lmh188
/
twain3.0
mirror of http://192.168.1.51:8099/lmh188/twain3.0
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
twain3.0/3rdparty/hgOCR/leptonica/partify.c

313 lines
11 KiB
C
Raw Blame History

/*====================================================================*
- 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.
*====================================================================*/
/*!
* \file partify.c
* <pre>
*
* Top level
* l_int32 partifyFiles()
* l_int32 partifyPixac()
*
* Helpers
* static BOXA *pixLocateStaveSets()
* static l_int32 boxaRemoveVGaps()
* </pre>
*/
#include "allheaders.h"
/* Static helplers */
static BOXA *pixLocateStaveSets(PIX *pixs, l_int32 pageno, PIXA *pixadb);
static l_ok boxaRemoveVGaps(BOXA *boxa);
/*---------------------------------------------------------------------*
* Top level *
*---------------------------------------------------------------------*/
/*!
* \brief partifyFiles()
*
* \param[in] dirname directory of files
* \param[in] substr required filename substring; use NULL for all files
* \param[in] nparts number of parts to generate (counting from top)
* \param[in] outroot root name of output pdf files
* \param[in] debugfile [optional] set to NULL for no debug output
* \return 0 if OK, 1 on error
*
* <pre>
* Notes:
* (1) All page images are compressed in png format into a pixacomp.
* (2) Each page image is deskewed, binarized at 300 ppi,
* partified into %nparts, and saved in a set of pixacomps
* in tiff-g4 format.
* (3) Each partified pixacomp is rendered into a set of page images,
* and output as a pdf.
* </pre>
*/
l_ok
partifyFiles(const char *dirname,
const char *substr,
l_int32 nparts,
const char *outroot,
const char *debugfile)
{
PIXA *pixadb;
PIXAC *pixac;
PROCNAME("partifyFiles");
if (!dirname)
return ERROR_INT("dirname not defined", procName, 1);
if (nparts < 0 || nparts > 10)
return ERROR_INT("nparts not in [1 ... 10]", procName, 1);
if (!outroot || outroot[0] == '\n')
return ERROR_INT("outroot undefined or empty", procName, 1);
pixadb = (debugfile) ? pixaCreate(0) : NULL;
pixac = pixacompCreateFromFiles(dirname, substr, IFF_PNG);
partifyPixac(pixac, nparts, outroot, pixadb);
if (pixadb) {
L_INFO("writing debug output to %s\n", procName, debugfile);
pixaConvertToPdf(pixadb, 300, 1.0, L_FLATE_ENCODE, 0,
"Partify Debug", debugfile);
}
pixacompDestroy(&pixac);
pixaDestroy(&pixadb);
return 0;
}
/*!
* \brief partifyPixac()
*
* \param[in] pixac with at least one image
* \param[in] nparts number of parts to generate (counting from top)
* \param[in] outroot root name of output pdf files
* \param[in] pixadb [optional] debug pixa; can be NULL
* \return 0 if OK, 1 on error
*
* <pre>
* Notes:
* (1) See partifyPixac().
* (2) If the image files do not have a resolution, 300 ppi is assumed.
* </pre>
*/
l_ok
partifyPixac(PIXAC *pixac,
l_int32 nparts,
const char *outroot,
PIXA *pixadb)
{
char buf[512];
l_int32 i, j, pageno, res, npage, nbox, icount, line;
l_float32 factor;
L_BMF *bmf;
BOX *box1, *box2;
BOXA *boxa1, *boxa2, *boxa3;
PIX *pix1, *pix2, *pix3, *pix4, *pix5;
PIXAC **pixaca;
PROCNAME("partifyPixac");
if (!pixac)
return ERROR_INT("pixac not defined", procName, 1);
if ((npage = pixacompGetCount(pixac)) == 0)
return ERROR_INT("pixac is empty", procName, 1);
if (nparts < 1 || nparts > 10)
return ERROR_INT("nparts not in [1 ... 10]", procName, 1);
if (!outroot || outroot[0] == '\n')
return ERROR_INT("outroot undefined or empty", procName, 1);
/* Initialize the output array for each of the nparts */
pixaca = (PIXAC **)LEPT_CALLOC(nparts, sizeof(PIXAC *));
for (i = 0; i < nparts; i++)
pixaca[i] = pixacompCreate(0);
/* Process each page */
line = 1;
bmf = bmfCreate(NULL, 10);
for (pageno = 0; pageno < npage; pageno++) {
if ((pix1 = pixacompGetPix(pixac, pageno)) == NULL) {
L_ERROR("pix for page %d not found\n", procName, pageno);
continue;
}
/* Scale, binarize and deskew */
res = pixGetXRes(pix1);
if (res == 0 || res == 300 || res > 600) {
pix2 = pixClone(pix1);
} else {
factor = 300.0 / (l_float32)res;
if (factor > 3)
L_WARNING("resolution is very low\n", procName);
pix2 = pixScale(pix1, factor, factor);
}
pix3 = pixConvertTo1Adaptive(pix2);
pix4 = pixDeskew(pix3, 0);
pixDestroy(&pix1);
pixDestroy(&pix2);
pixDestroy(&pix3);
if (!pix4) {
L_ERROR("pix for page %d not deskewed\n", procName, pageno);
continue;
}
pix1 = pixClone(pix4); /* rename */
pixDestroy(&pix4);
/* Find the stave sets at 4x reduction */
boxa1 = pixLocateStaveSets(pix1, pageno, pixadb);
/* Break each stave set into the separate staves (parts).
