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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.
*====================================================================*/
/*
* affinetest.c
*
*/
#include <stdio.h>
#include <stdlib.h>
#include "allheaders.h"
#define ADDED_BORDER_PIXELS 1000
#if 0 /* for symmetry test */
#define X1 300
#define Y1 1200
#define X2 1200
#define Y2 1100
#define X3 200
#define Y3 200
#define X1P 500
#define Y1P 1700
#define X2P 1600
#define Y2P 1800
#define X3P 600
#define Y3P 300
#endif
#if 0 /* for symmetry test */
#define X1 300
#define Y1 1200
#define X2 1200
#define Y2 1100
#define X3 200
#define Y3 200
#define X1P 300
#define Y1P 1400
#define X2P 1400
#define Y2P 1500
#define X3P 200
#define Y3P 300
#endif
#if 0 /* for symmetry test */
#define X1 300
#define Y1 1250
#define X2 1125
#define Y2 1100
#define X3 200
#define Y3 200
#define X1P 350
#define Y1P 1400
#define X2P 1400
#define Y2P 1500
#define X3P 400
#define Y3P 400
#endif
#if 0 /* comparison between sequential and sampling */
#define X1 95
#define Y1 2821
#define X2 1432
#define Y2 2682
#define X3 232
#define Y3 657
#define X1P 117
#define Y1P 2629
#define X2P 1465
#define Y2P 2432
#define X3P 183
#define Y3P 490
#endif
#if 1 /* for test with large distortion */
#define X1 32
#define Y1 934
#define X2 487
#define Y2 934
#define X3 32
#define Y3 67
#define X1P 32
#define Y1P 934
#define X2P 487
#define Y2P 804
#define X3P 61
#define Y3P 83
#endif
main(int argc,
char **argv)
{
l_int32 i, j, w, h, d, x, y, wpls;
l_uint32 *datas, *lines;
char *filein, *fileout;
l_float32 *vc;
PIX *pix, *pixs, *pixd, *pixt1, *pixt2, *pixc, *pixn;
PIX *pixx, *pixg, *pixgx, *pixgi;
PTA *ptas, *ptad;
static char mainName[] = "affinetest";
pixs = pixt1 = pixt2 = pixc = pixn = pixd = NULL;
if (argc != 3)
exit(ERROR_INT(" Syntax: affinetest filein fileout", mainName, 1));
filein = argv[1];
fileout = argv[2];
#if 0 /* symmetry test: necessary but not sufficient */
if ((pix = pixRead(filein)) == NULL)
exit(ERROR_INT("pix not made", mainName, 1));
pixc = pixCopy(NULL, pix);
pixs = pixAddBorder(pix, ADDED_BORDER_PIXELS, 0);
ptas = ptaCreate(3);
ptaAddPt(ptas, X1, Y1);
ptaAddPt(ptas, X2, Y2);
ptaAddPt(ptas, X3, Y3);
ptad = ptaCreate(3);
ptaAddPt(ptad, X1P, Y1P);
ptaAddPt(ptad, X2P, Y2P);
ptaAddPt(ptad, X3P, Y3P);
pixt1 = pixAffineSequential(pixs, ptad, ptas, 0, 0);
pixDisplay(pixt1, 20, 20);
pixWrite("junkout1", pixt1, IFF_PNG);
pixt2 = pixAffineSequential(pixt1, ptas, ptad, 0, 0);
pixd = pixRemoveBorder(pixt2, ADDED_BORDER_PIXELS);
pixDisplay(pixd, 50, 50);
pixWrite(fileout, pixd, IFF_PNG);
pixXor(pixd, pixd, pixc);
pixDisplay(pixd, 100, 100);
pixWrite("junkout2", pixd, IFF_PNG);
pixDestroy(&pixc);
pixDestroy(&pixs);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixd);
ptaDestroy(&ptas);
ptaDestroy(&ptad);
#endif
#if 0 /* comparison between sequential and sampling */
if ((pixs = pixRead(filein)) == NULL)
exit(ERROR_INT("pixs not made", mainName, 1));
/* pixs = pixAddBorder(pix, 150, 0); */
#if 1 /* use the rotated image and transform back */
pixt1 = pixRotateShear(pixs, 450, 795, -0.033, L_BRING_IN_WHITE);
pixVShearIP(pixt1, 680, -0.013, L_BRING_IN_WHITE);
pixt2 = pixScale(pixt1, 1.012, 0.987);
pixRasteropIP(pixt2, -47, -171, L_BRING_IN_WHITE);
pixWrite("junkrot", pixt2, IFF_PNG);
#else /* use the original image and compare quality of transforms */
