By John E. W. Mayhew, John P. Frisby
3D version reputation from Stereoscopic Cues ЕСТЕСТВЕННЫЕ НАУКИ, ПРОГРАММИНГ 3D version acceptance from Stereoscopic Cues (Artificial Intelligence Series)ByJohn E.W. Mayhew, John P. FrisbyPublisher:MIT Press1991 286 PagesISBN: 0262132435PDF61 MB3D version acceptance from Stereoscopic Cues offers a wealthy, built-in account of labor performed inside of a large-scale, multisite, Alvey-funded collaborative undertaking in laptop imaginative and prescient. It offers a number of equipment for deriving floor descriptions from stereoscopic info and for matching these descriptions to three-d types for the needs of item reputation, imaginative and prescient verification, independent motor vehicle tips, and robotic notebook suggestions. state-of-the-art imaginative and prescient structures are defined in enough aspect to permit researchers to copy the consequences. sharingmatrix importing eighty five 1 2 three four five
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Additional info for 3-D Model Recognition from Stereoscopic Cues
Let r r r B˜ ( vo ) = 0 B ( ro ) exp (2 / i vo u ro ) d ro r r r r r I˜i ( vi ) = 0 Ii ( ri ) exp (2 / i vi r (1-67) and r u ri ) d ri (1-68) be the spectral components of the object and image corresponding to the object and image r r spatial frequencies vo and vi , respectively, where r r vi = vo M . (1-69) 28 IMAGE FORMATION Substituting Eq. (1-56c) into Eq. (1-68) and suppressing the zi dependence of the PSF and the OTF, we obtain r r r I˜i ( vi ) = 0 d ri exp (2 / i vi = r r r r r r r r r r u ri ) 0 Ig ( rg ) PSF ( ri < rg ) d rg r r r r r 0 d rg Ig (rg ) exp (2/i vi u rg ) 0 PSF (ri < rg ) exp [2/ vi u (ri < rg )] d ri r r = I˜g ( vi ) o ( vi ) , (1-70) r where I˜g ( vi ) is the spectral component of the Gaussian image corresponding to a spatial r frequency vi and r r r r o ( vi ) = 0 PSF ( ri ) exp (2 / i vi r u ri ) d ri (1-71) is called the optical transfer function (OTF) of the imaging system at this frequency.
It should be noted that the waves with spatial frequencies v > 1 h or _ 2 + ` 2 > 1 correspond to an imaginary value of a . Such waves decay exponentially to negligible values in a short distance as they propagate, and are called evanescent waves. Hence, the region of integration in the (_, `) plane is limited to _ 2 + ` 2 ) 1. ( ) The free-space transfer function, namely, exp (ik a z ) may be written [ ( H (_, `; z ) = exp ¨©ik z 1 < _ 2 + ` 2 ª )] 1/ 2 ¬ ( Rayleigh < Sommerfeld) . , for small angles of diffraction with z axis, Eq.
1-55) by 2 U ( ro ) , we may also write the PSF in the form r r PSF (ri ; z i ) Û r Ê 2pi r r ˆ r 1 = rp ri ˜ d rp 2 2 Ù P rp ; z i exp Á Ë lR ¯ Pex l R ı ( ) ◊ 2 , (1-57) r r where we have suppressed any explicit dependence on ro , and the position vector ri is r written with respect to rg . The irradiance distribution of the image of a particular object element is obtained by multiplying the PSF by Pex for that element. 5 PHYSICAL SIGNIFICANCE OF INCOHERENT PSF To understand the physical significance of the PSF defined by Eq.