Java Code Examples for ij.process.ImageProcessor#fill()
The following examples show how to use
ij.process.ImageProcessor#fill() .
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Example 1
| Source File: GeodesicDistanceMapPluginTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 6 votes |
|
/**
* Test method for {@link inra.ijpb.plugins.GeodesicDistanceMapPlugin#process(ij.ImagePlus, ij.ImagePlus, java.lang.String, short[], boolean)}.
*/
@Test
public void testProcess_Short()
{
ImagePlus maskPlus = IJ.openImage(getClass().getResource("/files/circles.tif").getFile());
ImageProcessor mask = maskPlus.getProcessor();
ImageProcessor marker = mask.duplicate();
marker.fill();
marker.set(30, 30, 255);
ImagePlus markerPlus = new ImagePlus("marker", marker);
GeodesicDistanceMapPlugin plugin = new GeodesicDistanceMapPlugin();
short[] weights = new short[]{3, 4};
ImagePlus mapPlus = plugin.process(markerPlus, maskPlus, "map", weights, true);
ImageProcessor map = mapPlus.getProcessor();
assertEquals(259, map.get(190, 213));
}
Example 2
| Source File: GeodesicDistanceMapPluginTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 6 votes |
|
/**
* Test method for {@link inra.ijpb.plugins.GeodesicDistanceMapPlugin#process(ij.ImagePlus, ij.ImagePlus, java.lang.String, float[], boolean)}.
*/
@Test
public void testProcess_Float()
{
ImagePlus maskPlus = IJ.openImage(getClass().getResource("/files/circles.tif").getFile());
ImageProcessor mask = maskPlus.getProcessor();
ImageProcessor marker = mask.duplicate();
marker.fill();
marker.set(30, 30, 255);
ImagePlus markerPlus = new ImagePlus("marker", marker);
GeodesicDistanceMapPlugin plugin = new GeodesicDistanceMapPlugin();
float[] weights = new float[]{3, 4};
ImagePlus mapPlus = plugin.process(markerPlus, maskPlus, "map", weights, true);
ImageProcessor map = mapPlus.getProcessor();
assertEquals(259, map.getf(190, 213), .01);
}
Example 3
| Source File: DiskStrelTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 6 votes |
|
/**
* Dilates a single pixel by a 3x3 disk, and check the shape of the result.
* The result should be a 3x3 square (approximation of 3x3 disk)
*/
@Test
public void testDilate_SinglePixel_Radius() {
Strel strel = DiskStrel.fromRadius(1);
ImageProcessor image = new ByteProcessor(10, 10);
image.setValue(0);
image.fill();
image.set(5, 5, 255);
ImageProcessor result = strel.dilation(image);
// Check all values inside square
for (int y = 4; y < 7; y++)
for (int x = 4; x < 7; x++)
assertEquals(255, result.get(x, y));
}
Example 4
| Source File: Utils.java From TrakEM2 with GNU General Public License v3.0 | 6 votes |
|
/** Paints an approximation of the pipe into the set of slices. */
static public void paint(final Pipe pipe, final Map<Layer,ImageProcessor> slices, final int value, final float scale) {
final VectorString3D vs = pipe.asVectorString3D();
vs.resample(1); // one pixel
final double[] px = vs.getPoints(0);
final double[] py = vs.getPoints(1);
final double[] pz = vs.getPoints(2);
final double[] pr = vs.getDependent(0);
// For each point
for (int i=0; i<px.length-1; i++) {
final ImageProcessor ip = slices.get(pipe.getLayerSet().getNearestLayer(pz[i]));
if (null == ip) continue;
