COLOR CAMERA GRAY SCALE TEST CHART

                                                       REFLECTANCE

Two 9-graduated counter current gray scales are arranged on a gray background (D ≈ 0.75), the gray scales being graduated

logarithmically(gamma = 0.45). The output of an optimally gamma-corrected camera yields two 9-graduated counter current linear

step signals. The contrast range of the gray scales is 50:1.

The values of the 9-graduated gray scale are as follows:

The density values are based on a density of BaO4S= 0.

The test chart incorporates a super black cavity for the accurate adjustment of camera flare corrections and setting of black level.

On both sides of the super black hole 4.5 and 5.5MHz bars with a contrast ratio of 7:1 are located. Above and below the gray

scales there are additional markings for the 16:9 format.