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Lidar Imaging Case Study(with Geometric Distortion Correction)

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Lidar Imaging Case Study(with Geometric Distortion Correction)

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06 Aug 2002 (Updated )

Case study used in Advanced Image Processing seminars (highlights algorithm development)

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Description

Scientists at Brookhaven National Laboratory developed scanning Lidar equipment to detect toxic clouds but they needed application software to pinpoint the size and location of detected plumes. In this case study, MATLAB and the Image Processing Toolbox were used to analyze some raw scan data. Background was removed by ensemble median averaging and image subtraction. Clouds were segmented by statistical based thresholding. Detected clouds were visualized in 2 and 3 dimensions. In order to accurately determine plume dimensions, a model was developed to understand geometric distortions caused by the non-uniform polar coordinate system of the laser scanner. The model, which used spatial transformations, was first validated using a known, synthetic test image to ensure accuracy of the algorithm. The spatial transforms were then used to correct for geometric distortions in actual scan data. With the MATLAB code and example data in this package you can follow the steps used for this application.

Required Products Image Processing Toolbox
MATLAB release MATLAB 6.1 (R12.1)
Other requirements v3.1 or later of Image Processing Toolbox for spatial transforms
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Comments and Ratings (5)
27 Dec 2007 smitha deepak

pls send me the mat lab coding for patches (ie,segment division)at boundary of an image

27 Dec 2007 smitha deepak

pls send me the mat lab coding & explanation for median background subtraction &
foreground graph cut method of an image

22 Mar 2007 souilhac dominique  
29 Apr 2006 mohsen abdi  
31 Oct 2003 wwe addd  
Updates
18 Oct 2002

The original submission was only part of this larger case study

19 Aug 2010

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