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 Aug 27 comment Object separation from a 2.5D surface @zeckra Instead of dealing with geometric models how about defining problem as optimization task and fitting biggest blob or sphere? If I am not mistaken MichaelE2 has related nice solution for 2d circle. Aug 27 revised Object separation from a 2.5D surface added links Aug 27 answered Object separation from a 2.5D surface Aug 25 comment Grid rows height & SpanFromAbove issue Is there any particular reason you didn't put "m" in the first one and what is the expected result? Aug 25 comment Proving (self) similarity with Mathematica - Reccurrence Plots, Similarity Plots etc May be you can use fractal dimensions to measure the similarities. Also related post might help 'Measuring fractal dimension of natural objects from digital images' but mainly for images mathematica.stackexchange.com/questions/13125/… Aug 19 comment Strange behavior of BoundaryMeshRegion I also think it a bug. An easy way to achieve the same result is with r = BoundaryDiscretizeRegion[Cuboid[{4, 4, 4}, {6, 6, 6}]] Jul 23 revised Is there a list of Octave functions mapped to the related Mathematica one? IMAGE PROCESSING topic added with few functions Jul 23 comment Is there a list of Octave functions mapped to the related Mathematica one? @Mr.Wizard Programming wise yes there are many flexibilities in Mathematica and hard to map one by one. However, toolboxes such as image possessing, statistics, wavelets, ect. has very similar commands. It may need a lot of effort to map, but as community page one can improve and add thing as common effort. I personally think it will be quite beneficial for future 2 program users. Jul 15 accepted How to calculate the $H_2$ and $H_\infty$ norms of TransferFunctionModels or StateSpaceModels? Jul 2 awarded Curious Jun 11 comment How to control the layering of graphics displayed with Show you may use Overlay and SetAlphaChannel Overlay[{isosurface, SetAlphaChannel[ Graphics3D[{Black, PointSize[0.05], Point[geom]}, Boxed -> False], .5]}, All, 2] Jun 4 awarded Notable Question May 22 answered Looking for ideas for handling a complicated fitting problem May 17 comment How to count the number of n-gons and line intersections in an image of a complete graph? @GenericUsrnme Do you want image processing solution or graph based solution with Mathematica. you may check mathematica.stackexchange.com/questions/19546/… belisarius's solution for detecting intersection point using image processing solution. For 2d intersection detection algorithms you can check mathematica.stackexchange.com/questions/24211/… for references form this site. May 12 awarded Popular Question May 5 awarded Nice Answer Apr 28 comment Generating x,y coordinates for an edge detection @nikie Overall, nice approach, but I think you need to clean shadows on the left hand side of the image to get it right size (min max includes the shadow :) ). Apr 18 comment Measuring curve length on a binarized image Did you see ComponentMeasurements[im, "PerimeterLength"] ? Apr 15 comment I want to get a special curve in a picture nice to see use of CurvatureFlowFilter. Apr 14 answered Identifying critical points/lines of 2/3D image/cubes