Transcript Bitmap vs. Vector

Objective 1
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Also known as raster images.
Made up of pixels in a grid.
 Pixels: tiny dots of individual color that makes up
what you see on your screen. Tiny dots come
together in the form of the images you see.
 When the image is enlarged, you can see each
individual square dot of color.
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Bitmap images are resolution dependent.
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Resolution: # of pixels in an image.
Stated in:
Dpi (dots per image)
Ppi (pixels per image)
Its difficult to increase or decrease the size of an
image without sacrificing a degree of image
quality.
 Reducing the image: throws away pixels.
 Increasing the image: creates new pixels.
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.bmg
.gif
.jpg
.tiff
.psd
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Microsoft Paint
Adobe Photoshop
Corel Photo-Paint
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All scanned images are bitmap
Digital camera images are bitmap
Images can be converted from one format to
another.
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Made up of many individual, scalable objects.
Objects indentified by mathematical
equations rather than pixels.
Always render the highest quality.
Objects consist of:
 Lines
 Curves
 Shapes with editable attributes: such as color, fill,
and outlines.
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Changing the attributes of a vector object
does not affect the object itself.
Freely change any # of object attributes
without destroying the basic object.
Vector images are resolution independent.
Increase or decrease the size to any degree
and your lines will remain crisp and sharp on
screen and print.
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Fonts are a type of vector object.
Vector images are not restricted to a
rectangular shape like bitmap images.
Disadvantage of vector images: unsuitable
for producing photo-realistic imagery.
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AI (Adobe Illustrator)
CDR
CMX
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Adobe Illustrator
CorelDRAW
Xara Xtreme
Serif DrawPlus
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Image editors (pixel/bitmap based)
Illustration software (vector-based)
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Most popular type of graphics software
Also known as paint applications
Allows you to create bitmap-based images from
scratch using a variety of painting tools intended
to mimic natural painting tools.
Most image editors include features for photo
enhancement and retouching
Advantage: you can get a great deal of detail, as
much as a photograph.
Disadvantage: confined by the pixel resolution
of the image.
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Because they consist of points and objects
rather than pixels on a grid, they are free
from the confines of pixel resolution.
Cannot contain the high level of detail as
bitmapped images so they often have a
cartoon-like appearance.
Most often used to create stylized, cartoonlike images, logos, maps, and other design
elements that need to be output at any size.