Article
An automated parallel image registration technique based on the correlation of wavelet features
Appl. Inf. Sci. Branch, NASA Goddard Space Flight Center, Greenbelt, MD
IEEE Transactions on Geoscience and Remote Sensing (impact factor:
2.89).
09/2002;
DOI:10.1109/TGRS.2002.802501
pp.1849 - 1864
Source: IEEE Xplore
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Citations (0)
- Cited In (14)
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Article: Parameterized Hardware Design on Reconfigurable Computers: An Image Processing Case Study
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ABSTRACT: Reconfigurable Computers (RCs) with hardware (FPGA) co-processors can achieve significant performance improvement compared with traditional microprocessor (μP)-based computers for many scientific applications. The potential amount of speedup depends on the intrinsic parallelism of the target application as well as the characteristics of the target platform. In this work, we use image processing applications as a case study to demonstrate how hardware designs are parameterized by the co-processor architecture, particularly the data I/O, i.e., the local memory of the FPGA device and the interconnect between the FPGA and the μP. The local memory has to be used by applications that access data randomly. A typical case belonging to this category is image registration. On the other hand, an application such as edge detection can directly read data through the interconnect in a sequential fashion. Two different algorithms of image registration, the exhaustive search algorithm and the Discrete Wavelet Transform (DWT)-based search algorithm, are implemented on hardware, i.e., Xilinx Vertex-IIPro 50 on the Cray XD1 reconfigurable computer. The performance improvements of hardware implementations are 10× and 2×, respectively. Regarding the category of applications that directly access the interconnect, the hardware implementation of Canny edge detection can achieve 544× speedup.International Journal of Reconfigurable Computing. 01/2010; -
Article: Automatic Registration of Airborne and Spaceborne Images by Topology Map Matching with SURF Processor Algorithm
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ABSTRACT: Image registration is widely used in remote-sensing applications. The existing automatic image registration techniques fall into two categories: Intensity-based and feature-based; the latter (which extracts structures from both images) being more suitable for multi-sensor fusion, detection of temporal changes and image mosaicking. Conventional image registration algorithms have proven to be inaccurate, time-consuming, and unfeasible due to image complexity which makes it cumbersome or even impossible to discern the appropriate control points. In this study, we propose a novel method for automatic image registration based on topology (AIRTop) for change detection and multi‑sensor (airborne and spaceborne) fusion. In this algorithm, we first apply image‑processing methods (SURF—Speeded-Up Robust Features) to extract the landmark structures (roads and buildings) and convert them to a features (vector) map. The following stages are applied in GIS (Geographic Information System), where topology rules, which define the permissible spatial relationships between features, are defined. The relationships between features are established by weight-based topological map-matching algorithm (tMM). The suggested algorithm presents a robust method for image registration. The main focus in this study is on scale and image rotation, when the quality of the scanning system is constant. These seem to offer a good compromise between feature complexity and robustness to commonly occurring deformations. The skew and the anisotropic scaling are assumed to be second-order effects that are covered to some degree by the overall robustness of the sensor.Remote Sensing. 01/2011; -
Article: Improving the Performance of Hyperspectral Image and Signal Processing Algorithms Using Parallel, Distributed and Specialized Hardware-Based Systems.
Signal Processing Systems. 01/2010; 61:293-315.
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Keywords
Atmospheric Administration
comparable accuracies
correlation-based automatic registration algorithm
Cray T3E
critical
digital data
exploiting
high-frequency wavelet features
higher computational speeds
Landsat Thematic Mapper
MasPar MP-2
multiple multiplatform remote
National Oceanic
rotation
single-instruction multiple-data
TM
wavelet coefficients
wavelet decomposition
wavelet-based registration algorithm
work utilizes maxima