Graphics - File Formats

Question 1

TIFF lossless

Answer 1

used to store raster images. commonly used to exchange raster images between application programs. typically uncompressed

Question 2

TIFF lossless advantages

Answer 2

keeping high quality
o easy to resize
o high compatibility
o flexible and compressible

Question 3

TIFF lossless disadvantages

Answer 3

has a very large file size therefore slower to load, process and transfer

Question 4

BMP lossless

Answer 4

raster graphics. used to store bitmap images

Question 5

BMP lossless advantages

Answer 5

pixel values modified individually
o recognised by many platforms = high level of
o compatibility
o usually lossless compression o higher quality than JPEG

Question 6

BMP lossless disadvantages

Answer 6

does not resize very well
o large file size
o uncompression process slows
reading time

Question 7

PCX lossless

Answer 7

an image file format (file extension) first developed for PC Paintbrush

Question 8

PCX lossless advantages

Answer 8

data stays close to the original format (maintaining resolution and clarity)

Question 9

PCX lossless disadvantage

Answer 9

uncommon file format and not widely used. may not be compatible with many platforms and devices
o limited colours

Question 10

JPEG lossy

Answer 10

a camera compressed format. commonly used method of lossy compression can specify

Question 11

JPEG lossy advantages

Answer 11

common file format - many people use it
o higher resolution
o small file size for easy transport
and storage – can be easily transferred through the internet, keeps quality (to a certain extent
o high colour range (but colours reduce and blur when compressed)
o compatible and versatile, working on a variety of different platforms
o small file format (due to reducing and compression) allows for faster transfer of images
o high resolution - keeps image quality relatively
o well
o small file size (compared to BMP
or PNG)
o no editing required to print
most convenient for transmission of compressed images on the Internet

Question 12

JPEG lossy disadvantage

Answer 12

can lose resolution
o lossy file format – loses
o Quality in detail and colour range

Question 13

GIF lossless

Answer 13

a graphic file that is reduced to 256 colours and tones. GIF can be animated
A bitmap file format that can be used to make ‘digital flipbook animations’

Question 14

GIF lossless advantages

Answer 14

second most common file format on the internet - compatible with a range of platforms
o portability between many applications and operating systems
o lossless compression because of the smaller file size, GIFS can be animated (several images combined in one file)
o due to smaller storage can be transferred easily through the internet, downloaded, webpage loads quicker

Question 15

GIF lossless disadvantage

Answer 15

less colours, less compression o less detail due to limited colour
range

Question 16

PNG lossless

Answer 16

raster file format. Portable network graphic format.

Question 17

PNG lossless advantages

Answer 17

supports lossless data compression - keeps quality and detail
smaller file size
o supports transparency in layers, allowing for a variety of features. EG: images can be placed over each other
o supports palette-based images as well as grayscale images
o good for editing and makes image clearer that other format
o lossless
o transparent layers
o can be edited in different layers
- makes it easier to edit the file, useful for both web design and editing in programs
o small file size - easy to store & share
o can be used in network design to create transparent or semi- transparent backgrounds

Question 18

PNG lossless disadvantage

Answer 18

larger image size requires more storage space

o slower to transfer, can slow down the loading of a webpage