Preprocessing Class Reference

vmtkPreprocessing is a Class that estimate <histogram> <gradient> and <distance transform>=""> from discrete volume data. In this approach, the gradient vector is pre-computed while the data is being loaded, before the rendition. More...

#include <vmtkPreprocessing.h>

Collaboration diagram for Preprocessing:

List of all members.

Public Member Functions
	Preprocessing (DCMDataType *rawData)
	~Preprocessing ()
void	Compute1DHistogram (DCMDataType *data)
int	DistanceToEdge (int x, int xMax, int y, int yMax, int z, int zMax)
Static Public Member Functions
static UINT32	NameEncode (int x, int y, int z)
static void	NameDecode (UINT32 id, int *x, int *y, int *z)

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Detailed Description

vmtkPreprocessing is a Class that estimate <histogram> <gradient> and <distance transform>=""> from discrete volume data. In this approach, the gradient vector is pre-computed while the data is being loaded, before the rendition.

The gradient vector uses additional <volume texture>=""> that is sampled at runtime.

We use the gradient magnitude for generate a 2D Transfer Function and the gradient vector should be used for volume illumination in GPU-based volume rendering.

Note:

The parameter of constructor is pointer to raw data. If exist the pre-computed gradient file, the file is loaded, otherwise, the gradient is computed based on <Central differences="" method>="">.

Author:

Jose Elias Yauri Vidalon

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Constructor & Destructor Documentation

Preprocessing::Preprocessing

(

DCMDataType *

rawData

)

Constructor

Find maximum scalar value into volume data

Compute 1D Histogram

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Preprocessing::~Preprocessing

(

)

Destructor

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Member Function Documentation

void Preprocessing::Compute1DHistogram

(

DCMDataType *

data

)

Compute Histogram 1D of Volume Data

Compute 1D Histogram

Find the Max and Min, except data in [zero]

Normalize 1D Histogram to [0,1]

Save 1D Histogram

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The documentation for this class was generated from the following files:

• src/vmtkPreprocessing.h
• src/vmtkPreprocessing.cpp