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Image Compression and Quality

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Questions and Answers

What is the main difference between how PNG and TIFF store images?

PNG uses no compression at all, while TIFF does

PNG looks for patterns in the image to compress file size, while TIFF does not (correct)

PNG is exclusively lossless while TIFF can be lossy or lossless

PNG uses LZW compression while TIFF does not

What is the maximum number of colors that PNG can create a table of?

256 (correct)

65,536

4,096

16 million

What is the maximum number of colors that can be exactly rendered by GIF?

256 (correct)

1000

512

1024

What is the characteristic of the compression used in PNG?

It is exactly reversible and does not reduce image quality Signup and view all the answers

What is the primary method of compression used by GIF for images with many colors?

Reducing the number of bits needed per pixel Signup and view all the answers

What is the type of images that JPG is optimized for?

Photographs and similar continuous tone images Signup and view all the answers

What is the significance of the 24-bit color in JPG compression?

It stores information as 24-bit color Signup and view all the answers

How does GIF achieve compression for images with many colors?

By reducing the number of colors and replacing commonly occurring patterns with abbreviations Signup and view all the answers

What is the primary advantage of using RAW image format?

It is a lossless format that preserves image quality. Signup and view all the answers

What is the unique feature of JPG compression?

The degree of compression is adjustable Signup and view all the answers

What is the purpose of using proprietary formats like PSD and PSP?

To retain all the editing power of the programs. Signup and view all the answers

What is the disadvantage of using BMP format?

There is really no reason to ever use this format. Signup and view all the answers

What is the purpose of using compression in photographic images?

To balance image quality and file size. Signup and view all the answers

Why may you need to use the manufacturer's software to view RAW images?

Because there is a different RAW format for each manufacturer. Signup and view all the answers

What is the advantage of using better graphics programs like Paintshop Pro and Photoshop?

They allow you to view the image quality and file size as a function of compression level. Signup and view all the answers