# PowerPoint Presentation

Document Sample

```					Graphics - Bitmaps and Vectors
By Markelos Harinos excellent work A*
Bitmap Images                           |          Vector Images

Bitmap images are made up of pixels in a           Vector graphics are made up of many
grid. Pixels are picture elements; tiny dots of    individual objects. Each of these objects can be
individual color that make up what you see on      defined by mathematical statements and has
your screen. All these tiny dots of color come     individual properties assigned to it such as
together to form the images you see. Because       color, fill, and outline. Vector graphics are
bitmaps are resolution dependent, it's difficult   resolution independent because they can be
to increase or decrease their size without         output to the highest quality at any scale. When
sacrificing a degree of image quality. When        you zoom in on the image, the edges of the text
you reduce the size of a bitmap image through      are always crisp and sharp at any scale. This is
your software's resize command, you must           why vector images are called resolution
throw away pixels. When you increase the           independent.
size of a bitmap image through your
software's resample or resize command, the
software has to create new pixels. When
creating pixels, the software must estimate the
color values of the new pixels based on the
surrounding pixels.
Uses of Bitmap and Vector Images
Bitmap Images﻿ They are usually photos, generally with high resolution,
-->
due to resolution problems when resizing. Scanned images, Black and White
images, Grayscale Images, Multitones and coloured pictures are all examples
of regular bitmap images.

Vector Images﻿ These are usually logos and graphics designs, they can
-->
be resized easily without losing any resolution. Maps, shapes, graphs and
complex images are all examples of vector graphics.
The Differences between Bitmap and
Vector Graphics
Vector Graphics and Bitmap Images represent two different
methods for storing and displaying graphic images digitally. A
computer monitor displays a "picture" using a sort of bitmap, in
which the bits are the individual pixels on the screen which our
eye sees not as dots but as a whole image. Vector graphics use
math to describe the image and tell a computer how to use the
math to generate the image. Vector graphics are really x-y plots
with lots of points plotted. Bitmap files can be very large,
depending on the resolution chosen (high resolution = many bits
= big file), whereas vector-graphic files are very compact.

```
DOCUMENT INFO
Shared By:
Categories:
Tags:
Stats:
 views: 0 posted: 9/11/2012 language: simple pages: 4
How are you planning on using Docstoc?