DIP Lecture 20: Dithering and halftoning

ECSE-4540 Intro to Digital Image Processing Rich Radke, Rensselaer Polytechnic Institute Lecture 20: Dithering and halftoning (4/20/15) 0:00:03 How are grayscale images printed in newspapers and books? 0:02:16 Why not just threshold the image? 0:05:09 Dithering 0:06:58 Matlab examples 0:12:12 Halftoning 0:15:14 Digital halftoning with a tiled array 0:16:48 An example array 0:21:07 Matlab examples 0:23:48 Perceptual considerations 0:25:44 Color halftoning with arrays at different angles 0:28:27 Another halftone array 0:32:34 Error-diffusion dithering 0:34:02 Floyd-Steinberg dithering 0:37:02 Paper-and-pencil example 0:39:52 Matlab examples 0:42:35 Computer graphics approaches to non-photorealistic rendering 0:44:00 Wall Street Journal portraits 0:44:41 Digital engraving 0:46:26 Coherent line drawing 0:47:24 Pen-and-ink illustration