Data Handling Techniques (continued)


Unlike the "asteroid" shown on the previous page which only has 8 pixels per inch, most images have A LOT of data!



On the top is an image of a ringed planet. There are 96 pixels per inch in this full-resolution image.


The image on the bottom has one-quarter of the resolution of the other image. It has 24 pixels per inch.

How different do they look from one another?

Look at the small stars in each image...do they look the same in both images?

Images of planets are made up of squares or "pixels" of data. Each pixel has one piece of information in it even if the original is very complicated.
Have different students draw pictures of a planet in dark sky using either 1, 2 or 3 different colors per planet. Each person should then fold their picture into 8 by 8 squares. Then take a similar blank piece of paper that's already folded into 8 by 8 squares. Color the blank squares with the color most used from the corresponding square of your original artwork, filling the new squares completely with the dominant color.

Do these "copies" look like the originals? Does it depend on the number of colors used? Do "striped" planets translate differently than "spotted" ones?

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Last modified prior to September, 2000 by the Windows Team

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