question: private static int computeInitialSampleSize ( BitmapFactory . Options options , int minSideLength , int maxNumOfPixels ) { double w = options . outWidth ; double h = options . outHeight ; int lowerBound = ( maxNumOfPixels == - 1 ) ? 1 : ( int ) Math . ceil ( Math . sqrt ( w * h / maxNumOfPixels ) ) ; int upperBound = ( minSideLength == - 1 ) ? 128 : ( int ) Math . min ( Math . floor ( w / minSideLength ) , Math . floor ( h / minSideLength ) ) ; if ( upperBound < lowerBound ) { return lowerBound ; } if ( ( maxNumOfPixels == - 1 ) && ( minSideLength == - 1 ) ) { return 1 ; } else if ( minSideLength == - 1 ) { return lowerBound ; } else { return upperBound ; } }
target:  compute bitmap initial sample size