BACKGROUND

Printing systems may convert input data (for example, data representing an image for two-dimensional printing, or data representing an object for three dimensional printing) to print instructions, which specify where print materials (for example, colorants such as inks or toners or other printable materials) are to be placed in a print operation.

Examples of techniques used in converting data may include use of threshold matrices, in which a particular print material or material combination (a print material selection herein) is assigned a probability of being applied in a particular location and the choice is made by comparing the probability values for the location to a threshold value. For example, a print material may be selected such that a drop of a particular color ink or other print material will be placed at a particular pixel to form an image.

