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Image Registration: Difference between revisions
→Phase correlation
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==Phase correlation== | ==Phase correlation== | ||
{{main | Wikipedia: Phase correlation}} | {{main | Wikipedia: Phase correlation}} | ||
By the [https://en.wikipedia.org/wiki/Discrete_Fourier_transform#Shift_theorem Fourier shift theorem], a translation in the spatial domain is a linear phase shift in the Fourier domain.<br> | |||
Hence, if you have two images with only a translation, you can identify the translation by estimating the phase shift. | Hence, if you have two images with only a translation, you can identify the translation by estimating the phase shift. | ||