A Piecewise Approach to Epipolar Resampling of Pushbroom Satellite Images Based on RPC

Oh, Jaehong; Lee, Won Hee; Toth, Charles K.; Grejner‐Brzezinska, Dorota A.; Lee, Changno

doi:10.14358/pers.76.12.1353

Cited by 39 publications

(37 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An epipolar stereo pair is generated from the raw stereo pair [43,44]. One epipolar image is designated as the reference image, while the other is considered as a secondary image.…”

Section: Disparity Image Productionmentioning

confidence: 99%

“…Results for the epipolar stereo pair cannot be immediately superposed on the raw stereo pair; as the epipolar stereo pair is in epipolar projection, while the raw stereo pair is in geographical projection. Results for the raw stereo pair are obtained when results for the epipolar stereo pair are transformed into a geographical projection [43,44].…”

Section: Spdi Comparisonmentioning

confidence: 99%

See 1 more Smart Citation

A New Stereo Pair Disparity Index (SPDI) for Detecting Built-Up Areas from High-Resolution Stereo Imagery

et al. 2017

View full text Add to dashboard Cite

Within-class spectral variation and between-class spectral confusion in remotely sensed imagery degrades the performance of built-up area detection when using planar texture, shape, and spectral features. Terrain slopes and building heights extracted from auxiliary data, such as Digital Surface Models (DSMs) however, can improve the results. Stereo imagery incorporates height information unlike single remotely sensed images. In this study, a new Stereo Pair Disparity Index (SPDI) for indicating built-up areas is calculated from stereo-extracted disparity information. Further, a new method of detecting built-up areas from stereo pairs is proposed based on the SPDI, using disparity information to establish the relationship between two images of a stereo pair. As shown in the experimental results for two stereo pairs covering different scenes with diverse urban settings, the SPDI effectively differentiates between built-up and non-built-up areas. Our proposed method achieves higher accuracy built-up area results from stereo images than the traditional method for single images, and two other widely-applied DSM-based methods for stereo images. Our approach is suitable for spaceborne and airborne stereo pairs and triplets. Our research introduces a new effective height feature (SPDI) for detecting built-up areas from stereo imagery with no need for DSMs.

show abstract

“…An epipolar stereo pair is generated from the raw stereo pair [43,44]. One epipolar image is designated as the reference image, while the other is considered as a secondary image.…”

Section: Disparity Image Productionmentioning

confidence: 99%

Section: Spdi Comparisonmentioning

confidence: 99%

A New Stereo Pair Disparity Index (SPDI) for Detecting Built-Up Areas from High-Resolution Stereo Imagery

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Unlike the epipolar rectification for the frame camera (Loop and Zhengyou, 1999;Fusiello et al, 2000), the epipolar geometry of the pushbroom sensors for most satellite images is not a straight line on stereo pairs, but a hyperbola (Kim, 2000;Hirschmuller, 2008). Fortunately, because the attitude changes during the collection of a single scene are small, the complicated epipolar geometry can be approximated through some simple functions, including the affine transformation (Wang et al, 2011), the second order polynomial (Oh et al, 2010) or the homographic transformation (de Franchis et al, 2014). After the approximate epipolar rectification, the vertical disparity will be removed.…”

Section: Related Workmentioning

confidence: 99%

Precision 3d Surface Reconstruction From Lro Nac Images Using Semi-Global Matching With Coupled Epipolar Rectification

2017

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

View full text Add to dashboard Cite

ABSTRACT:The Narrow-Angle Camera (NAC) on board the Lunar Reconnaissance Orbiter (LRO) comprises of a pair of closely attached highresolution push-broom sensors, in order to improve the swath coverage. However, the two image sensors do not share the same lenses and cannot be modelled geometrically using a single physical model. Thus, previous works on dense matching of stereo pairs of NAC images would generally create two to four stereo models, each with an irregular and overlapping region of varying size. Semi-Global Matching (SGM) is a well-known dense matching method and has been widely used for image-based 3D surface reconstruction. SGM is a global matching algorithm relying on global inference in a larger context rather than individual pixels to establish stable correspondences. The stereo configuration of LRO NAC images causes severe problem for image matching methods such as SGM, which emphasizes global matching strategy. Aiming at using SGM for image matching of LRO NAC stereo pairs for precision 3D surface reconstruction, this paper presents a coupled epipolar rectification methods for LRO NAC stereo images, which merges the image pair in the disparity space and in this way, only one stereo model will be estimated. For a stereo pair (four) of NAC images, the method starts with the boresight calibration by finding correspondence in the small overlapping stripe between each pair of NAC images and bundle adjustment of the stereo pair, in order to clean the vertical disparities. Then, the dominate direction of the images are estimated by project the center of the coverage area to the reference image and back-projected to the bounding box plane determined by the image orientation parameters iteratively. The dominate direction will determine an affine model, by which the pair of NAC images are warped onto the object space with a given ground resolution and in the meantime, a mask is produced indicating the owner of each pixel. SGM is then used to generate a disparity map for the stereo pair and each correspondence is transformed back to the owner and 3D points are derived through photogrammetric space intersection. Experimental results reveal that the proposed method is able to reduce gaps and inconsistencies caused by the inaccurate boresight offsets between the two NAC cameras and the irregular overlapping regions, and finally generate precise and consistent 3D surface models from the NAC stereo images automatically.

show abstract

“…In contrast to frame cameras, the epipolar geometry of the satellite pushbroom sensors shows different behaviour. The epipolar curves of the pushbroom cameras are not straight and the conjugate pair does not exist (Morgan et al, 2004;Oh et al, 2010;Habib et al, 2005). Therefore, the commonly used techniques for stereo rectification of frame cameras can't be directly applied for rectification of images from pushbroom sensors.…”

Section: Literature Reviewmentioning

confidence: 99%

Satellite Stereo Based Digital Surface Model Generation Using Semi Global Matching in Object and Image Space

Ghuffar

2016

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

View full text Add to dashboard Cite

ABSTRACT:This paper presents methodology and evaluation of Digital Surface Models (DSM) generated from satellite stereo imagery using Semi Global Matching (SGM) applied in image space and georeferenced voxel space. SGM is a well known algorithm, used widely for DSM generation from airborne and satellite imagery. SGM is typically applied in the image space to compute disparity map corresponding to a stereo image pair. As a different approach, SGM can be applied directly to the georeferenced voxel space similar to the approach of volumetric multi-view reconstruction techniques. The matching in voxel space simplifies the DSM generation pipeline because the stereo rectification and triangulation steps are not required. For a comparison, the complete pipeline for generation of DSM from satellite pushbroom sensors is also presented. The results on the ISPRS satellite stereo benchmark using Worldview stereo imagery of 0.5m resolution shows that the SGM applied in image space produce slightly better results than its object space counterpart. Furthermore, a qualitative analysis of the results on Worldview-3 stereo and Pleiades tri-stereo images are presented.

show abstract

A Piecewise Approach to Epipolar Resampling of Pushbroom Satellite Images Based on RPC

Cited by 39 publications

References 4 publications

A New Stereo Pair Disparity Index (SPDI) for Detecting Built-Up Areas from High-Resolution Stereo Imagery

A New Stereo Pair Disparity Index (SPDI) for Detecting Built-Up Areas from High-Resolution Stereo Imagery

Precision 3d Surface Reconstruction From Lro Nac Images Using Semi-Global Matching With Coupled Epipolar Rectification

Satellite Stereo Based Digital Surface Model Generation Using Semi Global Matching in Object and Image Space

Contact Info

Product

Resources

About