Encoding B and W Images

Imagine drawing with zeros and ones. The third lesson in a unit of 15 introduces the class to creating black and white images. Pairs get together to create an encoding scheme in order to make these images. They move on to a using a widget to encode their images before learning about the idea of metadata as it refers to the dimensions of the picture.

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Instructional Ideas

  • For pupils that have a hard time with coding an image from scratch, have them create their image on graph paper first
  • Have pupils share their bits with others to recreate their images by hand on graph paper
Classroom Considerations

  • Review the tutorials in order to understand the coding and the use of the widget

  • A video shows how to use the pixelation widget
  • One of the extensions ties in compression with images

  • None