Date: Fri, 25 Aug 2000 20:32:08 +1000 (EST) From: Andy Farkas <andyf@speednet.com.au> To: Lyntal@aol.com Cc: freebsd-questions@FreeBSD.ORG Subject: Re: bitmap? Message-ID: <Pine.BSF.4.21.0008252015360.14504-100000@backup.af.speednet.com.au> In-Reply-To: <40.866cd.26d65d8f@aol.com>
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On Thu, 24 Aug 2000 Lyntal@aol.com wrote:
> What would be the easiest way to explain the idea of bitmap to my middle
> school computer students?
> thanks
> Lynn
A museum I went to had a display explaining "resolution". They had 3
same-sized squares with cylinders in them arranged in a square array. The
first one had few large cylinders, the last many small. sort of like:
+---------+ +---------+ +---------+
| O O O | | o o o o | | ....... |
| O O O | | o o o o | | ....... |
| O O O | | o o o o | | ....... |
| O O O | | o o o o | | ....... |
+---------+ +---------+ +---------+
These boxes were about 30x30cm with the first one having about 10x10
cylinders, the last one about 100x100, the idea being to put your hand on
it and make a depression, then view the representation (the high-res one
being the clearest).
Same as those novelty toys where you make a depression in a metalic
surface of blunt pins... I'm having trouble explaining it...
Perhaps you could explain to them that the boxes above can be represented
as a bitmap to store an image using the above concept... if I've explained
it any good.
--
:{ andyf@speednet.com.au
Andy Farkas
System Administrator
Speednet Communications
http://www.speednet.com.au/
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