Content-aware halftone image resizing using iterative determination of energy metrics

A method for resizing a digital halftone image, the method comprising:

• receiving into a digital imaging system a digital halftone image and a desired resizing factor for a digital halftone image;
• determining halftone screen parameters for said digital halftone image;
• defining cells within said digital halftone image from said determined halftone screen parameters;
• determining from said cells and halftone cell parameters, a number of halftone tile seams to manipulate, where an orientation of said seams is dictated by said received desired resizing factor;
• determining an energy for each of said seams according to an energy metric so as to provide indication as to which of said low energy seams is sufficient to achieve said desired resizing factor for said digital halftone image;
• iteratively deleting low energy seams to obtain a resized halftone image;
• and,
• printing said resized halftone image on a printer.

A method for resizing a digital halftone image, the method comprising:

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