non-photorealistic rendering co-occurs with 35 other keywords:

volume rendering 6x flow visualization 2x illustration 2x visualization 2x 3d texture mapping 1x consumer graphics hardware 1x convolution-based differentiation 1x curvature 1x descriptors 1x flowline curvature 1x hand-drawn 1x hatching 1x illustrative rendering 1x implicit surface curvature 1x indirect volume rendering 1x interactive volume illustration 1x lighting model 1x medical imaging 1x pen-and-ink rendering 1x perceptual enhancement 1x photographic techniques 1x saliency 1x scientific visualization 1x segmentation 1x shading 1x shading language 1x shape matching 1x sketch 1x stylized rendering 1x surface processing 1x time-varying data 1x transparency 1x uncertainty 1x uncertainty visualization 1x visual attention 1x