float refSum = (float) greyReferenceRed + (float) greyReferenceGreen + (float) greyReferenceBlue;

        float partialRed = greyReferenceRed / refSum;
        float partialGreen = greyReferenceGreen / refSum;
        float partialBlue = greyReferenceBlue / refSum;

        float correctRed = ((float) 0.3333 - partialRed) / ((float) 1.0);
        float correctGreen = ((float) 0.3333 - partialGreen) / ((float) 2.0);
        float correctBlue = ((float) 0.3333 - partialBlue) / ((float) 1.0);

        float currentRed = rggbGains.getRed();
        float currentGreenEven = rggbGains.getGreenEven();
        float currentGreenOdd = rggbGains.getGreenOdd();
        float currentBlue = rggbGains.getBlue();

        float suggestedNewRed = currentRed + correctRed;
        float suggestedNewGreenEven = currentGreenEven + correctGreen;
        float suggestedNewGreenOdd = currentGreenOdd + correctGreen;
        float suggestedNewBlue = currentBlue + correctBlue;

        float[] suggestions = {suggestedNewRed,
                suggestedNewGreenEven,
            suggestedNewGreenOdd,
            suggestedNewBlue};

        for(int i = 0; i< suggestions.length; ++i){
            if(suggestions[i]<1.0){
                suggestions[i]=(float)1.0;
            }
            if(suggestions[i]>3.0){
                suggestions[i]=(float)3.0;
            }
        }

        rggbGains = new RggbChannelVector(suggestions[0], suggestions[1], suggestions[2], suggestions[3]);

        Log.i("Log", "========> New RGGB gains " + rggbGains.toString());

        mPreviewRequestBuilder.set(CaptureRequest.COLOR_CORRECTION_GAINS, rggbGains);