Box Decode Offsets

Problem

Decode predicted offsets back into a box given an anchor.

Anchor and box are [cx, cy, w, h]; for offsets [dx, dy, dw, dh] return [acx + dx * aw, acy + dy * ah, aw * exp(dw), ah * exp(dh)] rounded to 4 decimal places.

Test cases

case 1

in: [[0,0,10,10],[0,0,0,0]]

expected: [0,0,10,10]

case 2

in: [[5,5,10,10],[0.2,-0.1,0.6931,-0.6931]]

expected: [7,4,19.9991,5.0002]

case 3

in: [[1,1,2,4],[0.5,0.5,0.6931,-0.6931]]

expected: [2,3,3.9998,2.0001]

Starter codePython

def decode_box(anchor, offsets):
    # Your code here
    pass

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