text: typedef enum {
    AVERAGE=1,
    GAUSSIAN,
    LAPLACE1,
    LAPLACE2,
    LAPLACE3,
    SOBEL,
    PREWITT,
    EDGE,
    MEDIAN,
    LEE,
    ENHANCED_LEE,
    FROST,
    ENHANCED_FROST,
    GAMMA_MAP,
    KUAN
  } filter_type_t;
  
  float kernel(filter_type_t filter_type, float *inbuf, int nLines, int nSamples, 
  	     int xSample, int kernel_size);
  