The Benefits of Frequency Modulation Screening

In a previous project the different algorithms for frequency modulation (FM) screening have been compared and analyzed. Several algorithms were found to give on low-resolution output devices a similar image quality as conventional halftone images on high-resolution systems. The present project had the aim to apply these algorithms to B&W images on laser printers with 300 and 600 dpi and to four color printing. The results confirm that FM screening is able to replace conventional screening, especially if low-resolution output systems are being used. A computer program was written to apply FM screening algorithms to Macintosh computers.