Brother P-TOUCH 3.1 - Manual (Page 136)

Method
Select the method to be used for converting the image.
Dither
Click this method to select pattern dithering. Black and white are defined and shading is
expressed by comparing the density of each point to a pixel and dot map in a two-dimensional
matrix. ●
Error Diffusion
Click this method to select average error minimization dithering. Black and white are defined
by comparing a fixed value with the average product of error values and distances. ●
Edge
Click this method to make areas with rapidly changing densities black, and other area white. ●
Binary
Click this method for binary dithering. Pixels whose brightness exceeds a particular value are
white, and pixels whose brightness are less than the value are black. ●
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