* A typical set will have more than one part, but if one of
* the parts is a keyboard, it will usually have two staves
* (also called a Grand Staff), composed of treble and
* bass staves. For example, a classical violin sonata
* could have a staff for the violin and two staves for
* the piano. We would set nparts == 2, and extract both
* of the piano staves as the piano part. */
nbox = boxaGetCount(boxa1);
fprintf(stderr, "number of boxes in page %d: %d\n", pageno, nbox);
for (i = 0; i < nbox; i++, line++) {
snprintf(buf, sizeof(buf), "%d", line);
box1 = boxaGetBox(boxa1, i, L_COPY);
pix2 = pixClipRectangle(pix1, box1, NULL);
pix3 = pixMorphSequence(pix2, "d1.20 + o50.1 + o1.30", 0);
boxa2 = pixConnCompBB(pix3, 8);
boxa3 = boxaSort(boxa2, L_SORT_BY_Y, L_SORT_INCREASING, NULL);
boxaRemoveVGaps(boxa3);
icount = boxaGetCount(boxa3);
if (icount < nparts)
L_WARNING("nparts requested = %d, but only found %d\n",
procName, nparts, icount);
for (j = 0; j < icount && j < nparts; j++) {
box2 = boxaGetBox(boxa3, j, L_COPY);
if (j == nparts - 1) /* extend the box to the bottom */
boxSetSideLocations(box2, -1, -1, -1,
pixGetHeight(pix1) - 1);
pix4 = pixClipRectangle(pix2, box2, NULL);
pix5 = pixAddTextlines(pix4, bmf, buf, 1, L_ADD_LEFT);
pixacompAddPix(pixaca[j], pix5, IFF_TIFF_G4);
boxDestroy(&box2);
pixDestroy(&pix4);
pixDestroy(&pix5);
}
boxaDestroy(&boxa2);
boxaDestroy(&boxa3);
boxDestroy(&box1);
pixDestroy(&pix2);
pixDestroy(&pix3);
}
boxaDestroy(&boxa1);
pixDestroy(&pix1);
}
/* Output separate pdfs for each part */
for (i = 0; i < nparts; i++) {
snprintf(buf, sizeof(buf), "%s-%d.pdf", outroot, i);
L_INFO("writing part %d: %s\n", procName, i, buf);
pixacompConvertToPdf(pixaca[i], 300, 1.0, L_G4_ENCODE, 0, NULL, buf);
pixacompDestroy(&pixaca[i]);
}
LEPT_FREE(pixaca);
bmfDestroy(&bmf);
return 0;
}
/*
* \brief pixLocateStaveSets()
*
* \param[in] pixs 1 bpp, 300 ppi, deskewed
* \param[in] pageno page number; used for debug output
* \param[in] pixadb [optional] debug pixa; can be NULL
* \return boxa containing the stave sets at full resolution
*/
static BOXA *
pixLocateStaveSets(PIX *pixs,
l_int32 pageno,
PIXA *pixadb)
{
BOXA *boxa1, *boxa2, *boxa3, *boxa4;
PIX *pix1, *pix2;
/* Find the stave sets at 4x reduction */
pix1 = pixMorphSequence(pixs, "r11", 0);
boxa1 = pixConnCompBB(pix1, 8);
boxa2 = boxaSelectByArea(boxa1, 15000, L_SELECT_IF_GT, NULL);
boxa3 = boxaSort(boxa2, L_SORT_BY_Y, L_SORT_INCREASING, NULL);
if (pixadb) {
pix2 = pixConvertTo32(pix1);
pixRenderBoxaArb(pix2, boxa3, 2, 255, 0, 0);
pixaAddPix(pixadb, pix2, L_INSERT);
pixDisplay(pix2, 100 * pageno, 100);
}
boxaDestroy(&boxa1);
boxaDestroy(&boxa2);
boxaRemoveVGaps(boxa3);
if (pixadb) {
pix2 = pixConvertTo32(pix1);
pixRenderBoxaArb(pix2, boxa3, 2, 0, 255, 0);
pixaAddPix(pixadb, pix2, L_INSERT);
pixDisplay(pix2, 100 * pageno, 600);
}
boxa4 = boxaTransform(boxa3, 0, 0, 4.0, 4.0); /* back to full res */
boxaDestroy(&boxa3);
pixDestroy(&pix1);
return boxa4;
}
/*
* \brief boxaRemoveVGaps()
*
* \param[in] boxa
* \return 0 if OK, 1 on error
*
* <pre>
* Notes:
* (1) The boxes in %boxa are aligned vertically. Move the horizontal
* edges vertically to remove the gaps between boxes.
* </pre>
*/
static l_ok
boxaRemoveVGaps(BOXA *boxa)
{
l_int32 nbox, i, y1, h1, y2, h2, delta;
nbox = boxaGetCount(boxa);
for (i = 0; i < nbox - 1; i++) {
boxaGetBoxGeometry(boxa, i, NULL, &y1, NULL, &h1);
boxaGetBoxGeometry(boxa, i + 1, NULL, &y2, NULL, &h2);
delta = (y2 - y1 - h1) / 2;
boxaAdjustBoxSides(boxa, i, 0, 0, 0, delta);
boxaAdjustBoxSides(boxa, i + 1, 0, 0, -delta, 0);
}
boxaAdjustBoxSides(boxa, nbox - 1, 0, 0, 0, delta); /* bot of last */
return 0;
}
Reference in New Issue View Git Blame Copy Permalink