The invention discloses a foundation 
cloud atlas classification method based on spatial 
pyramid random mapping. The method comprises the following steps of firstly, extracting local features from each training foundation 
cloud atlas sample in a denseness sampling manner; then, carrying out 
dimensionality reduction on each local feature by applying 
random mapping, and mapping an original high-dimensionality 
feature set to a low-dimensionality subspace; then, clustering features which are subjected to 
dimensionality reduction in the low-dimensionality subspace, so as to obtain a 
codebook; then, dividing a 
sample image into different areas according to a spatial 
pyramid model, obtaining area features of the different areas according to the 
codebook, combining the area features, and taking the combined area features as final feature representation of the 
sample image; finally, obtaining a 
classification result of a tested foundation 
cloud atlas by applying a 
support vector machine classifier. According to the method, spatial information of the image can be obtained through applying the spatial 
pyramid model, so that information in the cloud atlas can be better represented; meanwhile, the local features of the image are subjected to 
dimensionality reduction by adopting 
random mapping, so that the efficiency of a foundation cloud atlas classification 
system can be increased, the time expense is reduced, and the dimensionality disaster can be avoided.