Threshold values [ 1 2 3 4 5 6 7.. ]

My prof asked me to use brute force method, using threshold value of 1 2 3 4 5 6 7.. on each images i have. May i know why is there so many value? i thot it's using level between 0 - 1? thanks!

[Honglei Chen]

Why not just ask your professor? The image could have a gray scale between 0 and 255.

[Esther]

how do i do about using scalar for thresholding?

[Walter Roberson]

Out1 = YourImage < 1;
Out2 = YourImage < 2;
Out3 = YourImage < 3; %...