pixt2 = pixClone(pixs);
#endif
ptas = ptaCreate(3);
ptaAddPt(ptas, X1, Y1);
ptaAddPt(ptas, X2, Y2);
ptaAddPt(ptas, X3, Y3);
ptad = ptaCreate(3);
ptaAddPt(ptad, X1P, Y1P);
ptaAddPt(ptad, X2P, Y2P);
ptaAddPt(ptad, X3P, Y3P);
/* do it by sequential transforms */
startTimer();
pixd = pixAffineSequential(pixt2, ptas, ptad,
ADDED_BORDER_PIXELS, ADDED_BORDER_PIXELS);
fprintf(stderr,
" Time for pixAffineSequential(): %6.2f sec\n", stopTimer());
pixDisplay(pixd, 20, 20);
pixWrite(fileout, pixd, IFF_PNG);
pixXor(pixd, pixd, pixs);
pixDisplay(pixd, 100, 100);
pixWrite("junkout1", pixd, IFF_PNG);
/* do it by sampled transforms */
startTimer();
pixn = pixAffineSampled(pixt2, ptas, ptad, L_BRING_IN_WHITE);
fprintf(stderr, " Time for pixAffineSampled(): %6.2f sec\n", stopTimer());
pixDisplay(pixn, 150, 150);
pixWrite("junkout2", pixn, IFF_PNG);
pixXor(pixn, pixn, pixs);
pixDisplay(pixn, 200, 200);
pixWrite("junkout3", pixn, IFF_PNG);
#endif
#if 1 /* test with large distortion */
if ((pixs = pixRead(filein)) == NULL)
exit(ERROR_INT("pixs not made", mainName, 1));
ptas = ptaCreate(3);
ptaAddPt(ptas, X1, Y1);
ptaAddPt(ptas, X2, Y2);
ptaAddPt(ptas, X3, Y3);
ptad = ptaCreate(3);
ptaAddPt(ptad, X1P, Y1P);
ptaAddPt(ptad, X2P, Y2P);
ptaAddPt(ptad, X3P, Y3P);
startTimer();
pixx = pixAffineSampled(pixs, ptas, ptad, L_BRING_IN_WHITE);
fprintf(stderr, " Time for pixAffineSampled(): %6.2f sec\n", stopTimer());
pixDisplay(pixx, 0, 0);
d = pixGetDepth(pixs);
if (d == 1)
pixWrite("junkout1", pixx, IFF_PNG);
else
pixWrite("junkout1", pixx, IFF_JFIF_JPEG);
d = pixGetDepth(pixs);
if (d == 1)
pixg = pixScaleToGray3(pixs);
else
pixg = pixClone(pixs);
startTimer();
pixgx = pixAffineSampled(pixg, ptas, ptad, L_BRING_IN_WHITE);
fprintf(stderr, " Time for pixAffineSampled(): %6.2f sec\n", stopTimer());
pixDisplay(pixgx, 300, 0);
pixWrite("junkout2", pixgx, IFF_PNG);
startTimer();
pixgi = pixAffineInterpolated(pixg, ptas, ptad, L_BRING_IN_WHITE);
fprintf(stderr, " Time for pixAffineInterpolated(): %6.2f sec\n",
stopTimer());
pixDisplay(pixgi, 600, 0);
pixWrite("junkout3", pixgi, IFF_PNG);
pixDestroy(&pixs);
pixDestroy(&pixx);
pixDestroy(&pixg);
pixDestroy(&pixgx);
pixDestroy(&pixgi);
ptaDestroy(&ptas);
ptaDestroy(&ptad);
#endif
/* do it by sequential transforms */
#if 0 /* going the other way; sampling errors */
pixn = pixCreateTemplate(pixs);
w = pixGetWidth(pixn);
h = pixGetHeight(pixn);
datas = pixGetData(pixs);
wpls = pixGetWpl(pixs);
affineXformCoeffs(ptas, ptad, &vc);
fprintf(stderr, "c[0] = %f, c[1] = %f, c[2] = %f\n", vc[0], vc[1], vc[2]);
fprintf(stderr, "c[3] = %f, c[4] = %f, c[5] = %f\n", vc[3], vc[4], vc[5]);
affineXform(vc, X1, Y1, &x, &y);
fprintf(stderr, "x = %d, X1P = %d, y = %d, Y1P = %d\n", x, X1P, y, Y1P);
affineXform(vc, X2, Y2, &x, &y);
fprintf(stderr, "x = %d, X2P = %d, y = %d, Y2P = %d\n", x, X2P, y, Y2P);
affineXform(vc, X3, Y3, &x, &y);
fprintf(stderr, "x = %d, X3P = %d, y = %d, Y3P = %d\n", x, X3P, y, Y3P);
for (i = 0; i < h; i++) {
lines = datas + i * wpls;
for (j = 0; j < w; j++) {
if (GET_DATA_BIT(lines, j)) {
affineXform(vc, j, i, &x, &y);
if (x < 0 || y < 0 || x > w || y > h)
continue;
pixSetPixel(pixn, x, y, 1);
}
}
}
#endif
#if 0
pixDestroy(&pixs);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixd);
pixDestroy(&pixn);
ptaDestroy(&ptas);
ptaDestroy(&ptad);
#endif
exit(0);
}
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