Very famous test “image” for which standard?

P.S: We will be closing questions and returning to normal modding schedule on 3rd Dec. Pleej to post answers by then (this question will close on 3rd)

Cracked by: shrik, Rahulk, Manish Achuth, Amarendra Kumar, KK, rickde, raklodramA, Sumanth Patlolla, Anjul, SV, Sujoy, jowens, Bharath and Rogi