The bits of each color used in the image are inverted. Convert the source color image to a monochrome bitmap. All colors falling below the average color intensity are mapped to black. Others are mapped to white. Convert the source color image to a halftoned monchrome bitmap.
Resolution is maintained by increasing the size of the image by a factor of four on both axes.
Convert the source color image to a dithered monochrome bitmap. This is like halftoning, but resolution is sacrificed to keep the resulting image the same size as the original. The matrix dithering algorithm used with this option is most suitable for line-drawings and text. For more complex graphics the - dither option is recommended. Convert the source color image to a dithered monochrome bitmap with the Floyd-Steinberg algorithm.