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# 4.5 Convolution operations

    VImage addgnoise( double );
    VImage compass( VIMask );
    VImage conv( VIMask );
    VImage conv_raw( VIMask );
    VImage convf( VDMask );
    VImage convf_raw( VDMask );
    VImage convsep( VIMask );
    VImage convsep_raw( VIMask );
    VImage convsepf( VDMask );
    VImage convsepf_raw( VDMask );
    VImage convsub( VIMask, int, int );
    VImage embed( int, int, int, int, int );
    VImage fastcor( VImage );
    VImage fastcor_raw( VImage );
    static VImage gaussnoise( int, int,
      double, double );
    VImage gradient( VIMask );
    VImage lindetect( VIMask );
    int mpercent( double );
    VImage rank( int, int, int );
    VImage rank_raw( int, int, int );
    VImage resize_linear( int, int );
    VImage sharpen( int, double, double,
      double, double, double );
    VImage shrink( double, double );
    VImage spcor( VImage );
    VImage spcor_raw( VImage );
    VImage stretch3( double, double );
    VImage zerox( int );