void adjustMaxBri(int value) {
   maxBri = value;
   if (minBri > maxBri) {
     minBri = maxBri;
     minSlider3.setValue((int) minBri);
   }
 }
 void adjustMaxSat(int value) {
   maxSat = value;
   if (minSat > maxSat) {
     minSat = maxSat;
     minSlider2.setValue((int) minSat);
   }
 }
 void adjustMinBri(int value) {
   minBri = value;
   if (maxBri < minBri) {
     maxBri = minBri;
     maxSlider3.setValue((int) maxBri);
   }
 }
 void adjustMinSat(int value) {
   minSat = value;
   if (maxSat < minSat) {
     maxSat = minSat;
     maxSlider2.setValue((int) maxSat);
   }
 }
 void adjustMaxHue(int value) {
   maxHue = value;
   if (minHue > maxHue) {
     minHue = maxHue;
     minSlider.setValue((int) minHue);
   }
 }
 void adjustMinHue(int value) {
   minHue = value;
   if (maxHue < minHue) {
     maxHue = minHue;
     maxSlider.setValue((int) maxHue);
   }
 }
 void updateScrollBars() {
   minSlider.setValue((int) minHue);
   maxSlider.setValue((int) maxHue);
   minSlider2.setValue((int) minSat);
   maxSlider2.setValue((int) maxSat);
   minSlider3.setValue((int) minBri);
   maxSlider3.setValue((int) maxBri);
 }
    void sample() {
      byte[] hsSource, ssSource, bsSource;
      // ImageProcessor ip2;
      // ip2 = imp.getProcessor();
      Rectangle myroi = ip.getRoi();
      int swidth = myroi.width;
      int sheight = myroi.height;
      int sy = myroi.y;
      int sx = myroi.x;
      if (swidth == width && sheight == height) {
        IJ.showMessage("Select a rectangular ROI");
        IJ.beep();
        return;
      }

      IJ.run("Select None");

      int snumPixels = swidth * sheight;

      hsSource = new byte[snumPixels];
      ssSource = new byte[snumPixels];
      bsSource = new byte[snumPixels];

      int[] pixs = new int[snumPixels];
      int[] bin = new int[256];

      int counter = 0, pi = 0, rangePassH = 0, rangeStopH = 0, rangePassL = 0, rangeStopL = 0, i, j;

      for (i = sy; i < sy + sheight; i++) {
        for (j = sx; j < sx + swidth; j++) {
          pixs[counter++] = ip.getPixel(j, i);
        }
      }

      // Get hsb or rgb from roi.
      ColorProcessor cp2 = new ColorProcessor(swidth, sheight, pixs);

      int iminhue = 256, imaxhue = -1, iminsat = 256, imaxsat = -1, iminbri = 256, imaxbri = -1;
      int iminred = 256, imaxred = -1, imingre = 256, imaxgre = -1, iminblu = 256, imaxblu = -1;

      if (isRGB) cp2.getRGB(hsSource, ssSource, bsSource);
      else cp2.getHSB(hsSource, ssSource, bsSource);

      for (i = 0; i < snumPixels; i++) {
        bin[hsSource[i] & 255] = 1;
        if ((hsSource[i] & 255) > imaxhue) imaxhue = (hsSource[i] & 255);
        if ((hsSource[i] & 255) < iminhue) iminhue = (hsSource[i] & 255);
        if ((ssSource[i] & 255) > imaxsat) imaxsat = (ssSource[i] & 255);
        if ((ssSource[i] & 255) < iminsat) iminsat = (ssSource[i] & 255);
        if ((bsSource[i] & 255) > imaxbri) imaxbri = (bsSource[i] & 255);
        if ((bsSource[i] & 255) < iminbri) iminbri = (bsSource[i] & 255);
        // IJ.showMessage("h:"+minhue+"H:"+maxhue+"s:"+minsat+"S:"+maxsat+"b:"+minbri+"B:"+maxbri);
      }

      if (!isRGB) { // get pass or stop filter whichever has a narrower range
        for (i = 0; i < 256; i++) {
          if (bin[i] > 0) {
            rangePassL = i;
            break;
          }
        }
        for (i = 255; i >= 0; i--) {
          if (bin[i] > 0) {
            rangePassH = i;
            break;
          }
        }
        for (i = 0; i < 256; i++) {
          if (bin[i] == 0) {
            rangeStopL = i;
            break;
          }
        }
        for (i = 255; i >= 0; i--) {
          if (bin[i] == 0) {
            rangeStopH = i;
            break;
          }
        }
        if ((rangePassH - rangePassL) < (rangeStopH - rangeStopL)) {
          bandPassH.setState(true);
          bandStopH.setState(false);
          iminhue = rangePassL;
          imaxhue = rangePassH;
        } else {
          bandPassH.setState(false);
          bandStopH.setState(true);
          iminhue = rangeStopL;
          imaxhue = rangeStopH;
        }
      } else {
        bandPassH.setState(true);
        bandStopH.setState(false);
      }

      adjustMinHue(iminhue);
      minSlider.setValue(iminhue);
      adjustMaxHue(imaxhue);
      maxSlider.setValue(imaxhue);
      adjustMinSat(iminsat);
      minSlider2.setValue(iminsat);
      adjustMaxSat(imaxsat);
      maxSlider2.setValue(imaxsat);
      adjustMinBri(iminbri);
      minSlider3.setValue(iminbri);
      adjustMaxBri(imaxbri);
      maxSlider3.setValue(imaxbri);
      originalB.setEnabled(true);
      // IJ.showStatus("done");
    }