Abstract: An improved data compaction process for encoding digitized images is disclosed. The process uses four fields of data with field one encoding the number of lines having an identical format, field two encoding the number of bytes having bits of one pre-designated single binary value up to the maximum number which can be defined with the field, field three containing the byte of image points immediately following the last byte encoded by the preceding field, and field four encoding the number of sequential bytes having bits of only the binary value of the last bit of the preceding field of data, up to the maximum number which can be defined with the field. Fields three and four are repeated to encode all points along a line of the digital image. The above process is repeated for each line of the digital image until the entire image has been encoded.