Research Question

How can I compute the Volume and Surface area of 3D objects using an already existing 3D modeling Software ?

Project Investigation3D Model Reconstruction

Construction using 2D images and 3D scan DataVolume and Surface area computation

Technology ReviewSoftware development using existing LibrariesExtension of existing open-source softwareExtension of existing commercial software

Project SpecificationProblems identifiedFunctional and Non-Functional requirements

Project ObjectivesManual segmentation of 3D Human body shape

Extend the functionality of the ParaView software by building a plug-in that computes the surface area of a selected part segment and the whole body Project Specification

Extend the functionality of the ParaView software by building a plug-in that computes the volume of a selected part segment and the whole body either by filling up the model with measured cubes or the Bounding Box technique

Proposed Research Methods

PSEUDOCODE: Volume ComputationSelect number of blocks for each axis

Check input data for block type (Single or multi)

check for length of each dimension and calculate the block size of each dimension

Find distance between each corner of cube and 3D object

Check how many vertices of the cube are in the 3D object

Determine the number of cubes or points inside or outside the 3D object and use this value to compute the volume of the 3D object

Pseudocode: Surface Area Computation

Check input data for block type (Single or multi)

Calculate the number of cells that make up the polygon

Find the three points that make up each triangle cell

Calculate the area of each triangle using Heron’s formula

Calculate the surface area by summing up all the triangle areas

Volume test 1: Regular 3D shape

Volume test 2: 3D Scan data

Volume test 3: 3D Scan data

Surface area test: Regular 3D shape

CONCLUSIONVolume and Surface area computation of 3D objects is possible using existing 3D modeling software (ParaView)Both volume computation methods tend towards the same result but initially produce different levels of accuracy for the same number of cubes. The time taken to compute the volume of a 3D object is directly proportional to the number of cubes within and outside the 3D object. My concluding argument is that the estimate volume derived using the “INSIDE VOLUME METHOD” is more accurate than the estimate volume derived using the “OUTSIDE VOLUME METHOD”.

Challenges & Future workChoosing between programming languagesLearning a scripting language (Python) from scratchKnowledge of Paraview logical framework was requiredInability to predict productivity and time scaleComputing efficiency tradeoff

Writing Volume computation filters in C++Improved end user flexibilityUser manual for filter usage from a “Use case” point of view

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