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References

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  1. Alexander Murray, J. Frank. Inst. 221, 721–744 (1936).
  2. J. A. C. Yule, J. Frank. Inst. 231, 23–38 (1941).

1941 (1)

J. A. C. Yule, J. Frank. Inst. 231, 23–38 (1941).

1936 (1)

Alexander Murray, J. Frank. Inst. 221, 721–744 (1936).

Murray, Alexander

Alexander Murray, J. Frank. Inst. 221, 721–744 (1936).

Yule, J. A. C.

J. A. C. Yule, J. Frank. Inst. 231, 23–38 (1941).

J. Frank. Inst. (2)

Alexander Murray, J. Frank. Inst. 221, 721–744 (1936).

J. A. C. Yule, J. Frank. Inst. 231, 23–38 (1941).

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Figures (4)

Fig. 1
Fig. 1

Unit square areas of regions on a halftone reproduction. Values of DR are shown for Db = 1.4.

Fig. 2
Fig. 2

Densities of halftone tints vs. dot areas—uniform absorption scale.

Fig. 3
Fig. 3

Densities of halftone tints vs. dot areas—uniform density scale.

Fig. 4
Fig. 4

Slide rule for halftone density values versus dot areas. ab = fractional black dot area; Db = optical density of black area; DR = integrated density of region in halftone reproduction.

Equations (5)

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D R = log 1 / [ 1 - a b ( 1 - R b ) ] ,
D R = - log [ a b R b + ( 1 - a b ) R w ] .
A R = a b A b + ( 1 - a b ) A w .
A R = a b A b .
D R = log { 1 / [ 1 - a b ( 1 - 1 / antilog D b ) ] } .