boofcv.alg.transform.ii

Class GIntegralImageOps

java.lang.Object

boofcv.alg.transform.ii.GIntegralImageOps

public class GIntegralImageOps
extends Object

Provides a mechanism to call IntegralImageOps with unknown types at compile time.

Author:

Peter Abeles

Constructor Summary

Constructors

Constructor and Description
GIntegralImageOps()

Method Summary

Methods

Modifier and Type	Method and Description
static <T extends ImageSingleBand> double	block_unsafe(T integral, int x0, int y0, int x1, int y1) Computes the value of a block inside an integral image without bounds checking.
static <T extends ImageSingleBand> double	block_zero(T integral, int x0, int y0, int x1, int y1) Computes the value of a block inside an integral image and treats pixels outside of the image as zero.
static <T extends ImageSingleBand> T	convolve(T integral, IntegralKernel kernel, T output) General code for convolving a box filter across an image using the integral image.
static <T extends ImageSingleBand> T	convolveBorder(T integral, IntegralKernel kernel, T output, int borderX, int borderY) Convolves the kernel only across the image's border.
static <T extends ImageSingleBand> double	convolveSparse(T integral, IntegralKernel kernel, int x, int y) Convolves a kernel around a single point in the integral image.
static <I extends ImageSingleBand,II extends ImageSingleBand> Class<II>	getIntegralType(Class<I> inputType) Given the input image, return the type of image the integral image should be.
static <I extends ImageSingleBand,T extends ImageSingleBand> T	transform(I input, T transformed) Converts a regular image into an integral image.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

GIntegralImageOps

public GIntegralImageOps()

Method Detail

getIntegralType

public static <I extends ImageSingleBand,II extends ImageSingleBand> Class<II> getIntegralType(Class<I> inputType)

Given the input image, return the type of image the integral image should be.

transform

public static <I extends ImageSingleBand,T extends ImageSingleBand> T transform(I input,
                                                                T transformed)

Converts a regular image into an integral image.

Parameters:

input - Regular image. Not modified.

transformed - Integral image. If null a new image will be created. Modified.

Returns:

Integral image.

convolve

public static <T extends ImageSingleBand> T convolve(T integral,
                                     IntegralKernel kernel,
                                     T output)

General code for convolving a box filter across an image using the integral image.

Parameters:

integral - Integral image.

kernel - Convolution kernel.

output - The convolved image. If null a new image will be declared and returned. Modified.

Returns:

Convolved image.

convolveBorder

public static <T extends ImageSingleBand> T convolveBorder(T integral,
                                           IntegralKernel kernel,
                                           T output,
                                           int borderX,
                                           int borderY)

Convolves the kernel only across the image's border.

Parameters:

integral - Integral image. Not modified.

kernel - Convolution kernel.

output - The convolved image. If null a new image will be created. Modified.

borderX - Size of the image border along the horizontal axis.

borderY - size of the image border along the vertical axis.

convolveSparse

public static <T extends ImageSingleBand> double convolveSparse(T integral,
                                                IntegralKernel kernel,
                                                int x,
                                                int y)

Convolves a kernel around a single point in the integral image.

Parameters:

integral - Input integral image. Not modified.

kernel - Convolution kernel.

x - Pixel the convolution is performed at.

y - Pixel the convolution is performed at.

Returns:

Value of the convolution

block_zero

public static <T extends ImageSingleBand> double block_zero(T integral,
                                            int x0,
                                            int y0,
                                            int x1,
                                            int y1)

Computes the value of a block inside an integral image and treats pixels outside of the image as zero. The block is defined as follows: x0 < x <= x1 and y0 < y <= y1.

Parameters:

integral - Integral image.

x0 - Lower bound of the block. Exclusive.

y0 - Lower bound of the block. Exclusive.

x1 - Upper bound of the block. Inclusive.

y1 - Upper bound of the block. Inclusive.

Returns:

Value inside the block.

block_unsafe

public static <T extends ImageSingleBand> double block_unsafe(T integral,
                                              int x0,
                                              int y0,
                                              int x1,
                                              int y1)

Computes the value of a block inside an integral image without bounds checking. The block is defined as follows: x0 < x <= x1 and y0 < y <= y1.

Parameters:

integral - Integral image.

x0 - Lower bound of the block. Exclusive.

y0 - Lower bound of the block. Exclusive.

x1 - Upper bound of the block. Inclusive.

y1 - Upper bound of the block. Inclusive.

Returns:

Value inside the block.