Method of generating multiplexed image for printing based on color values gamut-mapped to inside maximum volume hyperrectangle

A method of generating a multiplexed image for printing that can be observed in a plurality of modes and can be printed using a laser marking apparatus, the method comprising:

• receiving a plurality of input images;
• combining the plurality of input images to form a multiplexed input image;
• retrieving a multiplexed palette from a memory, the multiplexed palette including a plurality of images that can be printed on a substrate surface by varying one or more parameters of the laser marking apparatus, each image being observable in the plurality of modes and having a plurality of color values corresponding to the plurality of modes;
• determining a finite shape of the multiplexed palette in a combined color space based on the color values of the plurality of images;
• determining a maximum volume hyperrectangle enclosed in the finite shape of the multiplexed palette;
• performing gamut mapping to map color values of the multiplexed input image to color values inside the maximum volume hyperrectangle;
• and
• obtaining the multiplexed image for printing based on the gamut-mapped color values of the multiplexed input image.