Chromatic Contrast

1. COMPARE L TO M RESPONSES IN EACH AREA

2. COMPARE THIS VALUE IN AREA A WITH AREA B

Figure 7 In order to establish chromatic contrast, a unit area of chromatic space must be compared with a neighboring area of chromatic space. Two neighboring L and M cones cannot be compared because a border of any wavelength could create ambiguity.

Figure 8 The degree of spatial resolution of the achromatic and chromatic systems of human vision and their distribution across the retina. The symbols represent the data of two normal subjects. They are shown in relationship to the optical properties of the eye and the filtering characteristics of the cones and ganglion cells of the retina (reprinted with permission of Cambridge University Press).

Figure 8 The degree of spatial resolution of the achromatic and chromatic systems of human vision and their distribution across the retina. The symbols represent the data of two normal subjects. They are shown in relationship to the optical properties of the eye and the filtering characteristics of the cones and ganglion cells of the retina (reprinted with permission of Cambridge University Press).

contrast across the human retina. Everywhere the former is lower than the latter, and this increases with eccentricity. Chromatic vision is relatively more developed centrally than achromatic vision.

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