text: var ConvolutionFilter = require('./convolution');
  
  function BlurFilter(radius) {
      ConvolutionFilter.apply(this, Array.prototype.slice.call(arguments));
  }
  BlurFilter.prototype = Object.create(ConvolutionFilter.prototype);
  BlurFilter.prototype.constructor = BlurFilter;
  BlurFilter.prototype.initKernel = function(radius) {
      this.kernel = [];
      var size = (2*radius + 1)*(2*radius + 1);
      for (var i=0; i<size; i++) {
          this.kernel[i] = 1;
      }
      this.divisor = size;
  };
  
  module.exports = BlurFilter;
  