Using Fireworks for Image Manipulation
What is the difference between bitmapped and vector? Bitmapped (raster) image
The most common type. An image whose raw information contains information about the
colour of each and every pixel. Usually the larger the
display size, the larger the file size. A disadvantage of a
bitmapped image is when you zoom in, the image gets
chunky looking. The
filename extension of a bitmapped
type is usually PSP, BMP, TIF, JPG,
With bitmapped (or, raster) graphics, you store the
colour for each pixel of the image. Imagine a piece of
graph paper with very small grid squares. Doing
bitmaps is like making a picture by colouring each
square individually, one colour per square.
The advantages of bitmaps are that you can make
and edit much more detailed images, since you can control each pixel, and that
restoring an image from disk requires very little computation (nowadays you have
to uncompress the image, but once the pixels have been reconstructed very little
math processing is required to draw the image).
Contains information for another application to recreate the image from a set of
instructions (turn left here, draw a circle, make this area red). Can be displayed or
printed at any size and not get pixelated (chunky). File size is dependent on the number
of instructions needed to recreate the output. Advantage, great for creating and printing
logos, clipart, lettering and such, can be resized and keep the sharp edges.
Disadvantage, does not recreate a photographic type image. Common filename
extensions are PSP, EPS, PS, WMF, CDR.
The advantages of vector objects are that generally they require less storage than
bitmaps (especially for fairly simple drawings), you can scale and rotate them with
very little loss of detail, and you can manipulate each object separately, even
when on the same layer.
It is often necessary to transfer data from one application to another. A picture may be captured and
edited using a specialised photo-editing application and then imported into a word-processed
document. This can only happen if the photo editor and the word processor application share a
common format for storing the picture data.
Even greater problems could arise if files are being transferred from one computer to another
because the two computers might be running completely different applications. Since this is a
common problem, a number of standard file formats have been created. These formats will be
understood by the relevant applications software.
The format that a file is stored in is usually indicated (in the Windows Operating System) by a three-
letter extension that is placed after the filename. The table below lists some common file formats for
the various types of data that applications use.
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File type Extensio Description
The basic text format stores the characters that
make up the document. No data about the
layout or fonts is stored. It can be read by any
Text word processor or text editing application
Stores additional data about fonts and layout.
Rich Text RTF This type of file can be read by most word
MPEG stand for Moving Pictures Expert Group.
This file format stores compressed sound data.
MPEG – 1 It is used to distribute sound tracks from CD's
Audio layer 3 and other recorded sound. MP3 files can be
read and played by a variety of specialised
This sound format was developed my Microsoft
for use in the Windows operating system. The
different sounds produced by Windows are
stored as wav files.
Strictly speaking a bitmap image file uses one
binary digit to represent one point on an image
as either black or white. It can therefore
represent monochrome images only. In practice
the bmp format represents coloured images by
using more than one bit to store data about the
point on the image. Bitmap images are not
compressed and so picture files can be very
large. This file format is readable by most
This is a compressed file format used for
storing picture data. This format is useful for
storing photographic images but does not work
JPG well for black and white images or drawings. It
is commonly used to store pictures on web
sites and is readable by most photo-editing
Used, like JPEG files to store image data in a
This type of file is actually a text file. It uses a
special language to describe the layout of a
Other HTM web page. HTML files can be understood by
web browsers which will display the file as a
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This is also a text file. A CSV file consists of
records that can be input directly into almost
any database application. Each line of the file
represents a single record and the individual
field values are separated by commas – hence
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