ERROR-DIFFUSION BASED TEMPORAL DITHERING FOR COLOR DISPLAY DEVICES

摘要

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for displaying high bit-depth images using a hybrid image dithering method that combines aspect of spatial error diffusion and temporal dithering on display devices including display elements that can display multiple primary colors. Various implementations of the hybrid image dithering method includes a temporal dithering method in which the error associated with selecting the primary color for each sub-frame is diffused to the subsequent sub-frame and diffusing any residual error in the last sub-frame spatially to one or more neighboring pixels

主权项

1. An apparatus comprising:
a display device including a plurality of display elements, each display element capable of displaying one of N discrete primary colors in a color space associated with the display device at a given time; and a hardware processor capable of communicating with the display device, the processor capable of processing incoming image data including a plurality of input colors for display by the display device, the image data including a plurality of image pixels, for each image pixel, the processor capable of identifying M primary colors, the M primary colors when temporally dithered producing a color that is perceptually similar to an input color (C) of the image pixel, wherein M represents a number of sub-frames for temporal dithering including a first sub-frame and a last sub-frame, wherein for a given sub-frame, the processor is capable of:
determining in a color space an error that corresponds to a difference in color values between a primary color selected for the given sub-frame and a target color for the given sub-frame, anddiffusing the error to a subsequent sub-frame, and wherein any residual error at the last sub-frame in the color space is spatially diffused to one or more neighboring input image pixels.