Chapters 1 8: Overview
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1 haptes 8: Oveview hapte : Intoduction haptes 4: Data acquisition haptes 5 8: Data anipulation hapte 5: Vetical iage hapte : Iage coodinate easueents and efineent hapte 7: Matheatical odel and bundle block adjustent hapte 8: heo of oientation & photogaetic tiangulation his chapte will cove oe details about the bundle adjustent pocedue E 59700: Digital Photogaetic Sstes an F. Habib
2 E 59700: hapte 9 Photogaetic Bundle djustent E 59700: Digital Photogaetic Sstes an F. Habib
3 Oveview Photogaetic point positioning Photogaetic bundle adjustent Stuctue of the design and noal atices Sequential estiation of the unknown paaetes Sequential building of the noal equation ati Rules of thub fo the epected pecision fo a bundle adjustent pocedue Special cases: Resection, intesection, and steeo-pai oientation E 59700: Digital Photogaetic Sstes an F. Habib
4 Photogaetic Point Positioning z c Z Pespective ente c Y a a a c X Z Y X f ( X, Y, Z, IOPs, EOPs) a f ( X, Y, Z, IOPs, EOPs) a E 59700: Digital Photogaetic Sstes 4 an F. Habib
5 Photogaetic Point Positioning GSS /IS Y Z a X Y Z X a' aea Diect Indiect Senso Geo-efeencing Oientation E 59700: Digital Photogaetic Sstes 5 an F. Habib
6 ollineait Equations: Stochastic Model ( X X ) ( Y Y ) ( Z Z ) c dist e O O O a p ( X XO) ( Y YO) ( Z ZO) ( X X ) ( Y Y ) ( Z Z ) c dist e O O O a p ( X XO) ( Y YO) ( Z ZO) e e P ~(0, o ) E 59700: Digital Photogaetic Sstes an F. Habib
7 Distotion Model dist = Radial Lens Distotion + Decentic Lens Distotion + tospheic Refaction + ffine Defoation + etc. dist = Radial Lens Distotion + Decentic Lens Distotion + tospheic Refaction + ffine Defoations + etc. E 59700: Digital Photogaetic Sstes 7 an F. Habib
8 Distotion Paaetes Radial Lens Distotion ( k k 4 k...) Radial Lens Distotion ( k k 4 k...) ( p ) { p ( ) p } Decenteing Lens Distotion ( p ) { p p ( )} Decenteing Lens Distotion whee: = {( - p ) + ( - p ) } 0.5 p p E 59700: Digital Photogaetic Sstes 8 an F. Habib
9 ollineait Equations: Involved Paaetes Iage coodinates ( a, a ) Gound coodinates (X, Y,Z ) Eteio Oientation Paaetes (X O, Y O,Z O, ) Inteio Oientation Paaetes: p, p, c aea-elated distotion paaetes that copensate fo deviations fo the assued pespective geoet Radial lens distotion (RLD), Decenteing lens distotion (DLD), ffine defoation (D) E 59700: Digital Photogaetic Sstes 9 an F. Habib
10 Bundle Block djustent E 59700: Digital Photogaetic Sstes 0 an F. Habib
11 Bundle Block djustent 0% Ovelap and 0% side lap E 59700: Digital Photogaetic Sstes an F. Habib
12 Bundle Block djustent Diect elationship between iage and gound coodinates We easue the iage coodinates in the iages of the block. Using the collineait equations, we can elate the iage coodinates, the coesponding gound coodinates, the IOPs, and the EOPs. Using a siultaneous least squaes adjustent, we can solve fo the: he gound coodinates of the tie points, he EOPs, and he IOPs (aea alibation Pocedue). E 59700: Digital Photogaetic Sstes an F. Habib
13 Bundle Block djustent: oncept he iage coodinate easueents and the IOPs define a bundle of light as. he EOPs define the position and the attitude of the bundles in space. Duing the adjustent: he bundles ae otated () and shifted (X o, Y o, Z o ) until: onjugate light as intesect as well as possible at the locations of object space tie points. Light as coesponding to gound contol points pass though the object points as close as possible. E 59700: Digital Photogaetic Sstes an F. Habib
