- java.lang.Object
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- ij.plugin.filter.FFTFilter
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- All Implemented Interfaces:
Measurements
,PlugInFilter
public class FFTFilter extends java.lang.Object implements PlugInFilter, Measurements
This class implements the Process/FFT/Bandpass Filter command. It is based on Joachim Walter's FFT Filter plugin at "http://imagej.nih.gov/ij/plugins/fft-filter.html". 2001/10/29: First Version (JW) 2003/02/06: 1st bugfix (works in macros/plugins, works on stacks, overwrites image(=>filter)) (JW) 2003/07/03: integrated into ImageJ, added "Display Filter" option (WSR) 2007/03/26: 2nd bugfix (Fixed incorrect calculation of filter from structure sizes, which caused the real structure sizes to be wrong by a factor of 0.75 to 1.5 depending on the image size.)
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Field Summary
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Fields inherited from interface ij.measure.Measurements
ADD_TO_OVERLAY, ALL_STATS, AREA, AREA_FRACTION, CENTER_OF_MASS, CENTROID, CIRCULARITY, ELLIPSE, FERET, INTEGRATED_DENSITY, INVERT_Y, KURTOSIS, LABELS, LIMIT, MAX_STANDARDS, MEAN, MEDIAN, MIN_MAX, MODE, NaN_EMPTY_CELLS, PERIMETER, RECT, SCIENTIFIC_NOTATION, SHAPE_DESCRIPTORS, SKEWNESS, SLICE, STACK_POSITION, STD_DEV
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Fields inherited from interface ij.plugin.filter.PlugInFilter
CONVERT_TO_FLOAT, DOES_16, DOES_32, DOES_8C, DOES_8G, DOES_ALL, DOES_RGB, DOES_STACKS, DONE, FINAL_PROCESSING, KEEP_THRESHOLD, NO_CHANGES, NO_IMAGE_REQUIRED, NO_UNDO, NO_UNDO_RESET, PARALLELIZE_IMAGES, PARALLELIZE_STACKS, ROI_REQUIRED, SNAPSHOT, STACK_REQUIRED, SUPPORTS_MASKING
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Constructor Summary
Constructors Constructor Description FFTFilter()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
run(ImageProcessor ip)
Filters use this method to process the image.int
setup(java.lang.String arg, ImagePlus imp)
This method is called once when the filter is loaded.ImageProcessor
tileMirror(ImageProcessor ip, int width, int height, int x, int y)
Puts ImageProcessor (ROI) into a new ImageProcessor of size width x height y at position (x,y).
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Method Detail
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setup
public int setup(java.lang.String arg, ImagePlus imp)
Description copied from interface:PlugInFilter
This method is called once when the filter is loaded. 'arg', which may be blank, is the argument specified for this plugin in IJ_Props.txt or in the plugins.config file of a jar archive containing the plugin. 'imp' is the currently active image. This method should return a flag word that specifies the filters capabilities.For Plugin-filters specifying the
PlugInFilter.FINAL_PROCESSING
flag, the setup method will be called again, this time with arg = "final" after all other processing is done.- Specified by:
setup
in interfacePlugInFilter
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run
public void run(ImageProcessor ip)
Description copied from interface:PlugInFilter
Filters use this method to process the image. If thePlugInFilter.DOES_STACKS
flag was set, it is called for each slice in a stack. WithPlugInFilter.CONVERT_TO_FLOAT
, the filter is called with the image data converted to a FloatProcessor (3 times per image for RGB images). ImageJ will lock the image before calling this method and unlock it when the filter is finished. For PlugInFilters specifying thePlugInFilter.NO_IMAGE_REQUIRED
flag and not thePlugInFilter.DONE
flag, run(ip) is called once with the argumentnull
.- Specified by:
run
in interfacePlugInFilter
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tileMirror
public ImageProcessor tileMirror(ImageProcessor ip, int width, int height, int x, int y)
Puts ImageProcessor (ROI) into a new ImageProcessor of size width x height y at position (x,y). The image is mirrored around its edges to avoid wrap around effects of the FFT.
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