         if minSize <= kMinImageSize
         {
             bokehSize = kMinBokehSize
-            sizeRatio = 1
+            sizeRatio = kMinSizeRatio
         }
         else
         {

        }
        else
        {
            let sizeRatio:Float = Float(minSize / kMinImageSize)
            gaussSigma = kGaussSigma * sizeRatio
        }
        
        gaussian = MPSImageGaussianBlur(

    private let kFacesTextureIndex:Int = 2
    private let kBokehTextureIndex:Int = 3
    private let kMinImageSize:Int = 640
    private let kMinBokehSize:Int = 12
    private let kMinSizeRatio:Int = 2
    private let kRepeatingElement:Float = 1
    private let kGaussSigma:Float = 10
    
    required init(device:MTLDevice)
    {
        bokehSize = 0
        sizeRatio = kMinSizeRatio
        
        super.init(device:device, functionName:kFunctionName)
    }
