The arrow is a link to the last slide, which is a picture of a lily. A portion of the center of the lily is enlarged in the top right corner to show the pixels.
Question: What happens if the image resolution is higher than the monitor resolution? Answer: You will not be able to view the image at its best qualityQuestion: What if the printer resolution is lower than the image resolution? Answer: Your printed image won’t be the optimum quality. To get the optimum quality you will have to have it printed professionally.
Understanding resolution digital_cameras
Understanding Resolution &
Bald Knob High School
Understanding digital cameras requires that
we know how resolution works.
Resolution is determined by how many pixels
(picture elements) or dpi (dots per inch) are
The image you see is simply a grid of
small squares or circles filled in with color.
The more squares or circles—the sharper the
Resolution is measured
by the number of
horizontal pixels times
the number of vertical
◦ Example: 3072 x 2304
The quality of a picture is measured by its
resolution—how many pixels it has; the
current measurement is megapixels
A megapixel is a grid containing one
million pixels (one million squares of
color)—technically, that is an image with a
resolution of 1024x1024 pixels
With computer graphics, there are three
different resolutions to consider:
◦ the image’s resolution (pixels)
◦ the monitor’s resolution (pixels)
◦ the printer’s resolution (dpi)
The image’s resolution is measured in pixels.
Most cameras allow you to change the resolution
before you take the picture.
The higher the resolution—the clearer the image—
the bigger the file size.
Monitor resolution is measured in horizontal and
◦ Example: 800 x 600
If an image is taken at 1024x768, but your monitor
can only display 800x600—that’s as good as it gets!
Printer resolution is measured in dpi—dots per inch.
The quality of the printed image is going to be
determined by both the resolution of the image AND
the resolution of the printer.
Other points to consider
When purchasing a camera, you should also
research the following specifications:
◦ Storage Capacity
◦ Transferring Images
◦ Power Source
◦ LCD vs. Optical View Finder
LCDs vs ViewFinder
LCD—Pro’s View Finder—Pro’s
◦ Shows you the exact image Uses less battery
that will be recorded
◦ Easy to view … delete Easier to see images in
images, etc. bright light
◦ Displays menu
LCD—Con’s View Finder—Con’s
◦ Drains battery—uses ½ life Shows close approximation
of battery of the final image—not the
◦ Difficult to see in bright light real thing
Difficult for some people to
Optical zoom actually enlarges the image—
measured in X
◦ example: 8X—increases an image 8 times
Digital zoom takes a portion of an image an enlarges
it electronically; the image loses resolution when the
camera enlarges it; also measured in X
Macro allows you to take close-up pictures of
objects that are small and enlarge them so they