Table 129 – PDF halftone types

Type

Meaning

1

Defines a single halftone screen by a frequency, angle, and spot function.

5

Defines an arbitrary number of halftone screens, one for each colorantor colour component (including both primary and spot colorants). The keys in this dictionary are names of colorants; the values are halftone dictionaries of other types, each defining the halftone screen for a single colorant.

6

Defines a single halftone screen by a threshold array containing 8-bit sample values.

10

Defines a single halftone screen by a threshold array containing 8-bit sample values, representing a halftone cell that may have a nonzero screen angle.

16

(PDF 1.3) Defines a single halftone screen by a threshold array containing 16-bit sample values, representing a halftone cell that may have a nonzero screen angle.