Enumeration FilterType

public @interface FilterType
{
   /**High-pass filter: Enhances edges and fine details by attenuating low-frequency components.*/
   public static final int FT_HIGH_PASS = 1；
   /**Sharpen filter: Increases contrast along edges to make the image appear more defined.*/
   public static final int FT_SHARPEN = 2；
   /**Smooth (blur) filter: Reduces noise and detail by averaging pixel values, creating a softening effect.*/
   public static final int FT_SMOOTH = 3;
}