ISPRS Workshop on Service and Application of Spatial Data Infrastructure, XXXVI(4/W6), Oct.14-16, Hangzhou, China 
Figure 6. The parallax map of the IKONOS images 
Feature Space 
Search Strategy 
Similarity Measure 
Achievement 
subpixel accuracy 
Raw Intensity 
Hierarchical 
Normalized cross 
correlation 
Intensity 
interpolation 
Matching Against Model 
Genetic Algorithm 
Correlation coefficient 
Correlation 
interpolation 
Higher Level 
Simulated Annealing 
Statistical correlation and 
matched filters 
Single point Least 
Squares matching 
Statistical 
Hopfield networks 
Phase-correlation 
Salient/comer 
Relaxation 
Sum of absolute differences 
Surface 
Tree and graph match 
Masked correlation 
Contour 
Linear Programming 
Edges 
Least squares matching 
Winner take all 
Table 1. Numerous techniques for image matching