third-party/leptonica/prog/distance_reg.c
/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
-
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- 2. Redistributions in binary form must reproduce the above
- copyright notice, this list of conditions and the following
- disclaimer in the documentation and/or other materials
- provided with the distribution.
-
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*====================================================================*/
/*
* 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 "allheaders.h"
static void TestDistance(PIXA *pixa, PIX *pixs, l_int32 conn,
l_int32 depth, l_int32 bc, L_REGPARAMS *rp);
#define DEBUG 0
int main(int argc,
char **argv)
{
l_int32 i, j, k, index, conn, depth, bc;
BOX *box;
PIX *pix, *pixs, *pixd;
PIXA *pixa;
L_REGPARAMS *rp;
if (regTestSetup(argc, argv, &rp))
return 1;
pix = pixRead("feyn.tif");
box = boxCreate(383, 338, 1480, 1050);
pixs = pixClipRectangle(pix, box, NULL);
regTestWritePixAndCheck(rp, pixs, IFF_PNG); /* 0 */
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);
if (DEBUG) {
fprintf(stderr, "%d: conn = %d, depth = %d, bc = %d\n",
rp->index + 1, conn, depth, bc);
}
pixa = pixaCreate(0);
pixSaveTiled(pixs, pixa, 1.0, 1, 20, 8);
TestDistance(pixa, pixs, conn, depth, bc, rp);
pixd = pixaDisplay(pixa, 0, 0);
pixDisplayWithTitle(pixd, 0, 0, NULL, rp->display);
pixaDestroy(&pixa);
pixDestroy(&pixd);
}
}
}
boxDestroy(&box);
pixDestroy(&pix);
pixDestroy(&pixs);
return regTestCleanup(rp);
}
static void
TestDistance(PIXA *pixa,
PIX *pixs,
l_int32 conn,
l_int32 depth,
l_int32 bc,
L_REGPARAMS *rp)
{
PIX *pixt1, *pixt2, *pixt3, *pixt4, *pixt5;
/* Test the distance function and display */
pixInvert(pixs, pixs);
pixt1 = pixDistanceFunction(pixs, conn, depth, bc);
regTestWritePixAndCheck(rp, pixt1, IFF_PNG); /* a + 1 */
pixSaveTiled(pixt1, pixa, 1.0, 1, 20, 0);
pixInvert(pixs, pixs);
pixt2 = pixMaxDynamicRange(pixt1, L_LOG_SCALE);
regTestWritePixAndCheck(rp, pixt2, IFF_JFIF_JPEG); /* a + 2 */
pixSaveTiled(pixt2, pixa, 1.0, 0, 20, 0);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
/* Test the distance function and display with contour rendering */
pixInvert(pixs, pixs);
pixt1 = pixDistanceFunction(pixs, conn, depth, bc);
regTestWritePixAndCheck(rp, pixt1, IFF_PNG); /* a + 3 */
pixSaveTiled(pixt1, pixa, 1.0, 1, 20, 0);
pixInvert(pixs, pixs);
pixt2 = pixRenderContours(pixt1, 2, 4, 1); /* binary output */
regTestWritePixAndCheck(rp, pixt2, IFF_PNG); /* a + 4 */
pixSaveTiled(pixt2, pixa, 1.0, 0, 20, 0);
pixt3 = pixRenderContours(pixt1, 2, 4, depth);
pixt4 = pixMaxDynamicRange(pixt3, L_LINEAR_SCALE);
regTestWritePixAndCheck(rp, pixt4, IFF_JFIF_JPEG); /* a + 5 */
pixSaveTiled(pixt4, pixa, 1.0, 0, 20, 0);
pixt5 = pixMaxDynamicRange(pixt3, L_LOG_SCALE);
regTestWritePixAndCheck(rp, pixt5, IFF_JFIF_JPEG); /* a + 6 */
pixSaveTiled(pixt5, pixa, 1.0, 0, 20, 0);
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);
regTestWritePixAndCheck(rp, pixt4, IFF_JFIF_JPEG); /* b + 1 */
pixSaveTiled(pixt4, pixa, 1.0, 1, 20, 0);
pixt2 = pixCreateTemplate(pixt1);
pixSetMasked(pixt2, pixs, 255);
regTestWritePixAndCheck(rp, pixt2, IFF_JFIF_JPEG); /* b + 2 */
pixSaveTiled(pixt2, pixa, 1.0, 0, 20, 0);
pixSeedfillGray(pixt1, pixt2, 4);
pixt3 = pixMaxDynamicRange(pixt1, L_LINEAR_SCALE);
regTestWritePixAndCheck(rp, pixt3, IFF_JFIF_JPEG); /* b + 3 */
pixSaveTiled(pixt3, pixa, 1.0, 0, 20, 0);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixt3);
pixDestroy(&pixt4);
}
return;
}