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Дата изменения: Thu Dec 2 23:03:11 2010
Дата индексирования: Mon Oct 1 21:39:24 2012
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ij.process
Class FHT

java.lang.Object
  ij.process.ImageProcessor
      ij.process.FloatProcessor
          ij.process.FHT

public class FHT
extends FloatProcessor

This class contains a Java implementation of the Fast Hartley Transform. It is based on Pascal code in NIH Image contributed by Arlo Reeves (http://rsb.info.nih.gov/ij/docs/ImageFFT/). The Fast Hartley Transform was restricted by U.S. Patent No. 4,646,256, but was placed in the public domain by Stanford University in 1995 and is now freely available.

Field Summary

int	originalBitDepth Used by the FFT class.
java.awt.image.ColorModel	originalColorModel Used by the FFT class.
int	originalHeight Used by the FFT class.
int	originalWidth Used by the FFT class.
boolean	quadrantSwapNeeded Used by the FFT class.
ColorProcessor	rgb Used by the FFT class.

Fields inherited from class ij.process.FloatProcessor

pixels8

Fields inherited from class ij.process.ImageProcessor

antialiasedText, baseCM, BICUBIC, BILINEAR, BLACK, BLACK_AND_WHITE_LUT, BLUR_MORE, bLUT1, bLUT2, boldFont, CENTER_JUSTIFY, clipXMax, clipXMin, clipYMax, clipYMin, cm, cm2, CONVOLVE, cTable, cx, cy, defaultColorModel, drawingColor, FIND_EDGES, fmImage, font, fontMetrics, gLUT1, gLUT2, height, histogramMax, histogramMin, histogramSize, image, img, interpolate, interpolationMethod, inversionTested, invertedLut, ISODATA, ISODATA2, justification, LEFT_JUSTIFY, lineWidth, lutAnimation, lutUpdateMode, MAX, maxThreshold, MEDIAN_FILTER, MIN, minMaxSet, minThreshold, NEAREST_NEIGHBOR, newPixels, NO_LUT_UPDATE, NO_THRESHOLD, NONE, OVER_UNDER_LUT, raster, RED_LUT, RIGHT_JUSTIFY, rLUT1, rLUT2, roiHeight, roiWidth, roiX, roiY, sampleModel, snapshotHeight, snapshotWidth, source, width, xMax, xMin, yMax, yMin

Constructor Summary

FHT(ImageProcessor ip)
Constructs a FHT object from an ImageProcessor.

Method Summary

FHT	conjugateMultiply(FHT fht) Returns the image resulting from the point by point Hartley conjugate multiplication of this image and the specified image.
void	dfht3(float[] x, int base, boolean inverse, int maxN) Performs an optimized 1D FHT.
FHT	divide(FHT fht) Returns the image resulting from the point by point Hartley division of this image by the specified image.
ImageStack	getComplexTransform() Converts this FHT to a complex Fourier transform and returns it as a two slice stack.
FHT	getCopy() Returns a clone of this FHT.
ImageProcessor	getPowerSpectrum() Returns an 8-bit power spectrum, log-scaled to 1-254.
void	inverseTransform() Performs an inverse transform, converting this image into the space domain.
FHT	multiply(FHT fht) Returns the image resulting from the point by point Hartley multiplication of this image and the specified image.
boolean	powerOf2Size() Returns true of this FHT contains a square image with a width that is a power of two.
void	rc2DFHT(float[] x, boolean inverse, int maxN) Performs a 2D FHT (Fast Hartley Transform).
void	setShowProgress(boolean showProgress) Enables/disables display of the progress bar during transforms.
void	swapQuadrants() Swap quadrants 1 and 3 and 2 and 4 of the image contained in this FHT.
void	swapQuadrants(ImageProcessor ip) Swap quadrants 1 and 3 and 2 and 4 of the specified ImageProcessor so the power spectrum origin is at the center of the image.
java.lang.String	toString() Returns a string containing information about this FHT.
void	transform() Performs a foreward transform, converting this image into the frequency domain.

Methods inherited from class ij.process.FloatProcessor

abs, add, add, and, applyTable, autoThreshold, convolve, convolve3x3, copyBits, create8BitImage, createImage, createProcessor, crop, dilate, drawPixel, duplicate, erode, exp, fill, fill, filter, findMinAndMax, flipVertical, gamma, get, get, getBackgroundValue, getBicubicInterpolatedPixel, getBufferedImage, getf, getf, getHistogram, getInterpolatedPixel, getMax, getMin, getPixel, getPixel, getPixelInterpolated, getPixels, getPixelsCopy, getPixelValue, getSnapshotPixels, invert, log, max, maxValue, medianFilter, min, minValue, multiply, noise, or, putPixel, putPixel, putPixelValue, reset, reset, resetMinAndMax, resize, rotate, scale, set, set, setBackgroundValue, setColor, setf, setf, setMinAndMax, setPixels, setPixels, setSnapshotPixels, setThreshold, setValue, snapshot, sqr, sqrt, threshold, toFloat, xor

Methods inherited from class ij.process.ImageProcessor

convertToByte, convertToFloat, convertToRGB, convertToShort, draw, drawDot, drawDot2, drawLine, drawOval, drawPolygon, drawRect, drawString, drawString, fill, fillOutside, fillOval, fillPolygon, findEdges, flipHorizontal, getAutoThreshold, getAutoThreshold, getBestIndex, getCalibrationTable, getColorModel, getColumn, getCurrentColorModel, getDefaultColorModel, getFloatArray, getFont, getFontMetrics, getHeight, getHistogramMax, getHistogramMin, getHistogramSize, getIndexSampleModel, getIntArray, getInterpolate, getInterpolatedValue, getInterpolationMethods, getLine, getLineWidth, getLutUpdateMode, getMask, getMaskArray, getMaxThreshold, getMinThreshold, getNChannels, getNeighborhood, getPixelCount, getRoi, getRow, getStatistics, getStringWidth, getWidth, hideProgress, insert, invertLut, isBinary, isColorLut, isDefaultLut, isInvertedLut, isKillable, isPseudoColorLut, lineTo, makeDefaultColorModel, maskSizeError, moveTo, putColumn, putRow, resetBinaryThreshold, resetRoi, resetThreshold, resize, rotateLeft, rotateRight, setAntialiasedText, setAutoThreshold, setAutoThreshold, setAutoThreshold, setBinaryThreshold, setCalibrationTable, setClipRect, setColor, setColorModel, setFloatArray,