14 Bundle Block djustent: oncept Gound ontol Points ie Points E 59700: Digital Photogaetic Sstes 4 an F. Habib
15 Bundle Block djustent: oncept Gound ontol Points ie Points E 59700: Digital Photogaetic Sstes 5 an F. Habib
16 Least Squaes djustent Gauss Makov Model Obsevation Equations e o P e n n n n n obsevation design vecto noise ati of e vecto ~ unknowns containat ing the obsevation vecto vaiance covaiance (0, o P ) ati of the noise vecto E 59700: Digital Photogaetic Sstes an F. Habib
17 Least Squaes djustent ˆ ( P) P D e~ ˆ ˆ ˆ o ( e ~ o ( P) Pe~ ) / ( n ) E 59700: Digital Photogaetic Sstes 7 an F. Habib
18 on Linea Sste Y a( X ) e a( X ) is the non linea function We use alo Seies Epansion Y a( X Whee : X o Y a( X a X o o e Whee : Y a( X X a ) X a ) X o ) X X o o ( X X ( X X o o ) e (We ignoe highe ode tes) is appoiat e values fo the unknown paaetes ) e o Iteative solution fo the unknown paaetes When should we stop the iteations? E 59700: Digital Photogaetic Sstes 8 an F. Habib
19 Eaple (4 Iages in wo Stips) 4 5 I 4 5 II ontol Point ie Point III IV E 59700: Digital Photogaetic Sstes 9 an F. Habib
20 Balance Between Obsevations & Unknowns ube of obsevations: 4 = 48 obsevations (collineait equations) ube of unknowns: = unknowns Redundanc: ssuptions: IOPs ae assued to be known and eoless. Gound coodinates of the contol points ae eoless. E 59700: Digital Photogaetic Sstes 0 an F. Habib
21 Stuctue of the Design Mati (B) Y = a(x) + e e ~ (0, P - ) Using appoiate values fo the unknown paaetes (X o ) and patial deivatives, the above equations can be lineaized leading to the following equations: 48 = 48 + e 48 e ~ (0, P - ) E 59700: Digital Photogaetic Sstes an F. Habib
22 Stuctue of the Design Mati I II III IV 45 = = E 59700: Digital Photogaetic Sstes an F. Habib
23 Stuctue of the oal Mati I II III IV 4 5 E 59700: Digital Photogaetic Sstes an F. Habib
24 Saple Data caeas. 4 iages. points. ll the points appea in all the iages wo iages wee captued b each caea E 59700: Digital Photogaetic Sstes 4 an F. Habib
25 Stuctue of the oal Mati: Eaple E 59700: Digital Photogaetic Sstes 5 an F. Habib
26 E 59700: Digital Photogaetic Sstes an F. Habib Obsevation Equations ) ~ (0, P e e o n n n n n n n e e n n n n n ube of obsevations (iage coodinate easueents) ube of unknowns: ube of iages (EOPs of the iages) ube of tie points (gound coodinates of tie points) = +
27 E 59700: Digital Photogaetic Sstes an F. Habib 7 oal Equation Mati ) ( ) ( ) ( P P P P
28 E 59700: Digital Photogaetic Sstes an F. Habib 8 oal Equation Mati is a block diagonal ati with sub-blocks along the diagonal. is a block diagonal ati with sub-blocks along the diagonal. ˆ ˆ Question: Unde which cicustances will we deviate fo this stuctue?
29 E 59700: Digital Photogaetic Sstes an F. Habib 9 Reduction of the oal Equation Mati ˆ ˆ ˆ ˆ ˆ ˆ ˆ ˆ ˆ Solving fo fist: < Reebe: is a block diagonal ati with sub-blocks along the diagonal.
30 E 59700: Digital Photogaetic Sstes an F. Habib 0 Reduction of the oal Equation Mati ˆ ˆ ˆ ˆ ˆ ˆ ˆ ˆ ˆ Solving fo fist: < Reebe: is a block diagonal ati with sub-blocks along the diagonal.
