Patent ID: 11947315
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Optics (Instruments)
Classification: CPC G  B | IPC B  G

Claim 6:
7. The holographic projection system of claim 6, wherein:
the first contrast ratio is determined based on (i) a sum of luminance levels of bright objects displayed in the first version of the test image, (ii) a sum of luminance level of selected transparent regions of the first version of the test image, (iii) a number of the bright objects displayed in the first version of the test image, and (iv) a number of the selected transparent regions of the first version of the test image; and
the second contrast ratio is determined based on (i) a sum of luminance levels of bright objects displayed in the second version of the test image, (ii) a sum of luminance level of selected transparent regions of the second version of the test image, (iii) a number of the bright objects displayed in the second version of the test image, and (iv) a number of the selected transparent regions of the second version of the test image.