Comparing geometric and radiometric information from GeoEye-1 and WorldView-2 multispectral imagery

Aguilar, Manuel A.; Saldaña, María del Mar; Aguilar, Fernando J.; Lorca, Andrés García

doi:10.5721/eujrs20144741

Cited by 8 publications

(5 citation statements)

References 26 publications

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“…A RMSE of 1.9 m is still above the 1.2 m resolution of the WV-3 multispectral data. Earlier experience shows that with better reference data, errors can be reduced to less than a pixel (Aguilar, et al, 2014). As no systematic pattern was visible in the WV-3 checkpoint residuals, we assume that the difficulties encountered in manual GCP selection and the accuracy of the NAIP imagery and NED DEM are the limiting factors.…”

Section: Comparison With Worldview-3 Datamentioning

confidence: 76%

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Skybox image and video product evaluation

d’Angelo

Máttyus

Reinartz

2015

International Journal of Image and Data Fusion

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Skybox Imaging launched the SkySat 1 & 2 satellites in 2013 and 2014. They are small and low cost satellites, capable of recording still images with sub-meter resolution and high definition video for up to 90 seconds of a single target, using a novel focal plane with three 5.5 mega pixel frame sensors. To improve resolution and signal-to-noise ratio of the still imagery, multiple frames are fused with superresolution image merging. This article evaluates the SkySat image quality and georeferencing performance. For comparison, Worldview-3 data acquired over the same AOI is evaluated using the same procedure and reference data. Results show that georeferencing of SkySat still imagery products requires more ground control than other VHR sensors. Results from the Las Vegas video show that speed of moving vehicles in videos can be detected to better than 0.8 mph and that automatic motion detection can be used to georeference videos to street vector databases. Generation of digital surface models from video show a height accuracy of 1.2 meters (NMAD).

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Section: Comparison With Worldview-3 Datamentioning

confidence: 76%

“…However, special calibration acquisitions are usually not available. Often, methods based on detecting homogeneous areas or edge features are used for this purpose (d 'Angelo, et al, 2014;Aguilar, et al, 2014).…”

Section: Radiometric Qualitymentioning

confidence: 99%

Skybox image and video product evaluation

d’Angelo

Máttyus

Reinartz

2015

International Journal of Image and Data Fusion

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“…( 2) Continue taking measurements between the GCPs from each image for distortion correction. (3) Proceed with the correction of distorted images by matching the measured GCPs [12]. At least four GCPs must be included in each image to perform distortion correction; however, to increase the accuracy of the distorted images, a total of 174 GCPs were surveyed from onshore and offshore areas for image distortion correction as shown in Figure 4: 87 GCPs from onshore and offshore, separately.…”

Section: Survey and Measurements For The Numerical Simulation Datamentioning

confidence: 99%

Analysis of Rip Current Characteristics Using Dye Tracking Method

Kim

2021

Atmosphere

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Rip currents are strong water channels flowing away from the shoreline. They can occur on any shore with breaking waves. Rip currents play a significant role in changing the topography of shallow water regions by transporting large amounts of bed material offshore. Moreover, they pose a significant danger for people living in nearshore zones and surfers and cause hundreds of deaths annually worldwide. Therefore, rip current generation characteristics have been investigated to prevent casualties. In this study, a GPS drifter survey was chosen as the investigation method; however, a few drawbacks were discovered, such as low accuracy due to the GPS drifter becoming trapped in the surf zone. Therefore, drones and dyes were used to overcome the drawbacks of drifter methods. The results of dye tracking and the 3D wave-induced current numerical simulation were compared; the velocity and formation of the rip current were found to be relatively similar. With the technological advancements and invention of new survey equipment, the survey techniques also evolve, and this paper shows that the disadvantages of the GPS-based Lagrangian method can be overcome using a dye-mounted drone, which observes the rip current easily and accurately.

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“…Under the condition of GCPs, the positioning accuracy of WV2 stereo-pair can be greatly improved. For instance, two evenly distributed GCPs can improve planimetric accuracy from 4.1 m CE90% to 1.5 m CE90% (Aguilar, Saldana, Aguilar, & Lorca, 2014).…”

Section: Other Errorsmentioning

confidence: 99%

Shallow water bathymetry from WorldView-2 stereo imagery using two-media photogrammetry

Cao

Fang

Jiang

et al. 2019

European Journal of Remote Sensing

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Two-media photogrammetry appears to be a useful technology for mapping shallow water depth. The objective of this paper is to explore the feasibility of shallow water bathymetry using satellite two-media photogrammetry. This paper presents a two-media photogrammetry technique for WorldView-2 stereo multispectral imagery. In this method, near-infrared band is used for sun glint elimination. A combination of Scale Invariant Feature Transform and Semi-Global Matching algorithm is adopted for dense stereo matching. Rational Function Model is applied for raw Digital Elevation Model generation and the water surface elevation is determined by interpolating water edge elevation. Finally, the approximate refraction correction model is adopted in the water region to correct the vertical coordinate offsets. Our experimental results of Ganquan Island and Zhaoshu Island show that a reasonable depth estimate with relative error less than 17% and 14% can be obtained for the water depth range between 5 and 20 m, and the root-mean-square error are 2.09 m and 1.76 m, respectively. However, less accurate estimate is found for the very shallow water depth range between 0 and 5 m. The overall accuracy of satellite two-media photogrammetry is at the same level with the traditional multispectral-based model for bottom depth retrieval. ARTICLE HISTORY

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Comparing geometric and radiometric information from GeoEye-1 and WorldView-2 multispectral imagery

Cited by 8 publications

References 26 publications

Skybox image and video product evaluation

Skybox image and video product evaluation

Analysis of Rip Current Characteristics Using Dye Tracking Method

Shallow water bathymetry from WorldView-2 stereo imagery using two-media photogrammetry

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