• Title/Summary/Keyword: 번들 조정

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Bundle Adjustment of KOMPSAT-3A Strip Based on Rational Function Model (Rational Function Model 기반 KOMPSAT-3A 스트립 번들조정)

  • Yoon, Wansang;Kim, Taejung
    • Korean Journal of Remote Sensing
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    • v.34 no.3
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    • pp.565-578
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    • 2018
  • In this paper, we investigate the feasibility of modelling image strips, instead of individual scenes, that have been acquired from the same orbital pass through the process of bundle adjustments. Under this approach, First, a rational function model (RFM) of the strip image is generated from the RFMs of individual images, such that the entire strip of images can be treated as a single image. Correction parameters are calculated through bundle adjustments between strip images. For the experiment, we used two stereo strips. Each strip image consists of three KOMPSAT-3A scenes. Experimental results show that it was possible to improve the initial model by using the control points located in a specific region of the strip. We showed that absolute orientation with moderate accuracy of 2 m errors were achieved from 12 ground control points for the three-image strips. The test results indicate that bundle adjustment of strip images could be more efficient than bundle adjustments of the individual scenes.

Investigation on the Accuracy of bundle Adjustments and Exterior Orientation Parameter Estimation of Linear Pushbroom Sensor Models (선형 푸시브룸 센서모델의 번들조정 정확도 및 외부표정요소추정 정확도 분석)

  • Kim Tae Jung
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.23 no.2
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    • pp.137-145
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    • 2005
  • In this paper, we investigate the accuracy of various sensor models developed for linear pushbroom satellite images. We define the accuracy of a sensor model in two aspects: the accuracy of bundle adjustments and the accuracy of estimating exterior orientation parameters. The first accuracy has been analyzed and reported frequently whereas the second accuracy has somewhat been neglected. We argue that the second accuracy is as important as the first one. The second accuracy describes a model's ability to predict satellite orbit and attitude, which has many direct and indirect applications. Analysis was carried out on the traditional collinearity-based sensor models and orbit-based sensor models. Collinearity-based models were originally developed for aerial photos and modified for linear pushbroom-type satellite images. Orbit-based models have been used within satellite communities for satellite control and orbit determination. Models were tested with two Kompsat-1 EOC scenes and GPS-driven control points. Test results showed that orbit-based models produced better estimation of exterior orientation parameters while maintained comparable accuracy on bundle adjustments.

A Study on Bundle Block Adjustment with Additional Parameters (부가매개변수(附加媒介變數)를 고려(考慮)한 번들블럭조정(調整)에 관(關)한 연구(硏究))

  • Yeu, Bock Mo;Kwon, Hyon;Lee, Hyun Jik;Jeong, Soo
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.10 no.4
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    • pp.87-94
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    • 1990
  • In this study, the block adjustments are perfomed by bundle adjustment method of analytical photogrammetry, and the characteristics of 3-dimensional errors for the objects are analysed. The optimal arrangement and configuration of the control points is selected from various arrangements and configurations of control points, and the accuracies of result obtained by block adjustment and by single model adjustment are compared, And the accuracy of bundle block adjustment is compared with that of the independent model triangulation which is another method in block adjustment with additional parameters by selecting the suitable systematic error model. As a result of this study, an the effective method to improve accuracy in close-range photogrammetry was presented by forming blocks and using bundle block adjustment with proper arrangement and configuration of control poinst.

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Accuracy Evaluation by GCP Acqusition Methods in Bundle Adjustment (SPOT 영상용 번들조정에서 지상기준점의 획득방법에 따른 정확도 분석)

  • Yeu, Bock Mo;Lee, Hyun Jik;Park, Hong Gi
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.11 no.4
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    • pp.163-170
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    • 1991
  • The 3 dimensional point positioning from SPOT imagery is performed by bundle adjustment methods of analytical and digital photogrammetry, and need the precise determination of image coordinates and accurate coordinates of ground control points. In this study, the authors analysed the digitized planimetric accuarcy and height accuracy of topographic maps in comparison with accurate coordinates by coordinates resulted by bundle adjustment in each cases between different acquisition method of ground control point coordinates and formats of SPOT imagery.

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A STUDY ON THE GROSS ERROR DETECTION AND ELIMINATION IN BUNDLE BLOCK ADJUSTMENT (번들블럭조정에 있어서 과대오차 탐색 및 제거에 관한 연구)

  • 유복모;조기성;신성웅
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.9 no.1
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    • pp.47-54
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    • 1991
  • In this study, the accuracy of three dimensional location was improved by self calibration bundle method with additional parameter, which is to correct systematic error through detection and elimination of the gross error from updated reference variance for observation values in photogram-metry. In this study, with the result of comparing accuracy of each method, correcting systematic error is more effective after gross error detection and when observation values are contained more than two gross error the point with maximum correlation value is detected by masking effect of least square adjustment.

