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Issue13datarepresentation
Getting To Grips With Data Representation and Graphics

Links to support the article on p10/11 of SwitchedOn Issue 13, outlining a variety of tools to help teach data representation and graphics. Slide show from a supporting talk at CAS Conference 2014 also added.

Roger Davies

Created by Roger Davies
last edited Nov 30 2014 by Roger Davies



Links to support the article on p10/11 of SwitchedOn Issue 13, outlining resources suitable for use at Key Stages 3 to 5, to introduce concepts of graphics and data representation. The slide show was used in a talk at CAS Conference 2014, and contains further ideas and useful links, particularly i relation to JES; using python to implement photoshop type image filters.

The introductory exercises developed by CS Inside can be found here CS Unplugged can be found here and CS4FN can be found here

Neil Kendall’s exercises to create bitmapped graphics from binary numbers is here

GIMP can be downloaded from here

Netpbm is a suite of programming tools to manipulate graphics. More details can be found here The details about file headers and formats in the netpbm file suite, so students can create their own, can be found here

Pixel Spreadsheet can be downloaded from here and includes some excellent introductory videos.

JES can be downloaded from here and further details of the work on media computation by Mark Guzdial and colleagues can be found here

Finally, the excellent book to support work on media computation and JES, written by Mark Guzdial and Barbara Ericson can be purchased from here. There have been several versions so do check you have the latest, if you wish to order.

Added Dec 2014: Although not covered in the article, or presentation, you might want to look at this great utility: http://www.think-maths.co.uk/spreadsheet Developed by Matt Parker’s Think Maths website, it allows you to upload a picture and returns a spreadsheet with the RGB values for each pixel held in contiguous cells. The real beauty of this is the conditional formatting then applied, which represents the cells in the colour of the RGB value. Zoom out and you see the image, zoom in and you see the numerical values. Excellent for seeing the image in the spreadsheet. A good preliminary step before using the Mark Gudzials spreadsheet utility.

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