Transformation blurTransformation = new Transformation() {

        @Override
        public String key() {
            return "blur()";
        }

            @Override
            public Bitmap transform(Bitmap source) {
                // TODO Auto-generated method stub
                Bitmap blurred = Blur.fastblur(mContext,
                        source, 10);
                source.recycle();
                return blurred;
            }
        };
Picasso.with(mContext).load(url).placeholder(R.drawable.placeholder_blur).transform(blurTransformation)
                                .into(Imageview,new Callback() {

                                        @Override
                                        public void onSuccess() {
                                            // TODO Auto-generated method
                                            // stub
                                            Picasso.with(mContext).load(url).placeholder(Imageview.getDrawable()).into(Imageview);
                                        }

                                        @Override
                                        public void onError() {
                                            // TODO Auto-generated method
                                            // stub

                                        }
                                    });