Examples with RankFilters ij.plugin.filter.RankFilters used on opensource projects

Example 1 with RankFilters

use of ij.plugin.filter.RankFilters in project imagingbook-common by imagingbook.

the class BernsenThresholder method getThreshold.

@Override
public ByteProcessor getThreshold(ByteProcessor I) {
    final int M = I.getWidth();
    final int N = I.getHeight();
    ByteProcessor Imin = (ByteProcessor) I.duplicate();
    ByteProcessor Imax = (ByteProcessor) I.duplicate();
    RankFilters rf = new RankFilters();
    rf.rank(Imin, params.radius, RankFilters.MIN);
    rf.rank(Imax, params.radius, RankFilters.MAX);
    int q = (params.bgMode == BackgroundMode.DARK) ? 256 : 0;
    ByteProcessor Q = new ByteProcessor(M, N);
    for (int v = 0; v < N; v++) {
        for (int u = 0; u < M; u++) {
            int gMin = Imin.get(u, v);
            int gMax = Imax.get(u, v);
            int c = gMax - gMin;
            if (c >= params.cmin)
                Q.set(u, v, (gMin + gMax) / 2);
            else
                Q.set(u, v, q);
        }
    }
    return Q;
}

Example 2 with RankFilters

use of ij.plugin.filter.RankFilters in project imagingbook-common by imagingbook.

the class SauvolaThresholder method getThreshold.

@Override
public ByteProcessor getThreshold(ByteProcessor I) {
    FloatProcessor mean = (FloatProcessor) I.convertToFloat();
    FloatProcessor var = (FloatProcessor) mean.duplicate();
    RankFilters rf = new RankFilters();
    rf.rank(mean, params.radius, RankFilters.MEAN);
    Imean = mean;
    rf.rank(var, params.radius, RankFilters.VARIANCE);
    var.sqrt();
    Isigma = var;
    int width = I.getWidth();
    int height = I.getHeight();
    final double kappa = params.kappa;
    final double sigmaMax = params.sigmaMax;
    final boolean darkBg = (params.bgMode == BackgroundMode.DARK);
    ByteProcessor Q = new ByteProcessor(width, height);
    for (int v = 0; v < height; v++) {
        for (int u = 0; u < width; u++) {
            final double sigma = Isigma.getf(u, v);
            final double mu = Imean.getf(u, v);
            final double diff = kappa * (sigma / sigmaMax - 1);
            int q = (int) Math.rint((darkBg) ? mu * (1 - diff) : mu * (1 + diff));
            if (q < 0)
                q = 0;
            if (q > 255)
                q = 255;
            Q.set(u, v, q);
        }
    }
    return Q;
}

Example 3 with RankFilters

use of ij.plugin.filter.RankFilters in project TrakEM2 by trakem2.

the class RankFilter method process.

@Override
public ImageProcessor process(ImageProcessor ip) {
    RankFilters rf = new RankFilters();
    rf.rank(ip, radius, RankFilters.MEDIAN);
    return ip;
}