  Reconstructing textureless areas in MVS poses challenges due to the absence
of reliable pixel correspondences within fixed patch. Although certain methods
employ patch deformation to expand the receptive field, their patches
mistakenly skip depth edges to calculate areas with depth discontinuity,
thereby causing ambiguity. Consequently, we introduce Multi-granularity
Segmentation Prior Multi-View Stereo (MSP-MVS). Specifically, we first propose
multi-granularity segmentation prior by integrating multi-granularity depth
edges to restrict patch deformation within homogeneous areas. Moreover, we
present anchor equidistribution that bring deformed patches with more uniformly
distributed anchors to ensure an adequate coverage of their own homogeneous
areas. Furthermore, we introduce iterative local search optimization to
represent larger patch with sparse representative candidates, significantly
boosting the expressive capacity for each patch. The state-of-the-art results
on ETH3D and Tanks & Temples benchmarks demonstrate the effectiveness and
robust generalization ability of our proposed method.
