third-party/leptonica/prog/expand_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.
*====================================================================*/
/*
* expand_reg.c
*
*/
#include "allheaders.h"
#define BINARY_IMAGE "test1.png"
#define TWO_BPP_IMAGE_NO_CMAP "weasel2.4g.png"
#define TWO_BPP_IMAGE_CMAP "weasel2.4c.png"
#define FOUR_BPP_IMAGE_NO_CMAP "weasel4.16g.png"
#define FOUR_BPP_IMAGE_CMAP "weasel4.16c.png"
#define EIGHT_BPP_IMAGE_NO_CMAP "weasel8.149g.png"
#define EIGHT_BPP_IMAGE_CMAP "weasel8.240c.png"
#define RGB_IMAGE "marge.jpg"
int main(int argc,
char **argv)
{
l_int32 i, w, h, same;
char filename[][64] = {BINARY_IMAGE,
TWO_BPP_IMAGE_NO_CMAP, TWO_BPP_IMAGE_CMAP,
FOUR_BPP_IMAGE_NO_CMAP, FOUR_BPP_IMAGE_CMAP,
EIGHT_BPP_IMAGE_NO_CMAP, EIGHT_BPP_IMAGE_CMAP,
RGB_IMAGE};
BOX *box;
PIX *pix, *pixs, *pixt, *pixt1, *pixt2, *pixt3, *pixt4, *pixt5, *pixd;
static char mainName[] = "expand_reg";
if (argc != 1)
return ERROR_INT(" Syntax: expand_reg", mainName, 1);
pixDisplayWrite(NULL, -1);
for (i = 0; i < 8; i++) {
pixs = pixRead(filename[i]);
pixt = pixExpandReplicate(pixs, 2);
pixDisplayWrite(pixt, 1);
pixDestroy(&pixt);
pixt = pixExpandReplicate(pixs, 3);
pixDisplayWrite(pixt, 1);
pixDestroy(&pixt);
if (i == 4) {
pixt = pixScale(pixs, 3.0, 3.0);
pixWrite("/tmp/junkpixt.png", pixt, IFF_PNG);
pixDestroy(&pixt);
}
pixDestroy(&pixs);
}
pix = pixRead("test1.png");
pixGetDimensions(pix, &w, &h, NULL);
for (i = 1; i <= 15; i++) {
box = boxCreate(13 * i, 13 * i, w - 13 * i, h - 13 * i);
pixs = pixClipRectangle(pix, box, NULL);
pixt = pixExpandReplicate(pixs, 3);
pixDisplayWrite(pixt, 1);
boxDestroy(&box);
pixDestroy(&pixt);
pixDestroy(&pixs);
}
pixDestroy(&pix);
pixs = pixRead("speckle.png");
/* Test 2x expansion of 1 bpp */
pixt = pixExpandBinaryPower2(pixs, 2);
pixDisplayWrite(pixt, 1);
pixd = pixReduceRankBinary2(pixt, 4, NULL);
pixEqual(pixs, pixd, &same);
if (!same)
fprintf(stderr, "Error in 2x 1bpp expansion\n");
pixDestroy(&pixt);
pixDestroy(&pixd);
/* Test 2x expansion of 2 bpp */
pixt1 = pixConvert1To2(NULL, pixs, 3, 0);
pixt2 = pixExpandReplicate(pixt1, 2);
pixDisplayWrite(pixt2, 1);
pixt3 = pixConvertTo8(pixt2, FALSE);
pixt4 = pixThresholdToBinary(pixt3, 250);
pixd = pixReduceRankBinary2(pixt4, 4, NULL);
pixEqual(pixs, pixd, &same);
if (!same)
fprintf(stderr, "Error in 2x 2bpp expansion\n");
pixt5 = pixExpandBinaryPower2(pixd, 2);
pixDisplayWrite(pixt5, 1);
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixt3);
pixDestroy(&pixt4);
pixDestroy(&pixt5);
pixDestroy(&pixd);
/* Test 4x expansion of 4 bpp */
pixt1 = pixConvert1To4(NULL, pixs, 15, 0);
pixt2 = pixExpandReplicate(pixt1, 4);
pixDisplayWrite(pixt2, 2);
pixt3 = pixConvertTo8(pixt2, FALSE);
pixt4 = pixThresholdToBinary(pixt3, 250);
pixDisplayWrite(pixt4, 2);
pixd = pixReduceRankBinaryCascade(pixt4, 4, 4, 0, 0);
pixEqual(pixs, pixd, &same);
if (!same)
fprintf(stderr, "Error in 4x 4bpp expansion\n");
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixt3);
pixDestroy(&pixt4);
pixDestroy(&pixd);
/* Test 8x expansion of 8 bpp */
pixt1 = pixConvertTo8(pixs, FALSE);
pixt2 = pixExpandReplicate(pixt1, 8);
pixDisplayWrite(pixt2, 4);
pixt3 = pixThresholdToBinary(pixt2, 250);
pixDisplayWrite(pixt3, 4);
pixd = pixReduceRankBinaryCascade(pixt3, 4, 4, 4, 0);
pixEqual(pixs, pixd, &same);
if (!same)
fprintf(stderr, "Error in 4x 4bpp expansion\n");
pixDestroy(&pixt1);
pixDestroy(&pixt2);
pixDestroy(&pixt3);
pixDestroy(&pixd);
pixDestroy(&pixs);
pixDisplayMultiple("/tmp/display/file*");
return 0;
}