public void otsu(){
        int threshparam=0;
        getValuesOfRGB();

        Image src = imageView.getImage();

        int width = (int) src.getWidth();
        int height = (int) src.getHeight();

        int total = width*height;

        float sum = 0;
        for (int t=0 ; t<256 ; t++) sum += t * rgbH[t];

        float sumB = 0;
        int wB = 0;
        int wF = 0;

        float varMax = 0;
        threshparam = 0;

        for (int t=0 ; t<256 ; t++) {
            wB += rgbH[t];               // Weight Background
            if (wB == 0) continue;

            wF = total - wB;                 // Weight Foreground
            if (wF == 0) break;

            sumB += (float) (t * rgbH[t]);

            float mB = sumB / wB;            // Mean Background
            float mF = (sum - sumB) / wF;    // Mean Foreground

            // Calculate Between Class Variance
            float varBetween = (float)wB * (float)wF * (mB - mF) * (mB - mF);

            // Check if new maximum found
            if (varBetween > varMax) {
                varMax = varBetween;
                threshparam = t;
            }
        }

        binarize(threshparam);
    }