This paper presents two halftoning methods to improve efficiency in generating structurally similar halftone images using Structure Similarity Index Measurement (SSIM). Proposed Method I reduces the pixel evaluation area by applying pixel-swapping algorithm within intercorrelated blocks followed by phase block-shifting. The effect of various initial pixel arrangements is also investigated. Proposed Method II further improves efficiency by applying bit-climbing algorithm within intercorrelated blocks of the image. Simulation results show that proposed Method I improves efficiency as well as image quality by using an appropriate initial pixel arrangement. Proposed Method II reaches a better image quality with fewer evaluations than pixel-swapping algorithm used in Method I and the conventional structure aware halftone methods.
KHAN et al. REF proposed two halftoning methods to improve efficiency in generating structurally similar halftone images using Structure Similarity Index Measurement.
Improving the Efficiency in Halftone Image Generation Based on Structure Similarity Index Measurement
IEICE Transactions
IEICE Transactions
Computer Science