Poisson blending: Many image and video editing techniques apply Poisson blending to smooth boundary artifacts when visual
media are composed. This operation performs in the gradient field of an image and has attracted significant attention in research
works [16–19]. Our system also applies this operation to smooth discontinuity artifacts when transiting one video to another. Given
that Poisson blending requires solving a large linear system, which consumes expensive computational cost, there were also techni-
ques presented to improve its performance [20–23].