de.jungblut.reader

Class ImageReader

java.lang.Object

de.jungblut.reader.ImageReader

public final class ImageReader
extends Object

BufferedImage reader that exports the raw bytes as a feature vectors with different encodings.

Author:

thomas.jungblut

Method Summary

Modifier and Type	Method and Description
static List<BufferedImage>	getSlidingWindowPatches(BufferedImage source, int windowWidth, int windowHeight, int verticalStride, int horizontalStride) Calculates subimage windows with the sliding window algorithm.
static de.jungblut.math.DoubleVector	readImageAsGreyScale(BufferedImage img) Returns the given image as a vector, where each dimension is mapped to a given pixel in the image.
static de.jungblut.math.DoubleVector[]	readImageAsLUV(BufferedImage img) Returns the given image as a list of points in space, where each point is encoded by its LUV value.
static de.jungblut.math.DoubleVector[]	readImageAsRGB(BufferedImage img) Returns the given image as a list of points in space, where each point is encoded by its RGB values.

Methods inherited from class java.lang.Object

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

Method Detail

getSlidingWindowPatches

public static List<BufferedImage> getSlidingWindowPatches(BufferedImage source,
                                                          int windowWidth,
                                                          int windowHeight,
                                                          int verticalStride,
                                                          int horizontalStride)

Calculates subimage windows with the sliding window algorithm.

Parameters:

source - the source image to chunk.

windowWidth - the window width.

windowHeight - the window height.

verticalStride - the vertical stride between image offsets.

horizontalStride - the horizontal stride between image offsets.

Returns:

a list of subimages containing the windows, internally pointing to the source image.

readImageAsGreyScale

public static de.jungblut.math.DoubleVector readImageAsGreyScale(BufferedImage img)

Returns the given image as a vector, where each dimension is mapped to a given pixel in the image. The value of each dimension is the greyscaled value that was calculated by averaging the RGB information at each pixel and thus guaranteed to be between 0 and 255.

Parameters:

img - a buffered image.

Returns:

height*width dimensional vector.

readImageAsRGB

public static de.jungblut.math.DoubleVector[] readImageAsRGB(BufferedImage img)

Returns the given image as a list of points in space, where each point is encoded by its RGB values.

Parameters:

img - a buffered image.

Returns:

height*width number of vectors, each vector is 3 dimensional encoded for the RGB of the image.

readImageAsLUV

public static de.jungblut.math.DoubleVector[] readImageAsLUV(BufferedImage img)

Returns the given image as a list of points in space, where each point is encoded by its LUV value. LUV is: L = Luminescence; u = saturation; v = hue angle.

Parameters:

img - a buffered image.

Returns:

height*width number of vectors, each vector is 3 dimensional encoded for the LUV of the image.