1. A method of decreasing aliasing in an electronic image, comprising: estimating an amount of aliasing in a first channel in said electronic image based on luminosity values in a second channel in said electronic image; processing in an image processing system said first channel based on said estimated amount of aliasing to decrease aliasing in said first channel; obtaining raw image data in said first and second channels for said electronic image, said raw image data having missing luminosity values in each of said first and second channels; and calculating in the image processing system said missing luminosity values in each of said first and second channels using an interpolation function for each of said first and second channels, wherein said estimating comprises calculating a difference between luminosity values in said second channel obtained from said interpolation function for said second channel and luminosity values in said second channel obtained from said interpolation function for said first channel, and wherein said luminosity values in said second channel obtained from said interpolation function for said first channel are obtained by passing fully populated image data for said second channel through said interpolation function for said first channel, wherein said fully populated image data have no missing luminosity values.