final OvalRoi ov = new OvalRoi((int)((px[i] - pr[i]) * scale),
(int)((py[i] - pr[i]) * scale),
(int)(pr[i]*2*scale), (int)(pr[i]*2*scale));
ip.setRoi(ov);
ip.setValue(value);
ip.fill(ip.getMask());
}
}
Example 5
| Source File: FloodFillTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 5 votes |
|
@Test
public final void testFloodFill_EmptySquaresC4() {
int[] data = new int[]{
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10,
10, 20, 20, 20, 10, 10, 10, 30, 30, 30, 10,
10, 20, 20, 20, 10, 10, 10, 30, 30, 30, 10,
10, 20, 20, 20, 10, 10, 10, 30, 30, 30, 10,
10, 10, 10, 10, 40, 40, 40, 10, 10, 10, 10,
10, 10, 10, 10, 40, 40, 40, 10, 10, 10, 10,
10, 10, 10, 10, 40, 40, 40, 10, 10, 10, 10,
10, 20, 20, 20, 10, 10, 10, 30, 30, 30, 10,
10, 20, 20, 20, 10, 10, 10, 30, 30, 30, 10,
10, 20, 20, 20, 10, 10, 10, 30, 30, 30, 10,
10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10
};
ImageProcessor image = new ByteProcessor(11, 11);
for (int i = 0; i < 11*11; i++) {
image.set(i, data[i]);
}
// initialize result
ImageProcessor result = new ByteProcessor(11, 11);
result.setValue(255);
result.fill();
// compute flood fill result
FloodFill.floodFill(image, 1, 0, result, 50, 4);
assertEquals(50, result.get(0, 0));
assertEquals(50, result.get(10, 0));
assertEquals(50, result.get(0, 10));
assertEquals(50, result.get(10, 10));
assertEquals(50, result.get(5, 3));
assertEquals(50, result.get(5, 7));
assertEquals(50, result.get(3, 5));
assertEquals(50, result.get(7, 5));
// printImage(result);
}
Example 6
| Source File: OctagonStrelTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 5 votes |
|
private ImageProcessor createImage_Square10x10 () {
ImageProcessor image = new ByteProcessor(30, 30);
image.setValue(0);
image.fill();
for (int y = 10; y < 20; y++) {
for (int x = 10; x < 20; x++) {
image.set(x, y, 255);
}
}
return image;
}
Example 7
| Source File: ShiftedCross3x3Strel_RightTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 5 votes |
|
private ImageProcessor createImage_Square4x4 () {
ImageProcessor image = new ByteProcessor(10, 10);
image.setValue(0);
image.fill();
for (int y = 3; y < 7; y++) {
for (int x = 3; x < 7; x++) {
image.set(x, y, 255);
}
}
return image;
}
Example 8
| Source File: SquareStrelTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 5 votes |
|
/**
* Creates a 30-by-30 image with a 10-by-10 square in the middle.
*/
private ImageProcessor createImage_Square10x10 () {
ImageProcessor image = new ByteProcessor(30, 30);
image.setValue(0);
image.fill();
for (int y = 10; y < 20; y++) {
for (int x = 10; x < 20; x++) {
image.set(x, y, 255);
}
}
return image;
}
Example 9
| Source File: LinearDiagUpStrelTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 5 votes |
|
private ImageProcessor createImage_Square4x4 () {
ImageProcessor image = new ByteProcessor(10, 10);
image.setValue(0);
image.fill();
for (int y = 3; y < 7; y++) {
for (int x = 3; x < 7; x++) {
image.set(x, y, 255);
}
}
return image;
}
Example 10
| Source File: DiskStrelTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 5 votes |
|
/**
* Dilates a single pixel by a disk with diameter 4.
* The result should be larger than dilation with diameter 3.
