Patent Document ID: 9836855
Application ID: 13606822
Patent Status: 1

Claim One:
1. A method for determining a depth measurement associated with a scene captured by an image capture device, the method comprising: receiving a first image and a second image of the scene captured by the image capture device, the first image being captured using at least one different camera parameter than that of the second image; selecting a first patch from the first image; selecting a second patch from the second image to correspond with the first patch such that the first and second patches represent a common part of the scene; determining which of the first and second patches is more focused; calculating Fourier transforms for each of the first and second patches; and calculating a ratio of the Fourier transforms corresponding to the first and second patches to produce an estimate of a complex OTF ratio, with the Fourier transform of the more focused patch as denominator of the ratio, the estimate of the complex OTF ratio representing relative blur of the first and second patches and being a function of distance to the objects in the common part of the scene; and determining the depth measurement of the common part of the scene from the estimate of the complex OTF ratio.