Color Image Halftoning
Vishal Monga, Niranjan Damera-Venkata, and Brian L. Evans

7.1 Introduction ...............................................................................................................
7.2 Screening ..................................................................................................................
      7.2.1 Classification of Screening Methods ............................................................................
      7.2.2 Heuristic Stochastic Screen Design .............................................................................
      7.2.3 Halftone Statistics and Optimum AM–FM Screens .............................................................
      7.2.4 Optimum Donut Filters ...........................................................................................
               7.2.4.1 Optimum AM–FM Monochrome Screen Design .......................................................
               7.2.4.2 Optimum AM–FM Color Screen Design ................................................................
7.3 Error Diffusion ...........................................................................................................
      7.3.1 Grayscale Error Diffusion ........................................................................................
               7.3.1.1 Enhancements to Grayscale Error Diffusion .........................................................
      7.3.2 Color Error Diffusion .............................................................................................
               7.3.2.1 Separable Methods ......................................................................................
               7.3.2.2 Colorimetric Quantization in Error Diffusion ........................................................
               7.3.2.3 Vector Quantization but Separable Filtering .........................................................
               7.3.2.4 Vector Error Diffusion ..................................................................................
               7.3.2.5 Illustrations ..............................................................................................
7.4 Iterative Approaches to Color Halftoning .............................................................................
      7.4.1 Color Direct Binary Search ......................................................................................
      7.4.2 Training-Based Halftone Structures via Iterative Methods .................................................
               7.4.2.1 Color FM Screen Design Using DBS ....................................................................
               7.4.2.2 Tone-Dependent Error Diffusion ......................................................................
7.5 Conclusion ................................................................................................................
References ....................................................................................................................