Fig. 5From: Multi-contrast brain magnetic resonance image super-resolution using the local weight similarityAn illustration of ∑ 4 j = 1 b j  ≈ 1. a A synthetic image of size 256 × 256 in which the red solid wireframe draws out a local region of size 9 × 9; b Repeated pixels of each x j and y are indicated by an arrow; Collections of all of pixels from x j and y were displayed in (c-g) respectivelyBack to article page