Transcript Chapter 3

21st Century Technology
Painting
Uses Pixels
Quality of image Changes
Drawing
Uses Vectors or Lines
Quality of Image Does NOT
Change
• Programs assign
each pixel to a point
on a grid
• Grid is called a
Raster
• Images are called
Raster Images or
bitmaps
File Extension = 2 to 4 letters after the dot at
the end of a file name
Example: picture.JPG
The letters = a file format
BMP = bitmap
JPG = jay-peg
GIG = Graphics Interchange Format
TIF = Tagged Image File
PNG = Portable Network Graphics
EPS = Encapsulated PostScript
SVG = Scalable Vector Graphics
Large files = long download times
Large files = lots of storage space used
Compression
Lossless
Lossy
Resolution
Resampling
Resizing
Use a web-based image editing software such
as fotoflexer.com to upload and edit a photo.
(You can also use a sample photo provided on the
Web site of the software)
Save the original photo as 3_Apply3_original.
Resize the image to approximately 150 pixels X
200 pixels
Save the edited photo as 3_Apply3_web_based
http://fotoflexer.com/