boofcv.alg.transform.ii

Class GIntegralImageOps

java.lang.Object

boofcv.alg.transform.ii.GIntegralImageOps

public class GIntegralImageOps
extends java.lang.Object

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

Constructor Summary

Constructors

Constructor and Description
GIntegralImageOps()

Method Summary

Modifier and Type	Method and Description
static <T extends ImageGray> 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 ImageGray> 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 ImageGray> 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 ImageGray> T	convolveBorder(T integral, IntegralKernel kernel, T output, int borderX, int borderY) Convolves the kernel only across the image's border.
static <T extends ImageGray> double	convolveSparse(T integral, IntegralKernel kernel, int x, int y) Convolves a kernel around a single point in the integral image.
static <I extends ImageGray,II extends ImageGray> java.lang.Class<II>	getIntegralType(java.lang.Class<I> inputType) Given the input image, return the type of image the integral image should be.
static <I extends ImageGray,T extends ImageGray> T	transform(I input, T transformed) Converts a regular image into an integral image.

Methods inherited from class java.lang.Object

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

Constructor Detail

GIntegralImageOps

public GIntegralImageOps()

Method Detail

getIntegralType

public static <I extends ImageGray,II extends ImageGray> java.lang.Class<II> getIntegralType(java.lang.Class<I> inputType)

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

transform

public static <I extends ImageGray,T extends ImageGray> 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 ImageGray> 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 ImageGray> 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 ImageGray> 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 ImageGray> 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 ImageGray> 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.