*/
@Test
public void testDilate_SinglePixel_EvenDiameter() {
Strel disk3 = DiskStrel.fromDiameter(3);
Strel disk4 = DiskStrel.fromDiameter(4);
ImageProcessor image = new ByteProcessor(10, 10);
image.setValue(0);
image.fill();
image.set(5, 5, 255);
ImageProcessor result3 = disk3.dilation(image);
ImageProcessor result4 = disk4.dilation(image);
// Check result3 <= result4
boolean different = false;
for (int y = 0; y < 10; y++)
{
for (int x = 0; x < 10; x++)
{
int res3 = result3.get(x, y);
int res4 = result4.get(x, y);
assertTrue(res3 <= res4);
if (res3 != res4)
{
different = true;
}
}
}
assertTrue(different);
}
Example 11
| Source File: LinearDiagDownStrelTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 5 votes |
|
private ImageProcessor createImage_Square10x10 () {
ImageProcessor image = new ByteProcessor(30, 30);
image.setValue(0);
image.fill();
for (int y = 10; y < 20; y++) {
for (int x = 10; x < 20; x++) {
image.set(x, y, 255);
}
}
return image;
}
Example 12
| Source File: LinearDiagDownStrelTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 5 votes |
|
private ImageProcessor createImage_Square4x4 () {
ImageProcessor image = new ByteProcessor(10, 10);
image.setValue(0);
image.fill();
for (int y = 3; y < 7; y++) {
for (int x = 3; x < 7; x++) {
image.set(x, y, 255);
}
}
return image;
}
Example 13
| Source File: LinearDiagUpStrelTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 5 votes |
|
private ImageProcessor createImage10x15_Square4x4 () {
ImageProcessor image = new ByteProcessor(10, 15);
image.setValue(0);
image.fill();
for (int y = 3; y < 7; y++) {
for (int x = 3; x < 7; x++) {
image.set(x, y, 255);
}
}
return image;
}
Example 14
| Source File: GeodesicReconstructionScanningTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 4 votes |
|
/**
* Test method for {@link ijt.filter.morphology.GeodesicReconstruction#reconstructByErosion()}.
*/
@Test
public void testReconstructByErosion_FloatC4() {
float BG = -42;
float FG = 2500;
float[][] data = new float[][]{
{BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, FG, FG, FG, FG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, FG, FG, FG, FG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, BG, BG, BG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, BG, BG, BG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, FG, FG, FG, FG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, FG, FG, FG, FG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG},
};
int height = data.length;
int width = data[0].length;
ImageProcessor mask = new FloatProcessor(width, height);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
if (data[y][x] == FG)
mask.setf(x, y, BG);
else
mask.setf(x, y, FG);
}
}
ImageProcessor marker = new FloatProcessor(width, height);
marker.setColor(FG);
marker.fill();
marker.setf(2, 3, BG);
GeodesicReconstructionScanning algo = new GeodesicReconstructionScanning(
GeodesicReconstructionType.BY_EROSION, 4);
ImageProcessor result = algo.applyTo(marker, mask);
assertEquals(16, result.getWidth());
assertEquals(10, result.getHeight());
assertEquals(BG, result.getf(2, 8), .01);
assertEquals(BG, result.getf(8, 8), .01);
assertEquals(BG, result.getf(8, 5), .01);
assertEquals(BG, result.getf(14, 8), .01);
assertEquals(FG, result.getf(15, 9), .01);
assertEquals(FG, result.getf(0, 0), .01);
assertEquals(FG, result.getf(5, 3), .01);
assertEquals(FG, result.getf(11, 5), .01);
}
Example 15
| Source File: FloodFillTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 4 votes |
|
@Test
public final void testFloodFillC8Marker() {
int[][] data = new int[][]{
{10, 10, 10, 20, 20, 20, 10, 10, 10, 10, 20, 20, 10, 10, 10},
{10, 10, 20, 20, 20, 20, 20, 20, 10, 20, 20, 20, 20, 10, 10},
{10, 20, 10, 10, 10, 10, 20, 20, 10, 20, 10, 10, 20, 20, 10},
{20, 20, 10, 20, 10, 10, 10, 20, 10, 20, 20, 10, 10, 20, 20},
{20, 20, 10, 20, 10, 10, 10, 20, 10, 10, 10, 20, 10, 20, 20},
{20, 20, 10, 10, 20, 20, 10, 20, 10, 10, 10, 20, 10, 20, 20},
{10, 20, 10, 10, 10, 20, 10, 20, 20, 10, 10, 10, 10, 20, 10},
{10, 20, 10, 20, 20, 20, 10, 20, 20, 20, 20, 20, 20, 20, 10},
{10, 10, 20, 20, 10, 10, 10, 10, 10, 10, 10, 20, 20, 10, 10},
};
int height = data.length;
int width = data[0].length;
ImageProcessor image = new ByteProcessor(width, height);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
image.set(x, y, data[y][x]);
}
}
// initialize empty result image fill with 255
ImageProcessor result = new ByteProcessor(width, height);
result.setValue(255);
result.fill();
// Apply
FloodFill.floodFill(image, 7, 4, result, 50, 8);
// printImage(result);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
if (image.get(x, y) == 20)
assertEquals(50, result.get(x, y));
else
assertEquals(255, result.get(x, y));
}
}
}
Example 16
| Source File: ReconstructionTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 4 votes |
|
/**
* Test method for {@link ijt.filter.morphology.Reconstruction#reconstructByErosion()}.
