Bundle adjustment with additional constraints applied to imagery of the Dunhuang wall paintings

2012 ◽  
Vol 72 ◽  
pp. 113-120 ◽  
Author(s):  
Yongjun Zhang ◽  
Kun Hu ◽  
Rongyong Huang
Keyword(s):  
Bundle Adjustment ◽  
Wall Paintings ◽  
Additional Constraints

A Practical Study of Gross-Error Detection in Bundle Adjustment

1981 ◽  
Vol 35 (4) ◽  
pp. 373-386 ◽  
Author(s):  
S. F. El-Hakim
Keyword(s):  
Error Detection ◽  
Bundle Adjustment ◽  
Image Point ◽  
Gross Error Detection ◽  
Factors Affecting ◽  
Gross Error ◽  
Adjustment Program ◽  
Error Detector ◽  
Additional Constraints ◽  
Point Type

A special bundle adjustment program has been developed with a built-in automatic gross-error detector which uses the data snooping approach. The program computes, in an efficient way, the exact value of the redundancy numbers for each image point. Using actual data, many of the factors affecting the reliability of bundle adjustment and the ability of the technique to detect gross errors are studied. The effects of different block parameters, point type and location, and the use of additional constraints are presented.

Results from a Precise Photogrammetric Densification of Urban Control Network

1982 ◽  
Vol 36 (2) ◽  
pp. 165-172
Author(s):  
S. F. EL-HAKIM
Keyword(s):  
Control Point ◽  
Systematic Errors ◽  
Bundle Adjustment ◽  
Control Network ◽  
Control Points ◽  
Mathematical Functions ◽  
Independent Field ◽  
Minimum Number ◽  
The City ◽  
Additional Constraints

Adjustment of a photogrammetric block located in the city of Sudbury, Ontario, demonstrates that an accuracy of 2 cm in planimetric coordinates can be achieved using a minimum number of control points if additional constraints in the form of observed spatial distances are combined with the photogrammetric mathematical model to reduce the control point requirement. This accuracy has been estimated by error ellipsoids of the adjusted ground coordinates, and by independent field checking. The data have also been used to compare different mathematical functions for the compensation of systematic errors in the method of bundle adjustment with self-calibration.

scholarly journals IMPROVED CONJUGATE GRADIENT BUNDLE ADJUSTMENT OF DUNHUANG WALL PAINTING IMAGES

2017 ◽  
Vol IV-2/W4 ◽  
pp. 213-218
Author(s):  
K. Hu ◽  
X. Huang ◽  
H. You
Keyword(s):  
Conjugate Gradient ◽  
Coefficient Matrix ◽  
Wall Painting ◽  
Bundle Adjustment ◽  
Cholesky Factorization ◽  
Normal Equation ◽  
Wall Paintings ◽  
Incomplete Cholesky Factorization ◽  
Preconditioning Method ◽  
Actual Accuracy

Bundle adjustment with additional parameters is identified as a critical step for precise orthoimage generation and 3D reconstruction of Dunhuang wall paintings. Due to the introduction of self-calibration parameters and quasi-planar constraints, the structure of coefficient matrix of the reduced normal equation is banded-bordered, making the solving process of bundle adjustment complex. In this paper, Conjugate Gradient Bundle Adjustment (CGBA) method is deduced by calculus of variations. A preconditioning method based on improved incomplete Cholesky factorization is adopt to reduce the condition number of coefficient matrix, as well as to accelerate the iteration rate of CGBA. Both theoretical analysis and experimental results comparison with conventional method indicate that, the proposed method can effectively conquer the ill-conditioned problem of normal equation and improve the calculation efficiency of bundle adjustment with additional parameters considerably, while maintaining the actual accuracy.

Nawalgarh Haveli Wall Paintings: The Theme Depended on Avataras

2012 ◽  
Vol 3 (3) ◽  
pp. 136-139
Author(s):  
Dr. Madan Lal Rajyora ◽  
Keyword(s):  
Wall Paintings

O̅TA GYU̅ICHI. «SHINCHŌ-KŌ KI», BOOK IX (COMMENTED TRANSLATION INTO RUSSIAN)

2020 ◽  
pp. 229-248
Author(s):  
S. A. Polkhov ◽  
Keyword(s):  
Political Ideology ◽  
Russian Translation ◽  
Wall Paintings ◽  
Pure Land ◽  
Military Leaders ◽  
Unique Information

The article provides a Russian translation of the book IX of «Shincho̅-ko̅ ki». This part of the chronicle narrates the renewal of the war between Nobunaga and Honganji Temple. The followers of the True School of Pure Land besieged in Ozaka managed to inflict painful counterattacks against the forces of the “unifier of Japan”. Nobunaga detachments, trying to capture the Kizu fortress on the outskirts of Ozaka were surrounded and defeated. Ban Naomasa, one of his prominent military leaders, was killed, the army from Ozaka attacked the Tenno̅ji fortress, and only the help immediately rendered by Nobunaga saved the garrison from death. After that, Nobunaga blocked Ozakа on land and at sea. However, the fleet of the Mo̅ri house, which joined the ranks of Nobunaga opponents, and the allies of Mo̅ri were able to defeat the naval forces of Nobunaga and deliver provisions to Ozaka, which allowed Honganji to continue the struggle. Book IX also contains a description of the construction of Azuti Castle and its main tower (tenshu), Nobunaga’s residence. The unique information of the chronicle formed the basis for the further reconstruction of the tenshu’s appearance. The castle became the personification of the wealth and omnipotence of Nobunaga, a reflection of his claims to the role of supreme ruler of Japan. The wall paintings of the main tower halls manifest the influence of Confucianism, Buddhism and Taoism. The key symbols of the images are taken from Chinese political ideology.

Distributed Bundle Adjustment in 3D Scene Reconstruction with

2012 ◽  
Vol 38 (9) ◽  
pp. 1428 ◽  
Author(s):  
Xin LIU ◽  
Feng-Mei SUN ◽  
Zhan-Yi HU
Keyword(s):  
Bundle Adjustment ◽  
Scene Reconstruction ◽  
3D Scene ◽  
3D Scene Reconstruction

WALL PAINTINGS BY SNAKE-CHARMERS IN TANGANYIKA by H. Cory. Faber, 99 pp.

1954 ◽  
Vol 1 (1) ◽  
pp. 92-92
Author(s):  
E.K. Lorimer
Keyword(s):  
Wall Paintings

Early Wall Paintings for Jesus Christ Represented in the Red Monastery

2018 ◽  
Vol 12 (3) ◽  
pp. 48-58
Author(s):  
Mofida Weshahy ◽  
Ezzat Kadous ◽  
Khaled Alpasuoni ◽  
Sara Halim
Keyword(s):  
Jesus Christ ◽  
Wall Paintings

scholarly journals Controlled enzymatic removal of damaging casein layers on medieval wall paintings

2002 ◽  
Vol 80 (1) ◽  
pp. 13-21 ◽  
Author(s):  
Sascha Beutel ◽  
Kerstin Klein ◽  
Gabi Knobbe ◽  
Peter Königfeld ◽  
Karin Petersen ◽  
...  
Keyword(s):  
Wall Paintings
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