The application discloses an indoor-oriented three-dimensional
Gaussian diffusion model
point cloud repairing method, expresses a missing
point cloud as a three-dimensional
point set, introduces a
point cloud centroid as a spatial reference center, constructs a progressive-
axis distance component of each point relative to the
centroid, and calculates a second-order statistic in each axis direction as a directional scale
signal; according to the deviation of the directional scale
signal from a reference scale, the
noise intensity is re-calibrated in each axis direction to form a
diagonal covariance form of a directional adaptive three-dimensional
Gaussian forward
diffusion model; a denoising network is used to predict
noise components in each
diffusion step and update according to the progressive-axis diffusion intensity, while an observation consistency constraint is introduced; finally, a diffusion standard
loss function is used to
train the error between the real
noise injected in the forward diffusion model and the predicted noise, and an optimized diffusion model is obtained. The method can be applied to indoor three-dimensional reconstruction, digital twinning,
robot perception and indoor point cloud dataset enhancement scenes.