Rendering pipeline for color electrophoretic displays

A plurality of different procedures are used to improve a quality of an RGBW color mosaic image displayed on an electronic paper display, such as an electrophoretic display of an electronic device. By processing lines of an input color image within a pipeline, less memory is required, since intermediate images need not be stored between each successive procedures. The different procedures can include contrast enhancement, color downsampling, saturation boosting, fringe reduction, and dithering to reduce color banding. Fringe reduction is implemented by computing desired and perceived values for each color component of a pixel currently being processed, and desired and perceived values for the luma of an input pixel, and then convolving these values using convolution filters having values selected so that a total color component weight is the same for all of the color filters, thereby preserving color balance in the color image that is to be rendered.