Block Sampling

Block sampling is a natural extension to the previous pixel-based methods, which improves time efficiency of the synthesis by using image blocks as basic synthesis units. So, instead of pixel by pixel, block sampling synthesises a texture on a block by block basis.

Figure 5.6: Patch-based non-parametric sampling: (a) The boundary zones in a new and a already synthesised patches. (b) The overlapping boundary zones after a new patch is placed into the output texture. The arrows indicate the synthesis is performed in a scanline order.

(a)	(b)