Digital Imaging Software. File Formats. MOD003232. 03/02/2014

Digital Imaging Software

File Formats

MOD003232

03/02/2014

9:00-12:00

In today's lesson we learnt about file formats and the advantages and disadvantages of using each type.

Bitmap Graphics

Image constructed of rows and columns of pixels, each pixel records the colour at the place in the image.

*Very large file sizes

Vector Graphics

Shapes stored as coordinates and equations.

*Compact, scaleable and resolution independent

GIF

*Only 256 colours, may lose colours when saving image.

*Provides transparency and interlace options

*Lossless compresses

*Best for graphics with large areas of continuous flat colour

*Provides animation

*Good for presenting text as an image on the web

JPEG

*Millions of colours possible

*Uses a lossy compression

*Loses info every time you save the image

*Not good for sharp edges

PNG

*Useful but not used widely

*Lossless compression

*Smaller file size than GIF

*Inherent gamma control and transparency

TIFF

*Lossless compression

*Allows transparency

*Different types of compression

*Save layers from photoshop

SVG

*2D vector graphics

*Handles animated graphics

*Uses XML with CSS text file to control behaviour

*Good level of browser support

EXR

*Lossless compression

*Multi channel images

*Raster images

*Industrial light and magic