at the bottom of the document window and click there. And here I can learn that this photo has 1,800 pixels across and 1,200 pixels down.
Now, pixels are the unit of measurement that's used to measure a photo on screen. A pixel is a small square of color information. And the number of pixels you start with, is really the defining number when you're trying to change image size, because you can't increase the number of pixels without Elements making up some content. It can do that, but you don't always get the best result Now I mentioned that pixels are the unit of measurement when you're talking about the size of an image on screen. But, when we talk about the size of an image to print we talk about inches.
And so, if we want to know how many inches we can get out of this photo when we print it, we need to translate the number of pixels into inches. And the way we do that, is to allocate some number of pixels to every inch, it's just a simple division problem. But right now, we've allocated 100 pixels to every inch, if and when we print the photo, and that number is what mean when we talk about the resolution of the photo. It's the number of pixels that would be assigned to every inch if and when the photo were printed. So, if we assign 100 of these 1800 pixels across to an inch, we'll end up with 18 inches.
1800 divided by 100 gets us 18 inches. And the same is true of the height. There are 1200 pixels total. If we divide that into groups of 100 pixels, we end up with a total of 12 inches because 1200 divided by 100 is 12. Now I chose these numbers, because they're round numbers. And they seem to be the easiest way to explain the concepts to you. But the fact is, that if you did print a photo on a Desktop Inkjet printer with only 100 pixels allocated to every inch, the photo might look blurry.
And that's because most Desktop Inkjet printers need about 300 pixels per inch to do the best job. So let's see how we can change the resolution and the width and height of this photo. To do that, I am going to go up to the Image menu and choose Resize and over to Image size. Here in the Image size dialogue box, we see some of the information we just looked at. The width and height in pixels are 1800 by 1200. The current resolution is 100 pixels per inch, and when you divide that number, 100 pixels per inch, into 1800, you get a document that is 18 inches wide.
And when you divide 100 into 1,200, 12 inches tall. There's another number here, which is the total file space that the image will currently take up on your hard drive. And that's 6.81 megabytes. Now the first thing that I want to do here, is get the resolution right for my Inkjet printer. And there's are two steps to do that. First, I need to make sure that Resample Image is not checked. Because when Resample Image is checked, I'll be changing the number of pixels in the file. Either throwing pixels away or asking elements to make some up to add to the number of pixels.
So I want to leave Resample Image unchecked and then I'll go to the resolution field and I'll change that from 100 to 300. But keep your eye on the width and height fields just above that, as I change the resolution. The width and height in inches changed automatically, because I've changed the math problem. Now, I' m dividing 300 into 1,800. And that gives me a width of only six inches in my print. And when I divide 300 into 1,200, I get a height of only four inches for the final print.
So, the higher the resolution, the smaller the dimensions of the image can be. But this is the resolution that I need to get the best print. So at this point, I could click OK and go ahead and print my six by four image. But, let's say that I actually want to print a smaller image than six by four. I want a three by two to put in my wallet. Well in that case, I would actually be throwing away pixels. And when I want to throw away pixels, I have to check Resample Image". So for this problem, I'll check Resample Image, and I'll also tell Elements what formula I would like it to use when it decides which pixels to throw away.
Here it tells me that when I'm reducing image size, this is the best choice, Bicubic sharper. So, I'll choose that. And that will maintain the sharpness of the image, as it's resized. Now I said that what I want is a three inch by two inch image, but I still want 300 pixels per inch of resolution, because that's what my ancient printer likes for every print. So I'll come to the Width field and I'll change that to three inches. The height changes automatically to two inches. And if you look at the top of this dialogue box, you can see that I will now have fewer pixels in the final image.
I'll only have 900 pixels in width and 600 in height. And the size on the hard drive has gotten much smaller too. From 6.18 megabytes down to 1.54 megabytes. As I Click OK, to throw away information in the image and resize my file down. And when I come down to the document information area, you see that I do have the 3 inch by 2 inch photo at 300 pixels per inch. If I were to save the photo and then I wanted to make it bigger, I really couldn't do that without risking getting a blurry print.
So you do want to avoid upsizing your photos. Although you can do it a little. And Elements will just make up pixels to fill in the gaps. But, I urge you to keep one pristine full size copy of a photo. So, if you need your photo at different sizes, you can always go back to that large one to scale it down to the size that you need.
- Importing photos from a camera, computer, or iPhoto library
- Adding keyword tags and ratings to photos
- Automatically tagging people
- Organizing photos into albums
- Renaming and moving photos
- Correcting common photo problems automatically
- Retouching photos of friends and family
- Adjusting lighting and color
- Working with layers and layer masks
- Converting photos to black and white
- Cropping and straightening photos
- Adding text to photos
- Working with raw photos
- Making a slideshow
- Ordering prints
Skill Level Beginner
Enhancing a Travel Photo with Photoshop and Lightroomwith Jan Kabili54m 49s Intermediate
1. Importing Photos
2. Streamlined Photo Editing
3. Expert Editing Basics
4. Changing Size and Composition in Expert Edit
5. Working with Layers in Expert Edit
6. Using Selections and Masks in Expert Edit
7. Correcting Photos in Expert Edit
8. Processing in Camera Raw
9. Managing Photos in the Organizer
10. Working with Missing Files and Folders in the Organizer
11. Working with Virtual Albums in the Organizer
12. Keyword Tagging in the Organizer
13. Organizing Photos by People, Events, and Place
14. Sharing and Printing Photos
Setting up color management6m 30s
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