Patent ID: 9731494
Date: 2017-08-15
CPC Classifications: B29C,B33Y,B41J,G03G

Claim:
1. A method of setting a density value to each of plural pixels in image data for applying heat absorbing agents on a medium as an image, wherein a first average density value of a first predetermined number of pixels including a target pixel among the plural pixels is calculated and a second average density value of a second predetermined number of pixels including the target pixel among the plural pixels is calculated, the second predetermined number of pixels being larger than the first predetermined number of pixels, the method comprising: maintaining an initial density value of the target pixel, when the initial density value of the target pixel or the first average density value is not larger than a first prescribed threshold value or when the initial density value of the target pixel or the second average density value is not larger than a second prescribed threshold value, the second prescribed threshold value being smaller than the first prescribed threshold value; and setting the density value of the target pixel to the first average density value, when the initial density value of the target pixel and the first average density value are not smaller than the first prescribed threshold value and when the initial density value of the target pixel and the second average density value are not smaller than the second prescribed threshold value.