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/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
- This software is distributed in the hope that it will be
- useful, but with NO WARRANTY OF ANY KIND.
- No author or distributor accepts responsibility to anyone for the
- consequences of using this software, or for whether it serves any
- particular purpose or works at all, unless he or she says so in
- writing. Everyone is granted permission to copy, modify and
- redistribute this source code, for commercial or non-commercial
- purposes, with the following restrictions: (1) the origin of this
- source code must not be misrepresented; (2) modified versions must
- be plainly marked as such; and (3) this notice may not be removed
- or altered from any source or modified source distribution.
*====================================================================*/
/*
* distance_reg.c
*
* This tests pixDistanceFunction for a variety of usage
* with all 8 combinations of these parameters:
*
* connectivity : 4 or 8
* dest depth : 8 or 16
* boundary cond : L_BOUNDARY_BG or L_BOUNDARY_FG
*/
#include <stdio.h>
#include <stdlib.h>
#include "allheaders.h"
#define DISPLAY 1
static void TestDistance(PIXA *pixa, PIX *pixs, l_int32 conn,
l_int32 depth, l_int32 bc);
main(int argc,
char **argv)
{
char buf[256];
l_int32 i, j, k, index, conn, depth, bc;
BOX *box;
PIX *pix, *pixs, *pixd;
PIXA *pixa;
static char mainName[] = "distance_reg";
if (argc != 1)
exit(ERROR_INT(" Syntax: distance_reg", mainName, 1));
if ((pix = pixRead("feyn.tif")) == NULL)
exit(ERROR_INT("pixs not made", mainName, 1));
box = boxCreate(383, 338, 1480, 1050);
pixs = pixClipRectangle(pix, box, NULL);
pixDisplayWrite(NULL, -1);
pixDisplayWrite(pixs, DISPLAY);
for (i = 0; i < 2; i++) {
conn = 4 + 4 * i;
for (j = 0; j < 2; j++) {
depth = 8 + 8 * j;
for (k = 0; k < 2; k++) {
bc = k + 1;
index = 4 * i + 2 * j + k;
fprintf(stderr, "Set %d\n", index);
pixa = pixaCreate(0);
pixSaveTiled(pixs, pixa, 1, 1, 20, 8);
TestDistance(pixa, pixs, conn, depth, bc);
pixd = pixaDisplay(pixa, 0, 0);
sprintf(buf, "junkdist.%d", index);
pixWrite(buf, pixd, IFF_JFIF_JPEG);
pixaDestroy(&pixa);
pixDestroy(&pixd);
}
}
}
system("/usr/bin/gthumb junk_write_display* &");
boxDestroy(&box);
pixDestroy(&pix);
pixDestroy(&pixs);
return 0;
}
static void
TestDistance(PIXA *pixa,
PIX *pixs,
l_int32 conn,
l_int32 depth,
l_int32 bc)
{
PIX *pixt1, *pixt2, *pixt3, *pixt4, *pixt5;
/* Test the distance function and display */
pixInvert(pixs, pixs);
pixt1 = pixDistanceFunction(pixs, conn, depth, bc);
pixSaveTiled(pixt1, pixa, 1, 1, 20, 0);
pixInvert(pixs, pixs);
pixDisplayWrite(pixt1, DISPLAY);
pixt2 = pixMaxDynamicRange(pixt1, L_LOG_SCALE);
pixSaveTiled(pixt2, pixa, 1, 0, 20, 0);
pixDisplayWrite(pixt2, DISPLAY);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
/* Test the distance function and display with contour rendering */
pixInvert(pixs, pixs);
pixt1 = pixDistanceFunction(pixs, conn, depth, bc);
pixSaveTiled(pixt1, pixa, 1, 1, 20, 0);
pixInvert(pixs, pixs);
pixt2 = pixRenderContours(pixt1, 2, 4, 1); /* binary output */
pixSaveTiled(pixt2, pixa, 1, 0, 20, 0);
pixDisplayWrite(pixt2, DISPLAY);
pixt3 = pixRenderContours(pixt1, 2, 4, depth);
pixt4 = pixMaxDynamicRange(pixt3, L_LINEAR_SCALE);
pixSaveTiled(pixt4, pixa, 1, 0, 20, 0);
pixDisplayWrite(pixt4, DISPLAY);
pixt5 = pixMaxDynamicRange(pixt3, L_LOG_SCALE);
pixSaveTiled(pixt5, pixa, 1, 0, 20, 0);
pixDisplayWrite(pixt5, DISPLAY);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixt3);
pixDestroy(&pixt4);
pixDestroy(&pixt5);
/* Label all pixels in each c.c. with a color equal to the
* max distance of any pixel within that c.c. from the bg.
* Note that we've normalized so the dynamic range extends
* to 255. For the image here, each unit of distance is
* represented by about 21 grayscale units. The largest
* distance is 12. */
if (depth == 8) {
pixt1 = pixDistanceFunction(pixs, conn, depth, bc);
pixt4 = pixMaxDynamicRange(pixt1, L_LOG_SCALE);
pixSaveTiled(pixt4, pixa, 1, 1, 20, 0);
pixDisplayWrite(pixt4, DISPLAY);
pixt2 = pixCreateTemplate(pixt1);
pixSetMasked(pixt2, pixs, 255);
pixSaveTiled(pixt2, pixa, 1, 0, 20, 0);
pixDisplayWrite(pixt2, DISPLAY);
pixSeedfillGray(pixt1, pixt2, 4);
pixt3 = pixMaxDynamicRange(pixt1, L_LINEAR_SCALE);
pixSaveTiled(pixt3, pixa, 1, 0, 20, 0);
pixDisplayWrite(pixt3, DISPLAY);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixt3);
pixDestroy(&pixt4);
}
return;
}
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