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Teacher / parent notes
IT in context
programs use pictures made from pixels.
first picture shows an enlarged version of a small area of a picture
taken at an event in Scotland. the pixels are visible as squares
of different colours. With the right tools each pixel or group of
pixels can be changed.
second picture is enlarged, though less than the first. Now we see
more clearly that it is the Scottish (St Andrew's) flag. The pixels
still make this enlargement rather ragged, as if made from blocks.
next picture is of the whole original photograph. You can see the
Scottish flag in the background at normal size.
that there is a loudspeaker in the background which appears to come
from the man's head. The blue screen in the foreground is distracting
to the eye and another person sitting next to the man makes the
shape of the back of his head unclear
however "clean up" the photograph by deleting the pieces
we don't want and replacing them with pieces from the rest of the
final photograph you can see the blue screen has been replaced by
pieces of grass copied from the grass in the foreground. The loudspeaker
has been deleted and replaced with cloud and sky and the second person
has been replaced by pieces of background.
may produce a more attractive picture, but it could lead very easily to
dishonesty and could mislead the viewer.
software has specialist semi-automatic tools for deleting "red eye"
caused by flash guns, or deleting spots and stains on old sepia photographs.
This certainly enhances the original. However deleting a person from a
photograph could be deliberately changing the truth.
and moving people in a picture was frequently done in the USSR to persuade
viewers of a different "truth." It has also been done in recent
times by UK national newspapers.
or misleading? | Draw | Paint