|
What are pixels?
When
you take hold of a digital camera, or even a traditional one, you constantly
read or hear about "pixels". "This digital camera has 8.0 megapixels."
"This one has 6.5 megapixels." So what are pixels exactly?
According
to My Design Primer, PIXEL came from
the first letters of "pix element"- pix meaning picture. It is the
smallest unit on a display screen or monitor. By dividing the monitor into rows
and columns of pixels, one may be able to see the pictures displayed on the
monitors. The more pixels are squeezed into a monitor's surface, the smoother
an image will appear on screen. They will appear like they're connected to your
eye because pixels are usually so close together. A monitor with more pixels
per inch (PPI) will be more expensive than a cheaper one.
The
number of bits used to display each pixel determines how many colors a pixel
can display. For example, a color monitor uses 8 bits per pixel in an 8-bit
color mode. This makes possible the display of 256 (or 2 to the 8th
power) colors on screen. Each pixel in a color monitor is made up of dots- red,
blue, and green (RGB). These three dots are focused on the same spot when you
look at it, creating a very smooth image. The quality of a monitor depends on
its resolution. It indicates how many pixels it can display in a given area, as
well as how many bits are contained in each pixel.
How to remove the
red-eye in pictures
Somewhere
somehow, red eyes seem to attach itself to our photographs. This makes our
friends and loved ones look like the version of the Exorcist. To avoid the red
eye from haunting us, Fireworks MX 2004 has a tool for removing this effect on
photos.
The
Red-eye Removal tool works by removing all the shades of red within a certain
range that are within the selected area. These, in turn, will be replaced by a
neutral color range of gray and black.
To remove
the red-eye effect, Macromedia has provided the following steps for the Red-eye
Removal tool:
1.
Select the bitmap that exhibits the red eye effect. You can
only use the Red-eye Removal tool on a bitmap, and not on a vector image.
2. Choose the Red-eye Removal tool from
the Tools panel. This tool can be found in the Replace Color tool pop-up menu.
3. Click with the tool in the section
that exhibits the red eye effect. The tool instantly transforms the red shades,
to the tolerances set in the Property inspector for the tool.
4. Since the tool only
looks for red pixels, it should cleanly remove the red eye. Adjust the
tolerance settings to fine tune the Red-eye Removal tool for your image.
|
