ABSTRACT
Image processing on the GPU, particularly real-time post-processing, is an important aspect of modern graphical applications, and has wide and varied uses from games to user interfaces. Because of the continually improved performance levels of graphics hardware, post-processing effects are now common on the desktop and in the console space. With the current generation of OpenGL ES 2.0-enabled embedded GPUs, an increasing number of such effects are also possible on mobile devices. Bloom effects, for example, can add a vivid glow to a scene; color transforms and distortions can provide a stylistic flair; blur, and depth-of-field effects can draw attention to areas of interest, or highlight selected elements in a user interface. Figure 2.1 shows some generic examples of post-processing effects, and Figure 2.2 demonstrates the use of a blur effect in a user interface.
