Double Threshold Classification

Problem

Classify pixels with a double threshold.

Return 255 when v > high, 128 when low < v <= high, and 0 when v <= low. Both low and high comparisons are strict on the low side.

case 1

in: [[[0,50,100],[150,200,255]],50,150]

expected: [[0,0,128],[128,255,255]]

case 2

in: [[[0,0],[255,255]],100,200]

expected: [[0,0],[255,255]]

case 3

in: [[[50,50]],50,100]

expected: [[0,0]]

case 4

in: [[[100]],50,100]

expected: [[128]]

Starter codePython

def double_threshold(image, low, high):
    # Your code here
    pass

4 test cases · run your code against them in the editor