all about file formats mr. butler john jay high school department of technology
TRANSCRIPT
All About File Formats
Mr. Butler
John Jay High School
Department of Technology
Why Study File Formats?
Important to recognize which formats should be used with the appropriate task
Your not wasting your time spending hours working in the wrong file format
Help understand the different file formats and help you choose the right one for each project
Native file formats
Native file formats
When you save a document in the same format as the program you’re working in. Ex. If you save a Photoshop image as a
Photoshop file (instead of as a TIFF of JPEG).
Non-Native file formats
The type of file formats that each software program can create or accept
Sometime you cannot open new files in old programs Ex. Using Microsoft Word XP at school
and trying to open it at home using Microsoft Word 98
Non-Native file formats
Exporting or saving as non-native file formats Export a file or Save As with a different
name and format
Importing and opening non-native file formats Importing – bringing a non-native file into an existing
page of an application May also be called insert, Get Picture, Place
Open – just as if it was its own native format, some programs may just open it!
File Formats that Photoshop can open on a Mac
TIFF files
TIFF files
TIFF is an acronym for Tagged Image File Format
Is a raster (bitmapped) file format Almost every raster program, such as
image editing or paint programs, can save as TIFF’s and can be import TIFF’s
TIFF is also the best format to use between Windows and Macintosh.
Scanning as TIFF
TIFF was originally created for scanning
LZW compression
Compression means the information in the file is squished so the file takes up less disk space.
There are two generic types of compression: Lossy – some data in the files is lost Lossless – no data is lost during compression
LWZ stands for Lempel, Ziv, and Welch (the three creators of compression)
EPS files (vector)
Encapsulated PostScript
DCS files
DCS files
The DCS format is an acronym for Desktop Color Separation
DCS was developed by Quark to allow programs to read CMYK files correctly.
PICT files
PICT files (Macintosh)
PICT is short for “picture” Created by Apple for images on the
first Macintosh systems A PICT file can contain both vector
and raster information
BMP files
BMP files (Windows)
Windows has a BMP format (windows Bitmap)
BMP files are primarily used to create the wallpaper images that fill the background of the Windows screen
WMF files (windows)
The WMF stands for Windows Metafile Is a vector format for use on the
Windows platform Should only be used with multimedia
programs (only when needed)
GIF files
GIF file format
GIF is an acronym for Graphical Interchange Format
Pronounced “gif”, not “jif” because it stands for “graphical”
GIF format can be displayed on any computer
GIF was originally created by CompuServe Online for transferring images online
GIF file format
GIF images are found everywhere on the World Wide Web
GIF image must use the Index color mode, which has a maximum of 256 colors (8-bit)
PNG files
PNG file format
PNG is an acronym for Portable Network Graphic
Pronounced “ping” Similar to GIF PNG files can support 24-bit color
(millions of colors) and transparency without jagged edges
JPEG files
JPEG files
JPEG is an acronym for Joint Photographic Experts Group
Pronounced “jay peg” JPEG is a compression format that
makes images into smaller files JPEG is a lossy compression Many stock photo companies save their
images with JPEG compression
PDF files
PDF files
PDF is an acronym for Portable Document Format
It is a compression scheme that embeds, right within the file
All the necessary information to view a single document is present: Text, images, page breaks, fonts, etc.
Any Questions
Take a moment and finish up any blank questions on your notes sheet.