boofcv.alg.filter.misc

Class AverageDownSampleOps

java.lang.Object

boofcv.alg.filter.misc.AverageDownSampleOps

public class AverageDownSampleOps
extends java.lang.Object

Operations related to down sampling image by computing the average within square regions. The first square region is from (0,0) to (w-1,w-1), inclusive. Each square region after that is found by skipping over 'w' pixels in x and y directions. partial regions along the right and bottom borders are handled by computing the average with the rectangle defined by the intersection of the image and the square region.

NOTE: Errors are reduced in integer images by rounding instead of standard integer division.

Constructor Summary

Constructors

Constructor and Description
AverageDownSampleOps()

Method Summary

Modifier and Type	Method and Description
static void	down(GrayF32 input, int sampleWidth, GrayF32 output) Down samples the image.
static void	down(GrayF64 input, int sampleWidth, GrayF64 output) Down samples the image.
static void	down(GrayS16 input, int sampleWidth, GrayI16 output) Down samples the image.
static void	down(GrayS32 input, int sampleWidth, GrayS32 output) Down samples the image.
static void	down(GrayS8 input, int sampleWidth, GrayI8 output) Down samples the image.
static void	down(GrayU16 input, int sampleWidth, GrayI16 output) Down samples the image.
static void	down(GrayU8 input, int sampleWidth, GrayI8 output) Down samples the image.
static void	down(ImageGray input, int sampleWidth, ImageGray output) Down samples image.
static <T extends ImageGray> void	down(Planar<T> input, int sampleWidth, Planar<T> output) Down samples a planar image.
static <T extends ImageGray> void	down(Planar<T> input, Planar<T> output) Down samples a planar image.
static <T extends ImageBase> void	down(T input, T output) Down samples image.
static int	downSampleSize(int length, int squareWidth) Computes the length of a down sampled image based on the original length and the square width
static void	reshapeDown(ImageBase image, int inputWidth, int inputHeight, int squareWidth) Reshapes an image so that it is the correct size to store the down sampled image

Methods inherited from class java.lang.Object

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

Constructor Detail

AverageDownSampleOps

public AverageDownSampleOps()

Method Detail

downSampleSize

public static int downSampleSize(int length,
                                 int squareWidth)

Computes the length of a down sampled image based on the original length and the square width

Parameters:

length - Length of side in input image

squareWidth - Width of region used to down sample images

Returns:

Length of side in down sampled image

reshapeDown

public static void reshapeDown(ImageBase image,
                               int inputWidth,
                               int inputHeight,
                               int squareWidth)

Reshapes an image so that it is the correct size to store the down sampled image

down

public static void down(ImageGray input,
                        int sampleWidth,
                        ImageGray output)

Down samples image. Type checking is done at runtime.

Parameters:

input - Input image. Not modified.

sampleWidth - Width of square region.

output - Output image. Modified.

down

public static <T extends ImageBase> void down(T input,
                                              T output)

Down samples image. Type checking is done at runtime.

Parameters:

input - Input image. Not modified.

output - Output image. Modified.

down

public static <T extends ImageGray> void down(Planar<T> input,
                                              int sampleWidth,
                                              Planar<T> output)

Down samples a planar image. Type checking is done at runtime.

Parameters:

input - Input image. Not modified.

sampleWidth - Width of square region.

output - Output image. Modified.

down

public static <T extends ImageGray> void down(Planar<T> input,
                                              Planar<T> output)

Down samples a planar image. Type checking is done at runtime.

Parameters:

input - Input image. Not modified.

output - Output image. Modified.

down

public static void down(GrayU8 input,
                        int sampleWidth,
                        GrayI8 output)

Down samples the image.

Parameters:

input - Input image. Not modified.

sampleWidth - Width of square region.

output - Output image. Modified.

down

public static void down(GrayS8 input,
                        int sampleWidth,
                        GrayI8 output)

Down samples the image.

Parameters:

input - Input image. Not modified.

sampleWidth - Width of square region.

output - Output image. Modified.

down

public static void down(GrayU16 input,
                        int sampleWidth,
                        GrayI16 output)

Down samples the image.

Parameters:

input - Input image. Not modified.

sampleWidth - Width of square region.

output - Output image. Modified.

down

public static void down(GrayS16 input,
                        int sampleWidth,
                        GrayI16 output)

Down samples the image.

Parameters:

input - Input image. Not modified.

sampleWidth - Width of square region.

output - Output image. Modified.

down

public static void down(GrayS32 input,
                        int sampleWidth,
                        GrayS32 output)

Down samples the image.

Parameters:

input - Input image. Not modified.

sampleWidth - Width of square region.

output - Output image. Modified.

down

public static void down(GrayF32 input,
                        int sampleWidth,
                        GrayF32 output)

Down samples the image.

Parameters:

input - Input image. Not modified.

sampleWidth - Width of square region.

output - Output image. Modified.

down

public static void down(GrayF64 input,
                        int sampleWidth,
                        GrayF64 output)

Down samples the image.

Parameters:

input - Input image. Not modified.

sampleWidth - Width of square region.

output - Output image. Modified.