Digital halftoning
Digital color halftoning with generalized error diffusion and multichannel green-noise masks
IEEE Transactions on Image Processing
Look-up-table based halftoning algorithm
IEEE Transactions on Image Processing
IEEE Transactions on Image Processing
Electrophotographic process embedded in direct binary search
IEEE Transactions on Image Processing
Impact of HVS models on model-based halftoning
IEEE Transactions on Image Processing
Tone-dependent error diffusion
IEEE Transactions on Image Processing
Inkjet printer model-based halftoning
IEEE Transactions on Image Processing
Model-based color halftoning using direct binary search
IEEE Transactions on Image Processing
Generating Stochastic Dispersed and Periodic Clustered Textures Using a Composite Hybrid Screen
IEEE Transactions on Image Processing
Journal of Visual Communication and Image Representation
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The hybrid screen is a halftoning method that generates stochastic dispersed dot textures in highlights and periodic clustered dot textures in midtones. Each tone level is sequentially designed from highlight to midtone by applying an iterative halftoning algorithm such as direct binary search (DBS). By allowing random seeding followed by swap-only DBS in a predefined core region within each microcell, each level can be designed while satisfying the stacking constraint and guaranteeing a smooth transition between levels. This paper describes a complete design process for the hybrid screen, introduces a number of enhancements to the original hybrid screen, and evaluates their impact on print quality. These enhancements include a multilevel screen design based on either extending a bilevel screen or directly generating a multilevel screen on a high resolution grid, and extending the hybrid screen design procedure to color by jointly optimizing the color screens using color DBS. For the multilevel screen, we show that the best choice for the core size critically depends on the bit depth and screen frequency. For the color hybrid screen, we demonstrate a significant improvement in the highlights over halftones generated by independently designed screens.