Algorithm for generating hybrid screen angles using irrational tangent technique

Abstract

Proposes an algorithm of generating screen angle by irrational tangent technique. It is based on rotating data in an image to the required angle. It is found that the algorithm can compensate the lost data in rotated images for accurate results. The code value for proper linkage positions between FM and AM screens should be at 180-200 and the distance for mixing screen at the value of 20-30. In addition, the CMY screen angles in the hybrid zone should be maintained at a difference of 30 degrees as normally used in AM screen. The result shows that the print image obtained from hybrid screen technique is better than that of AM screen in highlight area; and better than that of FM screen based on tone reproduction consideration