Final answer:
The minimum contrast ratio for basic decision-making tasks according to the ANSI/InfoComm 3M-2011 PISCR standard is 35:1.
Step-by-step explanation:
The ANSI/InfoComm 3M-2011 Projected Image System Contrast Ratio (PISCR) standard specifies the minimum contrast ratio required for basic decision-making tasks to be 35:1. This means that the brightest parts of the projected image should be at least 35 times brighter than the darkest parts.
For example, if the darkest part of the image has a brightness level of 10 units, then the brightest part should have a brightness level of at least 350 units. This ensures that the image is clear and easily distinguishable, allowing for effective decision making.