06 Compression

What is an advantage of lossless compression?

• The original file can be fully restored.

• The original file size stays the same.

• All of the data in the original file is lost.

• Only the important data from the original file is kept.

Why is data compression important for images? Select all that apply.

• Images on websites will load faster.

• Images will take up less space in storage.

• Compressed images will always look better.

• Uncompressed images won't open on a computer.

Which type of compression is usually used for large multimedia files such as images, sound and video?

• Lossy Compression
• Lossless Compression

Which type of compression can only be used on text files?

• Run Length Encoding
• Huffman Coding

Which type of compression replaces repeating pixels or bit patters?

• Run Length Encoding
• Huffman Coding

Is Run Length Encoding a type of lossy or lossless compression?

• Lossy Compression
• Lossless Compression

What would the first line of this image be in Run Length Encoding?

• 30 11

• 40 11

• 31 10

• 11 30

What would all of the lines of this image be in Run Length Encoding?

• 30 41 40 51

• 40 11 31 10 30 11 51

• 70 91

• 0001 1110 0001 1111

Is Huffman Coding a type of lossy or lossless compression?

• Lossy Compression
• Lossless Compression

Huffman trees use the _______________ of each character to work out their encoding.

• ...frequency...

• ...order in ASCII...

• ...number value...

• ...order of first appearance...