Patent Document ID: 8213740
Application ID: 12454485
Patent Status: 1

Claim One:
1. A method of coherent image correlation, comprising the steps of: obtaining an open/closed aperture theorem conformal image; obtaining a second image, said conformal image and said second image being one of a sonar and a radar image; grazing angle compensating said conformal image and said second image; and correlating said conformal image and said second image; wherein correlating comprises calculating a correlation coefficient ρ corresponding to each possible image shift (Δx,Δy); and wherein calculating a correlation coefficient comprises obtaining a correlation image ρ(Δx,Δy) based on ρ 12 ⁡ ( Δ ⁢ ⁢ x , ⁢ Δ ⁢ ⁢ y ) = σ 12 ⁡ ( Δ ⁢ ⁢ x , ⁢ Δ ⁢ ⁢ y ) σ 1 ⁢ σ 2 , where: σ n 2 ⁢ = ⁢ ∫ ∫ I n 2 ⁡ ( x , y ) ⁢ ⁢ ⅆ x ⁢ ⅆ y - μ n 2 ; 
 μ n =∫∫I n ( x,y ) dxdy; 
 σ 12 (Δ x,Δy )=∫∫ I 1 ( x,y ) I 2 (Δ x−x,Δy−y ) dxdy−μ 1 μ 2 ; and I 1 (x,y), I 2 (x,y) denote said conformal image and said second image, respectively.