Patent ID: 8613491

Claim:
A method for using a handheld printing device to print an image onto a medium, wherein the image is printed onto the medium based on a print head of the handheld printing device being moved in a back and forth motion over the medium, the method comprising: in a first motion, of the back and forth motion, of the print head over a surface of the medium, depositing, via the print head, a substance onto the surface of a medium at a first location on the medium, determining a first tilt value of the print head relative to the surface of the print medium at the first location, and storing the first tilt value of the print head relative to the surface of the print head medium at the first location; and in a second motion, of the back and forth motion, of the print head over the surface of the medium, determining a second tilt value of the print head relative to the surface of the print medium at the first location; performing a comparison of the first tilt value with the second tilt value; and during the second motion, selectively depositing the substance onto the surface of the medium at the first location based on the comparison of the first tilt value with the second tilt value.