Image Processing Reference
Fig. 11.2 Three different gray-level mappings
Fig. 11.3 Inverting an image
Fig. 11.4 Solarize filter
11.1.1 Point Processing
The simplest way to create visual effects is to play around with the gray-level map-
ping. Two classic gray-level mappings are illustrated in Fig. 11.2 and the visual
effects of these mappings are illustrated in Figs. 11.3 and 11.4 .