1. In a method for converting a graphics image into data representing the intensity values of the image pixels in binary format as either of two extreme values, e.g., black and white, as well as intermediate intensity values between said two extreme values, e.g., grays, to achieve efficient compression, resolution, and coding, the improvement comprising the step of: changing the intensity value of each pixel having an intermediate intensity value within a first predetermined range of said intermediate intensity values to a predetermined one of said extreme intensity values if said pixel is adjacent to a pixel having an intermediate intensity value within a second predetermined range of said intermediate intensity values.