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Image file formats
1)
2)
3)
4)
5)
6)
What is meant by Image file formats?
Which are the ways that images formats can be stored?
Define the unit of an image.
How are images compressed?
Why are images compressed?
Define a metafile
Fill this table:
File Bits
Maximum Metadata Benefits
type used to colors
(yesNo)
combine
JPG 24
256
Yes
It
compresses
the data to
be very
much
smaller in
the file.
TIF
24-48
25665536
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Yes
It is lossless
so TIF files
have a very
high
quality.
Drawbacks
Photo example
It uses lossy
compression
so the
image loses
its quality.
JPG is more
useful when
small file
size is more
important
than high
quality.
Webpages
cannot
show TIF
files and the
file size is
large.
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PNG 24-48
25665536
Yes
It is lossless
and slightly
more
effective
than TIF.
The file size
is large.
GIF
256
Yes
It is
lossless.
The file size
is smaller
than JPG as
long as the
images
have few
colors.
GIF files are
indexed, so
the format
works
poorly with
images
which have
many colors,
such as
color
photos.
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1) Image file formats are standardized ways of organizing and storing digital images.
2) The most important ones are GIF, JPG and TIF. Other examples are PNG, RAW, BMP and
PSD.
3) It is the format with which the image has been saved.
4) Images are compressed by formatting them into JPG and GIF. JPG is often used for
photographs and GIF for line art and images where geometric forms are not complex.
5) They are compressed so that they occupy less space in the computer’s memory without
having their quality degraded.
6) Metafile is a file format which can store multiple types of data.
Lucila Eccheri
4ºB
Document1