MACROMEDIA FIREWORKS 8, Use Manual

Page: 109 / 472

Adding noise to an image 109
Adding noise to an image
When viewed at high magnification levels, most images obtained from digital cameras and
scanners do not have perfectly uniform colors. Instead, the colors you see consist of pixels of
many different colors. In image editing, “noise” refers to these random color variations in the
pixels that make up an image.
Sometimes, such as when you are pasting part of one image into another, the difference in the
amount of random color variation in the two images can stand out, preventing the images
from blending together smoothly. In such a case, you can add noise to one or both images to
create the illusion that both images come from the same source. You can also add noise to an
image for artistic reasons, for instance, to simulate an old photograph or static on a television
screen.
Original photograph; after adding noise
To add noise to an image:
1. Select the image.
2.
Do one of the following to open the Add Noise dialog box:
■
In the Property inspector, click the Add Live Filters button, and select Noise > Add
Noise from the Filters pop-up menu.
■
Select Filters > Noise > Add Noise.
NO
TE
Applying a filter from the Filters menu is destructive; that is, it cannot be undone
except when Edit > Undo is an option. To maintain the ability to adjust, turn off, or
remove this filter, apply it as a Live Filter, as described in the first bulleted option in
this step. For more information, see
Chapter 8, “Using Live Filters,” on page 193 .