define image,raster graphics,vector image,bit level,point,line,polygon,

1. TYPE OF IMAGE
P.Nithya
M.Saranya
M.Surya
P.Vinitha
II M.Sc(CS&IT)
Nadar Saraswathi College Of Arts
And Science ,Theni.

2. IMAGE
The new position of a point, a line, a line segment, or
a figure after a transformation is called its image.
An image is a picture that has been created or copied
and stored in electronic form.

3. TYPE OF IMAGE
There are used in two type of image:
 vector graphics
 raster graphics
An image stored in raster form is
sometimes called a bitmap.
An image map is a file containing
information that associates different locations on
a specified image with hypertext links.

4. RASTER GRAPHICS
In computer graphics a raster
graphics or bitmap image is a dot matrix data structure,
representing a generally rectangular grid of pixels, or
points of color, viewable via a monitor, paper, or other
display medium.
Raster images are stored in image files with varying
formats.

5. A bitmap, a single-bit raster, corresponds bit-for-bit
with an image displayed on a screen, generally in the
same format used for storage in the display's video
memory, or maybe as a device-independent bitmap.
A raster is technically characterized by the width and
height of the image in pixels and by the number of bits
per pixel (or color depth, which determines the number
of colors it can represent).

6. Image storage
Most computer images are stored in raster
graphics formats or compressed variations,
including GIF, JPEG, and PNG, which are
popular on the World Wide Web.
Three-dimensional voxel raster graphics are
employed in video games and are also used in
medical imaging such as MRI scanners.[9]

7. VECTOR GRAPHICS
A vector graphic is a type of image. Vector
images are graphical representations of
mathematical objects such as lines, curves,
polygons and its like.
These graphics are generated by computer
and they follow x and y axis as their reference
definition.

8. Since a vector image is only made up of
mathematical entities, it is possible to easily apply
geometrical transformations to it while a bitmap
image, made up of pixels, will not be able to undergo
such transformations without suffering a loss of
information called distortion.
The appearance of pixels in an image
following a geometrical transformation is
called pixilation .

9. DIFFERENT BETWEEN RASTER AND VECTOR
IMAGE
Vector Image Bitmap Image