*/
@Test
public void testReconstructByErosion_C8() {
int BG = 0;
int FG = 255;
int[][] data = new int[][]{
{BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG},
{BG, FG, FG, BG, FG, FG, BG, BG, BG, FG, FG, FG, FG, BG, BG, BG},
{BG, FG, FG, BG, FG, FG, BG, BG, BG, FG, FG, FG, FG, BG, BG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, BG, BG, BG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, BG, BG, BG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, BG, BG, FG, FG, FG, FG, BG, BG, BG, FG, FG, BG, FG, FG, BG},
{BG, BG, BG, FG, FG, FG, FG, BG, BG, BG, FG, FG, BG, FG, FG, BG},
{BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG},
};
int height = data.length;
int width = data[0].length;
ImageProcessor mask = new ByteProcessor(width, height);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
mask.set(x, y, data[y][x]);
}
}
mask.invert();
ImageProcessor marker = new ByteProcessor(width, height);
marker.setColor(255);
marker.fill();
marker.set(2, 3, 0);
ImageProcessor result = Reconstruction.reconstructByErosion(marker, mask, 8);
assertEquals(16, result.getWidth());
assertEquals(10, result.getHeight());
assertEquals(0, result.get(2, 6));
assertEquals(0, result.get(4, 8));
assertEquals(0, result.get(8, 5));
assertEquals(0, result.get(14, 8));
}
Example 17
| Source File: DirectionalFilter.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 4 votes |
|
/**
* Apply directional filter with current settings to the specified image.
*
* @param image
* a grayscale image
* @return the result of directional filter
*/
public ImageProcessor process(ImageProcessor image)
{
// determine the sign of min/max computation
int sign = this.type == Type.MAX ? 1 : -1;
// initialize result
ImageProcessor result = image.duplicate();
if (this.type == Type.MAX)
{
result.setValue(0);
}
else
{
result.setValue(Integer.MAX_VALUE);
}
result.fill();
int sizeX = image.getWidth();
int sizeY = image.getHeight();
fireStatusChanged(this, "Directional Filter...");
// Iterate over the set of directions
for (int i = 0; i < nDirections; i++)
{
fireProgressChanged(this, i, nDirections);
// Create the structuring element for current orientation
double theta = ((double) i) * 180.0 / nDirections;
Strel strel = this.strelFactory.createStrel(theta);
// Apply oriented filter
ImageProcessor oriented = this.operation.apply(image, strel);
// combine current result with global result
for (int y = 0; y < sizeY; y++)
{
for (int x = 0; x < sizeX; x++)
{
float value = oriented.getf(x, y);
if (value * sign > result.getf(x, y) * sign)
{
result.setf(x, y, value);
}
}
}
}
fireProgressChanged(this, 1, 1);
// return the min or max value computed over all orientations
return result;
}
Example 18
| Source File: GeodesicReconstructionScanningTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 4 votes |
|
/**
* Test method for {@link ijt.filter.morphology.GeodesicReconstruction#reconstructByErosion()}.
*/
@Test
public void testReconstructByErosion_FloatC8() {
float BG = -42;
float FG = 2500;
float[][] data = new float[][]{
{BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, FG, FG, FG, FG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, FG, FG, FG, FG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, BG, BG, BG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, BG, BG, BG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, FG, FG, FG, FG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, FG, FG, FG, FG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG},
};
int height = data.length;
int width = data[0].length;
ImageProcessor mask = new FloatProcessor(width, height);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
if (data[y][x] == FG)
mask.setf(x, y, BG);
else
mask.setf(x, y, FG);
}
}
ImageProcessor marker = new FloatProcessor(width, height);
marker.setColor(FG);
marker.fill();
marker.setf(2, 3, BG);
GeodesicReconstructionScanning algo = new GeodesicReconstructionScanning(
GeodesicReconstructionType.BY_EROSION, 8);
ImageProcessor result = algo.applyTo(marker, mask);
assertEquals(16, result.getWidth());
assertEquals(10, result.getHeight());
assertEquals(BG, result.getf(2, 8), .01);
assertEquals(BG, result.getf(8, 8), .01);
assertEquals(BG, result.getf(8, 5), .01);
assertEquals(BG, result.getf(14, 8), .01);
assertEquals(FG, result.getf(15, 9), .01);
assertEquals(FG, result.getf(0, 0), .01);
assertEquals(FG, result.getf(5, 3), .01);
assertEquals(FG, result.getf(11, 5), .01);
}
Example 19
| Source File: GeodesicReconstructionHybridTest.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 4 votes |
|
/**
* Test method for {@link ijt.filter.morphology.GeodesicReconstruction#reconstructByErosion()}.
