Content-aware resizing of uniform rosette color halftone images

A method for resizing a digital uniform rosette halftone image composed of multiple colorant separations, the method comprising:

• receiving into a digital imaging system, a digital uniform rosette halftone image and a desired resizing factor for the digital uniform rosette halftone image;
• determining uniform rosette halftone screen parameters for the digital uniform rosette halftone image;
• defining uniform rosette cells within the digital uniform rosette halftone image from the determined uniform rosette halftone screen parameters;
• determining from the defined uniform rosette cells and the uniform rosette halftone cell parameters, a number of uniform rosette halftone tile seams to manipulate, where the orientation of the uniform rosette halftone tile seams is dictated by the received desired resizing factor;
• determining an energy map of the digital uniform rosette halftone image according to an energy metric derived from the multiple colorant separations;
• determining an energy for each of the uniform rosette halftone tile seams within the energy map so as to provide indication as to which of the uniform rosette halftone tile seam have low energy;
• resizing of the uniform rosette halftone image by manipulating the low energy uniform rosette halftone tile seams to obtain a resized uniform rosette halftone image;
• and
• printing the resized uniform rosette halftone image on a printer.

A method for resizing a digital uniform rosette halftone image composed of multiple colorant separations, the method comprising:

• receiving into a digital imaging system, a digital uniform rosette halftone image and a desired resizing factor for the digital uniform rosette halftone image;
• defining uniform rosette cells within the digital uniform rosette halftone image;
• determining from the defined uniform rosette cells, a number of uniform rosette halftone tile seams to manipulate, where the orientation of the number of uniform rosette halftone tile seams is dictated by the received desired resizing factor;
• descreening each colorant separation of the digital uniform rosette halftone image to provide descreened pixel values;
• determining an energy metric from the descreened pixel values to provide an energy map;
• determining the energy of the number of uniform rosette halftone tile seams according to an energy map so as to indicate of a number of low energy determined uniform rosette halftone tile seams, the number at least sufficient to achieve the desired resizing factor for the digital uniform rosette halftone image;
• resizing of the uniform rosette halftone image by manipulating the number of low energy determined uniform rosette halftone tile seams to obtain a uniform rosette resized halftone image;
• and
• printing the resized uniform rosette halftone image on a printer.