darwing and representation - tech snippet. raster graphic file formats
DESCRIPTION
A technical lesson explaining and comparing the four most common raster graphic file formats (gif, jpeg, tiff and png) Pixels per inch and dots per inch. Color Depth and Image channels.TRANSCRIPT
Tech SnippetRaster graphics!le formats
Joint PhotographicExperts Group
Graphics Interchange Format
Tagged ImageFile Format
Portable Network Graphics
Gif Jpeg Png Tif
ProprietaryCompuserve
ProprietaryJPEG
Open Format
ProprietaryAdobe
Losslesscompression
Lossycompression
Losslesscompression
Losslesscompression
- Bit colors max
- Bit per channel
- Bit per channel
- Bit per channel
one colortransparency
no alpha layer
alphalayer
multiple layers
web use animation
web usecompression
web usetransparency
general useversatility
Gif
Burón, Javier. Lasso Lamp.
Jpeg
Png with alpha
Tif multilayered
Base
Tif multilayered
Shadows & re&ections
Tif multilayered
Z-depth channel
Tif multilayered
Depth of !eld effect
Tech SnippetResolution
Pixel (picture element) Is the smallest element in a graphic image; it is an abstract element without an speci&c shape or scale.
FOA. Virtual House.
R 158G 123B 000
R 157G 129B 000
R 155G 138B 000
R 151G 137B 000
R 142G 118B 000
R 118G 085B 000
R 147G 173B 000
R 138G 114B 000
R 144G 129B 000
R 134G 121B 000
R 122G 099B 000
R 118G 085B 000
R 104G 072B 000
R 100G 078B 000
R 100G 079B 000
R 087G 065B 000
R 082G 058B 000
R 118G 11B 000
R 066G 034B 004
R 058G 036B 000
R 045G 030B 000
R 037G 027B 000
R 041G 030B 004
R 118G 085B 000
Pixels per inch ppi Is the measure of image resolution. e number of pixel per linear inch.
It establishes the physical scale of an image.
Dots per inch dpi Is the measure of printing resolution. e number of ink dots per linear inch.
It is dependant of the printing technology
Computer Screens 72ppi–150ppi
Desktop printing 150ppi–300ppi
Press printing 90ppi–300ppi
Tech SnippetColor depth
Color depth Is the number of bits used to represent the color of a single pixel in a image. e maximun number of different colors that
an image can have
-bit color (¹ = colors) monochrome
-bit color (⁸ = colors) gray scale
-bit color (²⁴ = ,, colors) truecolor
-bit color -bit floating point data High Dynamic Range Images
High Dynamic Range Images Low Exposure
High Dynamic Range Images Medium Exposure
High Dynamic Range Images High Exposure
Channels Is a layer of an image that stores each color component or transparency information
Red Green Blue Alpha