31 E 59700: Digital Photogaetic Sstes an F. Habib Reduction of the oal Equation Mati } {ˆ o D } {ˆ D o Vaiance covaiance ati of the estiated paaetes:
32 E 59700: Digital Photogaetic Sstes an F. Habib Building the oal Equation Mati We would like to investigate the possibilit of sequentiall building up the noal equation ati without full building the design ati. (, ) iage coodinates of the i th point in the j th iage i j i j e e
33 E 59700: Digital Photogaetic Sstes an F. Habib oal Equation Mati i j i j i j P P P P P P P P e
34 E 59700: Digital Photogaetic Sstes an F. Habib 4 oal Equation Mati i j i j P P P P P P ote: We cannot solve this ati fo the: he Eteio Oientation Paaetes of the j th iage, and he gound coodinates of the i th point.
35 E 59700: Digital Photogaetic Sstes an F. Habib 5 oal Equation Mati ˆ ˆ Question: How can we sequentiall build the above atices? ssuption: ll the points ae coon to all the iages.
36 E 59700: Digital Photogaetic Sstes an F. Habib -Mati ) ( i i i i i i i i If all the points ae not coon to all the iages: he suation should be caied ove all the points that appea in the iage unde consideation.
37 E 59700: Digital Photogaetic Sstes an F. Habib 7 -Mati ) ( j j j j j j j j If all the points ae not coon to all the iages: he suation should be caied ove all the iages within which the point unde consideation appeas.
38 -Mati ( ) If point i does not appea in iage j : ( ) = 0 E 59700: Digital Photogaetic Sstes 8 an F. Habib
39 E 59700: Digital Photogaetic Sstes an F. Habib 9 - Mati i i i i i i i i j j j j j j j j Once again, we assued that all the points ae coon to all the iages.
40 Pecision of Bundle Block djustent he pecision of the estiated EOPs as well as the gound coodinates of tie points can be obtained b the poduct of: he estiated vaiance coponent, and he invese of the noal equation ati (cofacto ati). he pecision depends on the following factos: Geoetic configuation of the iage block Base-Height atio Iage scale Iage coodinate easueent pecision E 59700: Digital Photogaetic Sstes 40 an F. Habib
41 Pecision of Bundle Block djustent Pecision of a single odel: If we have Bundle block adjustent with additional paaetes that copensate fo vaious distotions Regula blocks with 0%ovelap and 0% side lap Signalized tagets XY Z Z 0.00% of the caea pincipal distance ( and W caeas) 0.004% of the caea pincipal distance (SW caeas) hese pecision values ae given in the iage space E 59700: Digital Photogaetic Sstes 4 an F. Habib
42 aea lassification < 75 oal angle caea () 00 > > 75 Wide angle caea (W) > 00 Supe wide angle caea (SW) E 59700: Digital Photogaetic Sstes 4 an F. Habib
43 Pecision of Bundle Block djustent P z Z X = * Z / c Y = * Z / c X Y Z X Y Z c Z c Y X E 59700: Digital Photogaetic Sstes 4 an F. Habib
44 Pecision of Bundle Block djustent Vetical Pecision Flight Diection -ais B c a a a H P = - P / B = c / H H = B c / P E 59700: Digital Photogaetic Sstes 44 an F. Habib
45 Pecision of Bundle Block djustent Vetical Pecision Z Z c Z B p B c Z E 59700: Digital Photogaetic Sstes 45 an F. Habib
46 dvantages of Bundle Block djustent Most accuate tiangulation technique since we have diect tansfoation between iage and gound coodinates. Staight fowad to include paaetes that copensate fo vaious deviations fo the collineait odel. Staight fowad to include additional obsevations: GPS/IS obsevations at the eposue stations Object space distances an be used fo noal, convegent, aeial, and close ange iage fte the adjustent, the EOPs can be set on analog and analtical plottes as well as digital photogaetic wokstations fo copilation puposes. E 59700: Digital Photogaetic Sstes 4 an F. Habib
