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color_overlay.c

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#include "sadie.h"
#include "proto.h"


extern  PIXEL   gmin;
extern  PIXEL   gmax;

#define RED    0
#define GREEN  1
#define BLUE   2
#define YELLOW 3


/*----------------------------------------------------------------------------*/
/*-General Information--------------------------------------------------------*/
/*                                                                            */
/* This function compares two edge maps.                                      */
/*                                                                            */
/*----------------------------------------------------------------------------*/
/*-Interface Information------------------------------------------------------*/
void COLOR_OVERLAY (
IMAGE  *in,      /*  I   Pointer to the input grayscale image.                */
IMAGE  *binimg,  /*  I   Pointer to the input binary image.                   */
int    color,    /*  I   Color to use for overlay                             */
IMAGE  **out     /*  O   Pointer to the output image.                         */
/*----------------------------------------------------------------------------*/
) { register short i, j, k;
    char msg[SLEN];
    IMAGE *strimg, *inverseimg, *imga, *imgb;
    IMAGE *rgbimg[3];
    short int (*tf)(IMAGE*, IMAGE **);


    /* check input */
    if (!CHECKIMG(in)) {
        MESSAGE('E'," Can't identify grayscale image.");
        goto the_end;
    } else if (in->nbnd > 1) {
        MESSAGE('E'," Only using first band for grayscale image.");
    }
    if (!CHECKIMG(binimg)) {
        MESSAGE('E'," Can't identify binary image.");
        goto the_end;
    } else if (binimg->nbnd > 1) {
        MESSAGE('E'," Only using first band for binary image.");
    }
    if ((in->nlin != binimg->nlin) || (in->npix != binimg->npix)) {
        MESSAGE('E'," Input images must be the same size!");
        goto the_end;
    }
    

    if (NAMES) {
        MESSAGE('I',"");
        MESSAGE('I',"COLOR_OVERLAY");
        MESSAGE('I',"");
        sprintf(msg," Grayscale image:                   %s",in->text);
        MESSAGE('I',msg);
        sprintf(msg," Binary image:                      %s",binimg ->text);
        MESSAGE('I',msg);
        MESSAGE('I',"");
        MESSAGE('I',"");
        if (color == RED) {
            sprintf(msg," Overlay color:  red");
        } else if (color == BLUE) {
            sprintf(msg," Overlay color:  blue");
        } else if (color == GREEN) {
            sprintf(msg," Overlay color:  green");
        } else {
            sprintf(msg," Overlay color:  yellow");
        }
        MESSAGE('I',msg);
        MESSAGE('I'," ...............");
    }

    
    tf = TFSCALE;
    gmin = (PIXEL) 255.0;
    gmax = (PIXEL) 0.0;
    STRETCH(binimg, tf, &inverseimg);

    gmin = (PIXEL) 0.0;
    gmax = (PIXEL) 255.0;
    STRETCH(binimg, tf, &binimg);

    gmin = (PIXEL) 10.0;
    gmax = (PIXEL) 255.0;
    STRETCH(in, tf, &strimg);

    COMBINE(strimg, inverseimg, MINIMUM, 1.0, 1.0, &imga);
    RELIMG(&inverseimg);

    COMBINE(strimg, binimg, MAXIMUM, 1.0, 1.0, &imgb);
    RELIMG(&strimg);

    if (color == RED) {
        rgbimg[0] = imgb;
        rgbimg[1] = imga;
        rgbimg[2] = imga;

    } else if (color == BLUE) {
        rgbimg[0] = imga;
        rgbimg[1] = imga;
        rgbimg[2] = imgb;
    } else if (color == GREEN) {
        rgbimg[0] = imga;
        rgbimg[1] = imgb;
        rgbimg[2] = imga;
    } else {
        rgbimg[0] = imgb;
        rgbimg[1] = imgb;
        rgbimg[2] = imga;
    }

    BSQTOBIL(rgbimg, 3, out);
    RELIMG(&imga);
    RELIMG(&imgb);
        
    the_end:
    /* if (TIMES) TIMING(T_EXIT); */

}

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