Colour edge detector images

This page has links to the images from the paper:

Sangwine, S. J., 'Colour image edge detector based on quaternion convolution', Electronics Letters, 34, (10), May 14 1998, 969-971.

The first image appears to be monochrome at first sight, but on closer inspection, will be found to have coloured edges as described in the paper.

Fig `1
Figure 1

Fig 2
Figure 2

Fig 3
Figure 3

All three files can be downloaded in PNG (portable network graphics) format for viewing in an image viewer if you have one (especially useful for zooming in):
Figure 1 (359kB)
Figure 2 (3kB)
Figure 3 (4kB)

Dr Steve Sangwine
Last updated: 25 January 2001