Patent Document ID: 9064304
Application ID: 13846447
Patent Status: 1

Claim One:
1. A computer-implemented method for assessing image quality, comprising: acquiring a first image and a second image, wherein at least a portion of the first image and the second image overlap; determining a rotation and a scale relating the first image and the second image; rotating and scaling a respective Fourier transform of the first image to correspond to a respective Fourier transform of the second image; determining a translation for the respective first image and the second image based upon the rotated and scaled Fourier transforms of the first image and the second image; determining a score quantifying the quality of the registration of the first image and the second image; and wherein determining the rotation and the scale comprises: Fourier transforming the first image and the second image to generate a respective first spatial frequency bin and second spatial frequency bin; extracting a first modulus from the first spatial frequency bin and a second modulus from the second spatial frequency bin to generate a first translation invariant signature and a second translation invariant signature; performing a log-polar transformation of the first translation invariant signature and the second translation invariant signature; in log-polar space, performing a Fourier domain correlation operation; and determining the rotation and the scale based on the result of the Fourier domain correlation operation.