1. A method for promoting temporal resolution of sequential images, comprising: choosing a first visual frame of a train of sequential images and splitting it into a plurality of visual blocks according to a predetermined value; choosing a second visual frame of the train of sequential images; searching the second visual frame for mostly resembling respective visual blocks corresponding to every visual block in the first visual frame; estimate the vector displacement of respective corresponding visual blocks of the first and the second visual frame; rebuilding a visual frame according to the vector displacement obtained above and estimate the respective pixel values of respective corresponding visual blocks of the first and the second visual frame at a time point and combining the pixel values of visual blocks to create the rebuilt visual frame; applying a median-value-filtering procedure upon the rebuilt visual frame; and applying a spatial low-pass filtering procedure upon the rebuilt visual frame, which has undergone the previous procedure.