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Fast Sequential Bundle Adjustment Algorithm for Real-time High-Precision Image Georeferencing (실시간 고정밀 영상 지오레퍼런싱을 위한 고속 연속 번들 조정 알고리즘)

  • Choi, Kyoungah;Lee, Impyeong
    • Korean Journal of Remote Sensing
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    • v.29 no.2
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    • pp.183-195
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    • 2013
  • Real-time high-precision image georeferencing is important for the realization of image based precise navigation or sophisticated augmented reality. In general, high-precision image georeferencing can be achieved using the conventional simultaneous bundle adjustment algorithm, which can be performed only as post-processing due to its processing time. The recently proposed sequential bundle adjustment algorithm can rapidly produce the results of the similar accuracy and thus opens a possibility of real-time processing. However, since the processing time still increases linearly according to the number of images, if the number of images are too large, its real-time processing is not guaranteed. Based on this algorithm, we propose a modified fast algorithm, the processing time of which is maintained within a limit regardless of the number of images. Since the proposed algorithm considers only the existing images of high correlation with the newly acquired image, it can not only maintain the processing time but also produce accurate results. We applied the proposed algorithm to the images acquired with 1Hz. It is found that the processing time is about 0.02 seconds at the acquisition time of each image in average and the accuracy is about ${\pm}5$ cm on the ground point coordinates in comparison with the results of the conventional simultaneous bundle adjustment algorithm. If this algorithm is converged with a fast image matching algorithm of high reliability, it enables high precision real-time georeferencing of the moving images acquired from a smartphone or UAV by complementing the performance of position and attitude sensors mounted together.

Reliability Analysis of the Three-Dimensional Deformation Measurement by Terrestrial Photogrammetry (지상사진(地上寫眞)에 의한 삼차원변형측량(三次元變形測量)의 신뢰도(信賴度) 분석(分析)(기일(其一)))

  • Yeu, Bock Mo;Yoo, Hwan Hee;Kim, In Sub
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.7 no.4
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    • pp.139-146
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    • 1987
  • The 3-dimensional deformation measurement by the terrestrial photogrammetry is consist of 3-dimensional coordinates computation, displaced point detection and deformation estimation of object targets. In this study, at the first step of deformation analysis, the variation of the variance-covariance matrix for the exterior orientation elements was analyzed by the increment of the ground control points and the photos in the Bundle adjustment. And then, to give the constraints for improving accuracy of ground control points, the concept of Free-Network adjustment was applied to Bundle adjustment. As a result, we knew that it was desired in the accuracy and the economy, the observation time when the numbers of ground control point and photo were respectively 6 points and 3 photos. In addition, in the case of applying the concept of Free Network adjustment in Bundle adjutment, it was desirable that the space distance for the constraints is distributed outside.

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Accuracy Analysis of Photogrammetric Techniques for Numerical Cadastral Surveying (수치지적(數値地籍) 측량(測量)을 위한 사진측량기법(寫眞測量技法)의 정확도(正確度) 분석(分析))

  • Yeu, Bock Mo;Yoo, Hwan Hee
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.10 no.1
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    • pp.109-113
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    • 1990
  • In the land boundary surveying related to the real-estate problem, numerical cadastral surveying techniques are now widely required for the accuracy improvement. In this paper, the photogrammetric techniques in order to improve the accuracy of numerical cadastral surveying were investigated, Independent Model Triangulation, Bundle Adjustment, and Bundle Adjustment with additional parameters were compared and analyzed to propose the method for the more reliable and accurate results in numerical cadastral surveying.

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Study on the Improvement of Accuracy in a Plain Slope Analysis Using the Bundle Adjustment (번들조정법에 의한 지상시설물 경사면 해석의 정확도 향상에 관한 연구)

  • 유복모;조기성;허두홍
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.7 no.1
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    • pp.59-65
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    • 1989
  • In this study, improvement of accuracy in a plain slope analysis is a main object using the bundle adjustment with changing the convergent angles and the configurations of control points when we can't take convergent case because of poor environment around establishment and cultural assets. From converged photographing using the angle of deviation, it was possible to improve accuracy in a plain slope analysis.

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Comparison of Position-Rotation Models and Orbit-Attitude Models with SPOT images (SPOT 위성영상에서의 위치-회전각 모델과 궤도-자세각 모델의 비교)

  • Kim Tae-Jung
    • Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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    • v.24 no.1
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    • pp.47-55
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    • 2006
  • This paper investigates the performance of sensor models based on satellite position and rotation angles and sensor models based on satellite orbit and attitude angles. We analyze the performance with respect to the accuracy of bundle adjustment and the accuracy of exterior orientation estimation. In particular, as one way to analyze the latter, we establish sensor models with respect to one image and apply the models to other scenes that have been acquired from the same orbit. Experiment results indicated that fer the sole purpose of bundle adjustment accuracy one could use both position-rotation models and orbit-attitude models. The accuracy of estimating exterior orientation parameters appeared similar for both models when analysis was performed based on single scene. However, when multiple scenes within the same orbital segment were used for analysis, the orbit-attitude model with attitude biases as unknowns showed the most accurate results.