*/
@Test
public void testReconstructByErosion_FloatC8() {
float BG = -42;
float FG = 2500;
float[][] data = new float[][]{
{BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, FG, FG, FG, FG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, FG, FG, FG, FG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, BG, BG, BG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, BG, BG, BG, BG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, FG, FG, FG, FG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, FG, FG, FG, FG, FG, FG, FG, FG, BG, FG, FG, BG, FG, FG, BG},
{BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG, BG},
};
int height = data.length;
int width = data[0].length;
ImageProcessor mask = new FloatProcessor(width, height);
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
if (data[y][x] == FG)
mask.setf(x, y, BG);
else
mask.setf(x, y, FG);
}
}
ImageProcessor marker = new FloatProcessor(width, height);
marker.setColor(FG);
marker.fill();
marker.setf(2, 3, BG);
GeodesicReconstructionHybrid algo = new GeodesicReconstructionHybrid(
GeodesicReconstructionType.BY_EROSION, 8);
ImageProcessor result = algo.applyTo(marker, mask);
assertEquals(16, result.getWidth());
assertEquals(10, result.getHeight());
assertEquals(BG, result.getf(2, 8), .01);
assertEquals(BG, result.getf(8, 8), .01);
assertEquals(BG, result.getf(8, 5), .01);
assertEquals(BG, result.getf(14, 8), .01);
assertEquals(FG, result.getf(15, 9), .01);
assertEquals(FG, result.getf(0, 0), .01);
assertEquals(FG, result.getf(5, 3), .01);
assertEquals(FG, result.getf(11, 5), .01);
}
Example 20
| Source File: RegionalExtremaByFlooding.java From MorphoLibJ with GNU Lesser General Public License v3.0 | 4 votes |
|
/**
* Computes regional extrema in current input image, using
* flood-filling-like algorithm with 4 connectivity.
* Computations are made with double values.
*/
private ImageProcessor regionalExtremaC4(ImageProcessor image)
{
// get image size
int sizeX = image.getWidth();
int sizeY = image.getHeight();
// allocate memory for output, and fill with 255
ImageProcessor result = new ByteProcessor(sizeX, sizeY);
result.setValue(255);
result.fill();
// initialize local data depending on extrema type
int sign = 1;
if (this.extremaType == ExtremaType.MAXIMA)
{
sign = -1;
}
// Iterate over image pixels
for (int y = 0; y < sizeY; y++)
{
for (int x = 0; x < sizeX; x++)
{
// Check if current pixel was already processed
if (result.getf(x, y) == 0)
continue;
// current value
float currentValue = image.getf(x, y);
// compute extrema value in 4-neighborhood (computes max value
// if sign is -1)
float value = currentValue * sign;
if (x > 0)
value = min(value, image.getf(x-1, y) * sign);
if (y > 0)
value = min(value, image.getf(x, y-1) * sign);
if (x < sizeX - 1)
value = min(value, image.getf(x+1, y) * sign);
if (y < sizeY - 1)
value = min(value, image.getf(x, y+1) * sign);
// if one of the neighbors of current pixel has a lower (resp.
// greater) value, the the current pixel is not an extremum.
// Consequently, the current pixel, and all its connected
// neighbors with same value are set to 0 in the output image.
if (value < currentValue * sign)
{
FloodFill.floodFillFloat(image, x, y, result, 0.f, 4);
}
}
}
return result;
}
