Defective CCDs detection and image restoration based on inter-band radiance interpolation for hyperspectral imager

Chen, Ming-Fu; Lai, Jyun-Yi; Lee, Long-Jeng; Huang, Ting-Ming

doi:10.1117/12.869480

Cited by 2 publications

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“…We used hyperspectral images retrieved by the HOPE imager [11] to verify the NN and BL methods, and compared the results of these two methods. The HOPE imager is a push-broom imager developed in our colleagues' previous study.…”

Section: Experimental Datamentioning

confidence: 99%

Pixel Discontinuity Repairing for Push-Broom Orthorectified Images

Lai¹,

Chen²,

Chang³

2013

JSEA

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Pixel discontinuity in orthoimages occurs frequently due to altitude variations in the pitch and heading of an airplane, and low performance of real-time analyzing software. This study proposes a scheme to resolve pixel discontinuity. The proposed scheme includes the following steps: 1) capture images by a self-made hyperspectral imager; 2) determine the pixel locations of orthoimages using a top-down approach; 3) repair discontinuities by the Nearest Neighbor (NN) or Bilinear Interpolation (BL) approaches; and, 4) perform a dynamic range adjustment on the orthoimages, according to the maximum pixel value of the raw images and orthoimages. After applying the proposed scheme, this study found that pixel discontinuity was eliminated by both approaches, and that the software dependability and image quality were improved substantially. In addition, the computational efficiency of the NN approach was roughly two minutes faster than that of the BL due to its simpler computation. However, BL produces smoother image edges for landscapes.

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Section: Experimental Datamentioning

confidence: 99%

Pixel Discontinuity Repairing for Push-Broom Orthorectified Images

Lai¹,

Chen²,

Chang³

2013

JSEA

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“…Airplanes are used to carry high-precision cameras for capturing images; resolution reaches 20 to 50 cm. This study uses the Vegetation and Change Detection imager (VCKi) [8] developed by the Instrument Technology Research Center for aerial photography on major disaster areas. The VCDi-660 system is a high-resolution large-swath multispectral imaging telemetry equipment.…”

Section: Medium-scale Aerial Photographymentioning

confidence: 99%

Application of Near Real-Time and Multiscale Three Dimensional Earth Observation Platforms in Disaster Prevention

Tsai

Chen

Chang

et al. 2011

AUSMT

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Taiwan frequently experiences natural disasters such as typhoons, floods, landslides, debris flows, and earthquakes. Therefore, the instant acquisition of high-definition images and topographic or spatial data of affected areas as disasters occur is crucial for disaster response teams and making emergency aid decisions. The National Applied Research Laboratories has implemented the project “development of near real-time, high-resolution, global earth observation 3D platform for applications to environmental monitoring and disaster mitigation.” This developmental project integrates earth observation techniques, data warehousing, high-performance visualization displays, grids, and disaster prevention technology to establish a near real-time high-resolution three-dimensional (3D) disaster prevention earth observation application platform for Taiwan. The main functions of this platform include (1) integration of observation information, such as Formosat-2 satellite remote sensing, aerial photography, and 3D photography of disaster sites, to provide multidimensional information of the conditions at the affected sites; (2) disaster prevention application technologies, such as large-sized high-resolution 3D projection system, medium-sized active stereo projection systems, and small-sized personal computers with multiscale 3D display systems; (3) a 3D geographical information network platform that integrates data warehousing and cloud services, complies with the Open Geospatial Consortium (OGC) international standard for image data exchange and release processes, and includes image overlaying and added-value analysis of disasters; and (4) near real-time and automated simulation of image processing procedures, which accelerates orthophoto processing once raw data are received from satellites and provides appropriate images for disaster prevention decision-making within 3 to 6 h. This study uses the 88 Flood event of Typhoon Morakot in 2009, Typhoon Fanapi in 2011, and the 311 Earthquake of Japan in 2011 as examples to dissert the applications, functions and features of this platform for supporting disaster response and disaster recovery decision-making

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Defective CCDs detection and image restoration based on inter-band radiance interpolation for hyperspectral imager

Cited by 2 publications

References 0 publications

Pixel Discontinuity Repairing for Push-Broom Orthorectified Images

Pixel Discontinuity Repairing for Push-Broom Orthorectified Images

Application of Near Real-Time and Multiscale Three Dimensional Earth Observation Platforms in Disaster Prevention

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