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Dear all, I creat a 2-D network by method of fractal interpolation to simulate soil cracks. In my program ,plot(x,y) which plots the network , x,y stand for the points' corrdinate value. I want to compute this network's fractal dimension, but I can't get this image from the figure plotted. My quentions are how to get this image in jpg. or bmp.without white blank like the figure, and how to get the binary matrix of this figure. Thanks in advance.
Emily, If you want an image of your cracks, first I'd create a blank image with zeros(). Then I'd go down through every x,y pair that you have using imline() to draw the line (crack) from one point to the next. Now you have your image with all your cracks on it, and you can use export_fig() to write it out to a standard format image file. This will give you just the image alone - no tick marks and titles etc.
However if you want a plot, rather than an image, I'd continue doing it the way you are and then use export_fig() to get the whole plot - including the title, x and y axis labels, tick marks, outer plot area bounding box, etc.
I don't really see how the image of the cracks is going to help you calculate the fractal dimension of the crack network though. I don't use fractals but I though the fractal dimension of a 2D image would look at all the pixel values of all the pixels to give a metric that is kind of related to the "roughness" of the image, but that wouldn't be appropriate to get the fractal dimension of a binary image of a crack network.
getsnap() or getframe(); and then imwrite() or saveas() or print() or use the File Exchange contribution export_fig
You can set the axes background color to something other than white.