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Дата изменения: Fri Feb 4 20:38:59 2005
Дата индексирования: Mon Oct 1 20:30:31 2012
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Surface highlighting

Figure 1.10: Computer processing allow to increase an image contrast. On the left picture initial image is shown, on the right -- the image that was highlighted. Studying object - bacteria Escherichia Coli. Image size 4,6 $\times$ 4,6 mkm$^2$.

Human's eye differs hi-contrast objects better. That is why small objects are unnoticeable in compare with big ones on the images in which object height is represented by colours. What we can do in this case?

There is a way to combine information about objects height with the information about height of small detail on its surface. Just imagine that you are flying over the the Caucasus mountains. You see all the ravines and canyons, though height overfall they has is significantly smaller than mountains itself. This is due to game of light and shade. If the sun is in zenith, than horizontal parts of the surface will be brighter than the slopes. Our mind is calculating objects height by itself.

Thus, applying this highlight effect to surface image will reveal small details without losing information about the big ones (see pic. 1.10).