LECTURE: Understanding file format

EVERYTHING in the internet in a compressed file: movies on Netflix, mp3, videos etc.

File formats in digital media

• All computer documents or files are made in different formats
• Depending what program you use can be  made into a fie
• Graphic files like photos are made like compression format so they can be streamed into the internet

Lossy vs Lossles

• All compression formats will fall into one of the two categories
• Lossy reduces the image quality or the video and makes it low quality. Losses your data.
• Lossless makes your file in more universally readable and tries to keep quality right. Use lossless if you want better quality so its easier.

Graphic Formats

• TIF, JPG,GIF are the most common formats 

1. GIF-graphic interchange format
2. TIF- Tag image format
3. JPG-Photographer expert group

• PNG is a common web format and is high quality and contains an alpha channel
• Each format has its advantages

TIF

• Common format for desktop publishing
• is lossless file format 
• not fit for display over the internet

JPG

• created for  digital photography and works best for photo content
• is a LOSSY 
•  can reduce image quality size 10:1without showing significant compression
• the level of comparison is adjustable
• GIF is the choice to export a photo like cartoons and graphics
• Don't save cartoons as JPG

GIF

• best for graphic images that have flat color 
• reduces image by indexing color
• is adjustable to changing color bit levels
• Contains no DPI data for printing.