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
Cite this paper
J. Lai, M. Chen and H. Chang, "Pixel Discontinuity Repairing for Push-Broom Orthorectified Images," Journal of Software Engineering and Applications, Vol. 6 No. 4, 2013, pp. 24-29. doi: 10.4236/jsea.2013.64A004.
 W. Mayr and C. Heipke, “A Contribution to Digital Orthophoto Generation,” International Archives of Photogrammetry and Remote Sensing, Vol. 27, No. B11, 1988, pp. 430-439.
 L. C. Chen and L. H. Lee, “Rigorous Generation of Digital Orthophotos from SPOT Images,” Photogrammetric Engineering & Remote Sensing, Vol. 59, No. 5, 1993, pp. 655-661.
 J. Allebach and P. W. Wong, “Edge-Directed Interpolation,” Proceedings of International Conference on Image Processing, Vol. 3, 1996, pp. 707-710.
 C. F. Lee and Y. L. Huang, “An Efficient Image Interpolation Increasing Payload in Reversible Data Hiding,” Expert Systems with Applications, Vol. 39, No. 15, 2012, pp. 6712-6719. doi:10.1016/j.eswa.2011.12.019
 Q. Tang, G. Y. Zhang, G. R. Liu, Z. H. Zhong and Z. C. He, “An Efficient Adaptive Analysis Procedure Using the Edgebased Smoothed Point Interpolation Method (ESPIM) for 2D and 3D Problems,” Engineering Analysis with Boundary Elements, Vol. 36, No. 9, 2012, pp. 1424-1443. doi:10.1016/j.enganabound.2012.03.007
 R. S. V. Teegavarapu, T. Meskele and C. S. Pathak, “GeoSpatial Grid-Based Transformations of Precipitation Estimates Using Spatial Interpolation Methods,” Computers & Geosciences, Vol. 40, 2012, pp. 28-39.
 R. J. Aspinall, W. A. Marcus and J. W. Boardman, “Considerations in Collecting, Processing, and Analyzing High Spatial Resolution Hyperspectral Data for Environmental Investigations,” Geograph System, Vol. 4, No. 1, 2002, pp. 15-29.
 E. Puckrin, C. S. Turcotte, P. Lahaie, D. Dubé, V. Farley, P. Lagueux, F. Marcotte and M. Chamberland, “Airborne Infrared-Hyperspectral Mapping for Detection of Gaseous and Solid Targets,” Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XI, Vol. 7665, 2010, 10 Pages.
 J. Liu, Y. S. Zhang, D. H. Wang and W. M. Xu, “Geometric Rectification of Airborne Linear Array Pushbroom Imagery Supported by INS/DGPS System,” Journal of Remote Sensing, Vol. 10, No. 1, 2006, pp. 21-26.
 V. A. Grishin, “Accuracy of Measuring Camera Position by Marker Observation,” Journal of Software Engineering and Applications, Vol. 3, No. 10, 2010, pp. 906-913.
 M. F. Chen, J. Y. Lai, L. J. Lee and T. M. Huang, “Defective CCDs Detection and Image Restoration Based on Inter-Band Radiance Interpolation for Hyperspectral Imager,” Proceeding of SPIE Asia-Pacific REMOTE Sensing, Vol. 7857, 2010, Article ID: 78570W, 12 Pages.