C ++********************************************************************
C                                                                      *
C                                                                      *
C                                                                      *
C **********************************************************************
C=* FROM: SPIDER - MODULAR IMAGE PROCESSING SYSTEM.   AUTHOR: J.FRANK  *
C=* Copyright (C) 1985-2005  Health Research Inc.                      *
C=*                                                                    *
C=* HEALTH RESEARCH INCORPORATED (HRI),                                *   
C=* ONE UNIVERSITY PLACE, RENSSELAER, NY 12144-3455.                   *
C=*                                                                    *
C=* Email:  spider@wadsworth.org                                       *
C=*                                                                    *
C=* This program is free software; you can redistribute it and/or      *
C=* modify it under the terms of the GNU General Public License as     *
C=* published by the Free Software Foundation; either version 2 of the *
C=* License, or (at your option) any later version.                    *
C=*                                                                    *
C=* This program is distributed in the hope that it will be useful,    *
C=* but WITHOUT ANY WARRANTY; without even the implied warranty of     *
C=* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  *
C=* General Public License for more details.                           *
C=*                                                                    *
C=* You should have received a copy of the GNU General Public License  *
C=* along with this program; if not, write to the                      *
C=* Free Software Foundation, Inc.,                                    *
C=* 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.      *
C=*                                                                    *
C **********************************************************************
C                                                                      *
C                                                                      *
C                                                                      *
C  PURPOSE:                                                            *
C                                                                      *
C  PARAMETERS:                                                         *
C
C IMAGE_PROCESSING_ROUTINE                                                                     
C        0         2         3         4         5         6         7 
C23456789012345678901234567890123456789012345678901234567890123456789012                                                                  
C***********************************************************************

        SUBROUTINE  FINDMX(D,LSD,NSAM,NROW,CMX,SX,SY,JACUP)

        DIMENSION  D(LSD,NROW),Z(-1:1,-1:1)

        CMX=D(1,1)

        DO    J=1,NROW
           DO    I=1,NSAM
              IF(CMX.LE.D(I,J))  THEN
                 CMX=D(I,J)
                 IX=I
                 IY=J
               ENDIF
           ENDDO   
        ENDDO
        SX=IX-NSAM/2-1
        SY=IY-NSAM/2-1
        IF(JACUP.EQ.0)  RETURN
        IF(IY.LT.2.OR.IY.GT.NROW-1.OR.IX.LT.2.OR.IX.GT.NSAM-1) RETURN
        DO    J=-1,1
            DO    I=-1,1
               Z(I,J)=D(IX+I,IY+J)
            ENDDO
        ENDDO
        CALL  PARABL(Z,XSH,YSH,CMX)
        K=INT(100.0/FLOAT(JACUP+1))
        SX=SX
     &      +REAL(IFIX(XSH))
     &  +FLOAT(K)*FLOAT(INT(XSH*100.0/FLOAT(K)))/100.0
        SY=SY
     &      +REAL(IFIX(YSH))
     &  +FLOAT(K)*FLOAT(INT(YSH*100.0/FLOAT(K)))/100.0
        END