can any one tell me what is the meaning of mask = redChannel <= 20 & greenChannel <= 20 & blueChannel <= 20;

mask = redChannel <= 20 & greenChannel <= 20 & blueChannel <= 20; this statement is in the test.m programe so any one can explain me why we use this line code i attached the code

Answer 1

[Walter Roberson]

The result would be to detect anything "close" to absolute black.

[asthana]

oh thank you mr. roberson