scholarly journals Concurrent Imaging for TerraSAR-X: Wide-Area Imaging paired with High-Resolution Capabilities

Author(s):  
Thomas Kraus ◽  
Joao Pedro Turchetti Ribeiro ◽  
Markus Bachmann ◽  
Ulrich Steinbrecher ◽  
Christo Grigorov
Author(s):  
D. E. Becker

An efficient, robust, and widely-applicable technique is presented for computational synthesis of high-resolution, wide-area images of a specimen from a series of overlapping partial views. This technique can also be used to combine the results of various forms of image analysis, such as segmentation, automated cell counting, deblurring, and neuron tracing, to generate representations that are equivalent to processing the large wide-area image, rather than the individual partial views. This can be a first step towards quantitation of the higher-level tissue architecture. The computational approach overcomes mechanical limitations, such as hysterisis and backlash, of microscope stages. It also automates a procedure that is currently done manually. One application is the high-resolution visualization and/or quantitation of large batches of specimens that are much wider than the field of view of the microscope.The automated montage synthesis begins by computing a concise set of landmark points for each partial view. The type of landmarks used can vary greatly depending on the images of interest. In many cases, image analysis performed on each data set can provide useful landmarks. Even when no such “natural” landmarks are available, image processing can often provide useful landmarks.


GI_Forum ◽  
2016 ◽  
Vol 4 (1) ◽  
pp. 85-93
Author(s):  
Thomas Bahr ◽  
Philip Smith

Author(s):  
H. Hashiba ◽  
M. Sonobe

Abstract. Continuous heavy rain for a long duration over mountainous terrain, where the elevation is relatively low and the topography is complex leads to multiple small-scale landslides over a wide area. Detailed investigations of small-scale landslides have been effectively carried out using optical high-resolution satellite images with spatial resolution of about 2 m or less. In this study, the sediment-related disaster caused by heavy rain in northern Kyushu, Japan that occurred in July 2017 was selected as a typical example of small-scale landslide. For this landslide event, the applicability of the conventional superpixel segmentation for landslide separation was examined. The applicability of the representative SLIC and SLICO methods in the superpixel segmentation method by image interpretation in the case of a large number of small-scale landslides in a wide area was assessed. These results suggest that in the case of such a disaster, segmentation by the SLICO method will be better. In addition, the set value of the area size for the area division was systematically examined from the distribution tendency of the average NDVI value in the divided area. It was shown that the landslide region can be extracted with relatively high accuracy by the land cover classification process by the NN method by using the appropriate region size examined by the SLICO method.


2015 ◽  
Vol 814 (1) ◽  
pp. 3 ◽  
Author(s):  
Julianne J. Dalcanton ◽  
Morgan Fouesneau ◽  
David W. Hogg ◽  
Dustin Lang ◽  
Adam K. Leroy ◽  
...  

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