Multi-value character (line image) data, characteristic information and half-tone data are stored while the memory is effectively used. Half-tone data is outputted from the attribute separating section 20. Vector pixels or the density data of 5 bits and the characteristic flag of 3 bits are outputted...http://www.google.com.tw/patents/US5862257?utm_source=gb-gplus-share專利 US5862257 - Image processing apparatus and image forming apparatus