47 Photogaetic opilation E 59700: Digital Photogaetic Sstes 47 an F. Habib
48 Disadvantages of Bundle Block djustent Model is non linea: appoiations as well as patial deivatives ae needed. Requies copute intensive coputations nalog instuents cannot be used (the cannot easue iage coodinate easueents). he adjustent cannot be sepaated into planietic and vetical adjustent. E 59700: Digital Photogaetic Sstes 48 an F. Habib
49 Bundle djustent: Final Reaks Eleenta Unit: Iages Measueents: Iage coodinates Matheatical odel: ollineait equations Instuents: opaatos, analtical plottes, and Digital Photogaetic Wokstations (DPW) Requied copute powe: Ve lage Epected accuac: High E 59700: Digital Photogaetic Sstes 49 an F. Habib
50 Special ases Resection Intesection Steeo-pai oientation Relative oientation (Discussed in hapte 8) Dependent Relative Oientation (DRO), and Independent Relative Oientation E 59700: Digital Photogaetic Sstes 50 an F. Habib
51 Resection We ae dealing with one iage. We would like to deteine the EOPs of this iage using GPs. Q: What is the iniu GP equieents? t least non-collinea GPs ae equied to estiate the EOPs. t least 5 non-collinea (well distibuted in -D) GPs ae equied to estiate the EOPs and the IOPs ( p, p, c). itical suface: he GPs and the pespective cente lie on a coon clinde. E 59700: Digital Photogaetic Sstes 5 an F. Habib
52 Resection eteio oientation inteio oientation E 59700: Digital Photogaetic Sstes 5 an F. Habib
53 Resection - itical Suface Question: Which paaete of the EOPs cannot be deteined? E 59700: Digital Photogaetic Sstes 5 an F. Habib
54 Intesection We ae dealing with two iages. he EOPs of these iages ae available. he IOPs of the involved caea(s) ae also available. We want to estiate the gound coodinates of tie points in the ovelap aea. Fo each tie point, we have: 4 Obsevation equations Unknowns Redundanc = on-linea odel: appoiations ae needed E 59700: Digital Photogaetic Sstes 54 an F. Habib
55 Intesection a a P P Object Point () E 59700: Digital Photogaetic Sstes 55 an F. Habib
56 Intesection: Linea Model O l B O V l V X Y Z E 59700: Digital Photogaetic Sstes 5 an F. Habib
57 E 59700: Digital Photogaetic Sstes an F. Habib 57 Intesection: Linea Model c R V c R V Z Z Y Y X X B p p p l p l l O O O O O O l l l l l l ),, ( ),, ( hese vectos ae given w..t. the gound coodinate sste.
58 E 59700: Digital Photogaetic Sstes an F. Habib 58 Intesection: Linea Model c R c R Z Z Y Y X X V B V p p p l p l o o o o o o l l l l l l l ),, ( ),, ( hee equations in two unknowns (). he ae linea equations.
59 E 59700: Digital Photogaetic Sstes an F. Habib 59 Intesection: Linea Model c R Z Y X Z Y X p l p l O O O l l l l l l ),, ( c R Z Y X Z Y X p p O O O ),, ( O:
60 Given: Steeo-pai Oientation Steeo-pai: two iages with at least 50% ovelap Iage coodinates of soe tie points Iage and gound coodinates of contol points Requied: he gound coodinates of the tie points he EOPs of the involved iages Mini-Bundle djustent Pocedue E 59700: Digital Photogaetic Sstes 0 an F. Habib
61 Eaple: Given: Steeo-pai Oientation Steeo-pai 0 tie points o gound contol points Question: an we estiate the gound coodinates of the tie points as well as the eteio oientation paaetes of that steeo-pai? nswe: O E 59700: Digital Photogaetic Sstes an F. Habib
62 Sua Photogaet: Definition and applications Photogaetic tools: Rotation atices Photogaetic oientation: inteio and eteio oientation ollineait equations/conditions Photogaetic bundle adjustent Stuctue of the design and noal atices Special cases: Resection, intesection, and steeo-pai oientation E 59700: Digital Photogaetic Sstes an F. Habib
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