2d to 3d

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dhanalakshmi
dhanalakshmi 2012-1-24
hi i have segmented the image, which is 2d. i need to find the volume of the segmented part .is there any way to convert 2d to 3d .?matlab code r any other softwares.? pls help me.give me any idea pls.
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Walter Roberson
Walter Roberson 2012-1-24
Does the value at each point indicate the z coordinate?

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回答（2 个）

Image Analyst
Image Analyst 2012-1-24
Why not just sum up the area of all the slices? Would that be good enough, accurate enough for you?
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Walter Roberson
Walter Roberson 2012-1-24
If the matrix values represent z coordinates, then something like the extension of the trapezoidal rule to 2D would probably be more accurate.

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tudor dima
tudor dima 2012-2-23
You might want to visualize your 2D sequence in 3D, then decide. Trapezoidal rule is the fastest to write and run. In case you have a lot of misalignment then a little smoothing can help.
Worst case, integrate the Heaviside function which takes as argument the signed distance of each point to the in-out interface :-) It's rather convoluted but the functions are on the exchange and the results are the most precise one can get at a given resolution.

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