observes the object through a red filter, a blue filter, and then a green one. Each filter creates a separate image, containing different information. These images are then colored and combined in a process similar to color separations used for printing colored magazine pictures. Refer to the Color Recognition and Colored Shadows activities for more details on how color filters work and how to combine colors.

For Further Research:

  • Transmit and reconstruct the image on the next page. This more advanced picture uses six shades and smaller grid squares.
  • Examine printed copies of drawings made with a computer art program. Notice how the pictures are constructed of individual points. Also notice how the size of the points contributes to the fineness of detail in the picture.
  • Examine pictures drawn on a computer. Use the magnifying tool to move to the maximum magnification possible. Compare the two views.
  • Obtain the Astrophysics Division Slide Set. Project the slides on a screen and examine them closely for details on picture construction. (See page 82.)
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Last modified prior to September, 2000 by the Windows Team

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