1. A method for measuring video quality of a sequence of distorted video pictures, wherein the respective video pictures are also available as undistorted video pictures, comprising steps of dividing the pictures into blocks of equal size; generating a first similarity map, wherein the blocks of a distorted picture f and the corresponding collocated blocks of a temporally neighboring distorted picture f′ are input to a first similarity function f sim,1 (f,f′)= CM (f,f′) that outputs a first similarity map; generating a second similarity map, wherein the blocks of an undistorted picture f 0 and the corresponding collocated blocks of a temporally neighboring undistorted picture f′ 0 are input to the first similarity function f sim,1 (f 0 ,f′ 0 )= CM (f 0 ,f′ 0 ) that outputs a second similarity map; calculating the similarity between the first similarity map and the second similarity map, wherein a second similarity function f sim,2 (X,Y) is used according to VQM variation =f sim 2 ( CM (f,f′), CM (f 0 ,f′ 0 )) and wherein a single numerical value is obtained; and providing said single numerical value as a measure for the video quality of said sequence of distorted video pictures.