Annular Spatial Pyramid Mapping and Feature Fusion-Based Image Coding Representation and Classification

Table 2

The difference degree values of transformed images.

Diff	45°	90°	180°	225°	270°	315°
SPM (%)	12.15	22.42	28.95	34.26	32.41	36.50
R-SPM (%)	2.33	1.94	1.61	1.84	2.19	1.42