int fr= (int)(((double)tr * 0.393) + ((double)tg * 0.769) + ((double)tb * 0.189));  
int fg = (int)(((double)tr * 0.349) + ((double)tg * 0.686) + ((double)tb * 0.168));   
int fb= (int)(((double)tr * 0.272) + ((double)tg * 0.534) + ((double)tb * 0.131));  


//java/7811