Patent ID: 8571307

Claim:
A method for representing a monochrome image as binary data, comprising: receiving a frame of monochrome image data, said frame of monochrome image data comprising a plurality of input pixel values corresponding to a plurality of pixel positions in an image, wherein said input pixel values are represented as N-bit values, and wherein N>1; defining a plurality of pixel value ranges, said pixel value ranges comprising a low range, a high range, and at least one intermediate range; assigning each of said input pixel values to one of said pixel value ranges; assigning pixel positions having input pixel values assigned to said low range an output pixel value that is a first binary value; assigning pixel positions having input pixel values assigned to said high range an output pixel value that is a second binary value, wherein said second binary value is different than said first binary value; and assigning pixel positions having input pixel values assigned to said at least one intermediate range output pixel values representative of a spatial binary pattern, wherein said spatial binary pattern assigned to each of said at least one intermediate ranges is different.