X hits on this document

33 views

0 shares

0 downloads

0 comments

7 / 13

Clone brush (Photoshop)

Perspective clone brush

Click on a reference pixel (blue) Then start painting somewhere else Copy pixel color with a translation

Oh, Durand, Dorsey, unpublished Correct for perspective And other tricks

Rotational Mosaics

  • Can we say something more about rotational

mosaics?

  • i.e. can we further constrain our H?

3D 2D Perspective Projection

3D Rotation Model

f

uc

u

( X c , Y c , Z c )

1. 2. 3.

Projection equations Project from image to 3D ray

(x0,y0,z0)

= (u0-uc,v0-vc,f)

Rotate the ray by camera motion

(x1,y1,z1)

= R01 (x0,y0,z0)

Project back into new (source) image

(u1,v1) = (fx1/z1+uc,fy1/z1+vc) Therefore:

(x,y,z)

R (x y,z)

f

(u,v,f)

(u,v,f)

H = K0R01K

1 1

K

  • Our homography has only 3,4 or 5 DOF, depending if focal length is known, same, or different.

    • This makes image registration much better behaved

7

Document info
Document views33
Page views33
Page last viewedMon Dec 05 03:27:09 UTC 2016
Pages13
Paragraphs605
Words2308

Comments