Since the pixels would be stretched to cover much more screen space, the image would end up looking
very “rough” (a phenomenon known as “pixilation”). The images below illustrate this idea:
The same image, four times larger and with only 1/4 the resolution of the original.
See the difference?
So when inserting images from Photoshop into another application, don’t think you can just grab an image and
stretch it to an infinitely large size. You’ll lose resolution when you do, and the image will look bad. The same goes
for resizing in Photoshop: Photoshop can’t add pixels to an image to increase its resolution.
Working with images
Now the fun stuff.
We are going to introduce you to basic image editing in Photoshop by posing a problem: If you had to
convince the city of Seattle that planting trees along a street would improve its appearance, and if you
had to use Photoshop to do this, what would you do?
Well, you might start by taking photographs of the street; you might also take photos of trees you
wanted to use on the street, or else find these in a magazine or book.
Next, you would make a digital copy of these photos by scanning them. Using Photoshop, you could cut-
and –paste a few big leafy trees into the streetscape containing none to illustrate what this street would
be like if trees were planted.
To do this, you would decide which trees to paste, and then you would select them: you would outline
everything you wanted to copy-trunk, branches, leaves, even shadows if you so desired.
After your tree was adequately selected, you would make a copy of it and paste it into the second
image. Finally, you would use a variety of tools to edit and manipulate the tree in order to “blend” it
into the new scene.
So there are three basic steps to this process:
. Select a tree
. copy it and paste it
. edit and manipulate it
This selection will show you how to do this.