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In this tutorial, you will use Photoshop Elements to:
When finished, this image will look
like this, (though bigger)
Special thanks to Gary Sturgeon
for permission to use his great aerial shot of Bermuda!
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Photoshop Elements Basics
For all of the work in this tutorial, you will want to use the "Aerial
Bermuda" photo. Click here to download
that image.
If you are brand new to the program, you may want to print our handy guide which labels
all of the tools and palettes in the program. If you want to view it online,
look here.
Open and Crop the "Aerial Bermuda" Image
Open Aerial Bermuda Image:
If you need to download this file, click here. You can open an image two ways:
- When you first open the program, you will have a dialog box that asks
if you want to create a new image, or open another, among other options.
Click 'Open" then find the image where you saved it on your hard drive.
-- or --
- If your program is already open, select "File" from the menu
at the top of the screen, select "Open", and find the image on your
hard drive.
Crop your image: Screen shot - screen shot crop
We want to eventually make a map of this image, but we don't need the picture
of the plane engine in the image. We are going to use the crop tool to crop
that out of the image.
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Select the crop tool in the tool palette.
- Draw a box with your cursor over the part of the image you want to
keep. You will see crop 'handles' around the good part, and the rest will
be blacked out. If you want to change the selection, grab one of the
crop 'handles' and drag.
- When the crop selection is what you wanted, hit "enter"
on your keyboard.
Correct the Color Using Recipes
Photoshop Elements offers "recipes" - step by step instructions for popular
procedures. Because this image was taken from a plane, the color is a bit
off. There are several ways to correct color in Photoshop Elements or Photoshop,
we're going to let the recipes guide us. Screen shot - screen shot adjust
color
- At the top menu on the screen, click on the "Recipes" tab.
- In the pop up menu (it says "Select a Recipe") choose, "Color Correction".
- Select the "Adjust Brightness and Contrast" recipe.
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Follow the three steps to adjust the brightness and contrast.
- Choose "Enhance" > "Brightness/Contrast" > "Brightness/Contrast".
- Drag the Brightness and Contrast sliders to the desired settings.
Drag the Brightness slider to the left to decrease the level of brightness:
drag to the right to increase it. Drag the Contrast slider to the left to
decrease the level of contrast: drag to the right to increase it. The
text box to the right of each slider displays the brightness or contrast value.
Make sure that the Preview check box is selected to view the changes as you
drag the sliders.
- When you are done, click "OK".
Re-size the Image to Use on a Web Page
The aerial bermuda image is a little big for a typical web site. How do we
know that? By looking at the size of the image in pixels. When we measure
a piece of paper, we use inches or centimeter. When we measure monitor size
(also called resolution), we use little squares called pixels. Here's the
tricky part: monitors are all different sizes: some are 800 by 600 pixels,
others may be 1024 x 768 pixels. When we need to decide how big to make an
image for a web page, if it looks good on smaller monitors (800x600) it will
also look good on the larger ones. So , let's think of our monitor as 800
pixels wide by 600 pixels tall. Look at the image on the right. If you want
an image to be the size of the black box (A little less than half of the
web page...) what size would you want it to be? You can estimate: "if a screen
is 800 pixels wide, and I want my image to be half of that, it will a little
less than 400 pixels wide".
Our image is wide, but not very tall. We want it to be big, but not take
over the whole screen.
- To adjust the size of an image (or find out how big it is) Go to the
menu at the top of the screen and select "Image" -> "Re-size"
-> "Image Size..."
- Notice the width of the image is 800 pixels and height is 350
pixels. (You may be looking at the size in percent, instead of pixels...
if so, click on the pop up menu, and select in "pixels"). Ignore the "Document
Size" for now, that is helpful for printing your images.
- A normal computer monitor is 800 pixels wide by 600 pixels tall. We
want our image to fill the screen, but not so big it takes over the whole
window. Let's make it about 600 pixels wide.
- Make sure the "Constrain Proportions" box is checked. Change the
size of the image to be 600 pixels wide. Notice the height automatically
changes to match. This way, your image won't get stretched. (Thanks to that
constrain proportions box...).
- Click OK. Notice that the image is smaller. Remember, you can still
use the magnifying tool to zoom in and look closer if you want to.
Save the Image to use on
a Web Page
We're going to save the image twice... once for use in future tutorials,
and once for the web. What is the difference? Web pages need images saved
to a specific format: jpeg or gif.
For future Photoshop work, you will want it as a Photoshop
file:
- First, save it as a Photoshop file for use in the next tutorial.
From the menu, select "File" -> "Save As".
- In the dialog box, rename it "cropped_bermuda".
- Change the Format to "Photoshop (*.PSD,*.PDD)".
- Click "Save".
Now, save it for the web: screen shot save for web.
- From the Menu, select "File" -> "Save for Web".
- Elements does a wonderful thing. It shows you the original image (on
the top) and what it will look like compressed for the web. Compression
makes the file download faster, but it is is a trade off... some of the image
quality gets lost. GIF and JPEG formats work in slightly different ways.
Generally, JPEG is better for photos. Play with the settings on the right,
until you are happy. We used JPEG Maximum.
- You can leave the name the same. You should have two files: one named
"cropped_bermuda.PSD" and one named "cropped_bermuda.jpg". The "cropped_bermuda.PSD"
image is a higher quality image, but the "cropped_bermuda.jpg" image can
go on a web page.
You are good to go! You might want to continue with this image in the next tutorial. If you have some extra time,
explore the Extension activities below to learn more.
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| Image size v. file size: these words
are used a lot. Generally, image size is the physical width and height
measurement of the image. File size is the memory size, or how much
space it takes to be stored on your hard drive or disk. When your image size
is smaller, there is less data to keep track of, so the file size is smaller
as well.
Image size can be a tricky thing to understand. If you are
really interested in learning more, look at the tutorial on Resolution. Also,
try changing the image size to be bigger or smaller, save for web, then open
in a web browser. You can get a feel of how big a 250 pixel wide image is
versus an image that is 100 pixels wide.
When saving for the web, experiment with file format settings.
Try saving as a GIF 32 no dither... what
happens? How do the other settings change the image.
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