image is of type black and white.
image consist of straight as well as curve type.
You can use Image Processing Toolbox in MATLAB
OpenCV is also a great tool, you can find Hough transform theory and samples here:
http://docs.opencv.org/doc/tutorials/imgproc/imgtrans/hough_lines/hough_lines.html
There are toolboxes available in matlab file exchange
Ex: http://in.mathworks.com/matlabcentral/fileexchange/26978-hough-transform-for-circles
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