Color Temperature Shift

Problem

Shift the color temperature of an RGB image with per-channel scaling.

Multiply the red channel by factor, keep green unchanged, and divide blue by factor, rounding to the nearest integer and clamping each channel to [0, 255]. factor is positive.

Test cases

case 1

in: [[[[100,100,100]]],1.2]

expected: [[[120,100,83]]]

case 2

in: [[[[255,0,255]]],0.5]

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

case 3

in: [[[[10,20,30]]],1]

expected: [[[10,20,30]]]

case 4

in: [[[[10,20,30]]],2]

expected: [[[20,20,15]]]

Starter codePython

def temperature_shift(image, factor):
    # Your code here
    pass

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