/*!
* boxRelocateOneSide()
*
* Input: boxd (<optional>; this can be null, equal to boxs,
* or different from boxs);
* boxs (starting box; to have one side relocated)
* loc (new location of the side that is changing)
* sideflag (L_FROM_LEFT, etc., indicating the side that moves)
* Return: boxd, or null on error or if the computed boxd has
* width or height <= 0.
*
* Notes:
* (1) Set boxd == NULL to get new box; boxd == boxs for in-place;
* or otherwise to resize existing boxd.
* (2) For usage, suggest one of these:
* boxd = boxRelocateOneSide(NULL, boxs, ...); // new
* boxRelocateOneSide(boxs, boxs, ...); // in-place
* boxRelocateOneSide(boxd, boxs, ...); // other
*/
BOX *
boxRelocateOneSide(BOX *boxd,
BOX *boxs,
l_int32 loc,
l_int32 sideflag)
{
l_int32 x, y, w, h;
PROCNAME("boxRelocateOneSide");
if (!boxs)
return (BOX *)ERROR_PTR("boxs not defined", procName, NULL);
if (!boxd)
boxd = boxCopy(boxs);
boxGetGeometry(boxs, &x, &y, &w, &h);
if (sideflag == L_FROM_LEFT)
boxSetGeometry(boxd, loc, -1, w + x - loc, -1);
else if (sideflag == L_FROM_RIGHT)
boxSetGeometry(boxd, -1, -1, loc - x + 1, -1);
else if (sideflag == L_FROM_TOP)
boxSetGeometry(boxd, -1, loc, -1, h + y - loc);
else if (sideflag == L_FROM_BOTTOM)
boxSetGeometry(boxd, -1, -1, -1, loc - y + 1);
return boxd;
}
void resetStateVariables() {
cancel_ocr = false;
cachedEnv = NULL;
cachedObject = NULL;
lastProgress = 0;
boxSetGeometry(currentTextBox, 0, 0, 0, 0);
}
/*!
* boxCreate()
*
* Input: x, y, width, height
* Return: box, or null on error
*
* Notes:
* (1) This clips the box to the +quad. If no part of the
* box is in the +quad, this returns NULL.
*/
BOX *
boxCreate(l_int32 x,
l_int32 y,
l_int32 w,
l_int32 h)
{
BOX *box;
PROCNAME("boxCreate");
if (w <= 0 || h <= 0)
return (BOX *)ERROR_PTR("w and h not both > 0", procName, NULL);
if (x < 0) { /* take part in +quad */
w = w + x;
x = 0;
if (w <= 0)
return (BOX *)ERROR_PTR("x < 0 and box off +quad", procName, NULL);
}
if (y < 0) { /* take part in +quad */
h = h + y;
y = 0;
if (h <= 0)
return (BOX *)ERROR_PTR("y < 0 and box off +quad", procName, NULL);
}
if ((box = (BOX *)CALLOC(1, sizeof(BOX))) == NULL)
return (BOX *)ERROR_PTR("box not made", procName, NULL);
boxSetGeometry(box, x, y, w, h);
box->refcount = 1;
return box;
}
/*!
* boxAdjustSides()
*
* Input: boxd (<optional>; this can be null, equal to boxs,
* or different from boxs)
* boxs (starting box; to have sides adjusted)
* delleft, delright, deltop, delbot (changes in location of
* each side)
* Return: boxd, or null on error or if the computed boxd has
* width or height <= 0.
*
* Notes:
* (1) Set boxd == NULL to get new box; boxd == boxs for in-place;
* or otherwise to resize existing boxd.
* (2) For usage, suggest one of these:
* boxd = boxAdjustSides(NULL, boxs, ...); // new
* boxAdjustSides(boxs, boxs, ...); // in-place
* boxAdjustSides(boxd, boxs, ...); // other
* (1) New box dimensions are cropped at left and top to x >= 0 and y >= 0.
* (2) For example, to expand in-place by 20 pixels on each side, use
* boxAdjustSides(box, box, -20, 20, -20, 20);
*/
BOX *
boxAdjustSides(BOX *boxd,
BOX *boxs,
l_int32 delleft,
l_int32 delright,
l_int32 deltop,
l_int32 delbot)
{
l_int32 x, y, w, h, xl, xr, yt, yb, wnew, hnew;
PROCNAME("boxAdjustSides");
if (!boxs)
return (BOX *)ERROR_PTR("boxs not defined", procName, NULL);
boxGetGeometry(boxs, &x, &y, &w, &h);
xl = L_MAX(0, x + delleft);
yt = L_MAX(0, y + deltop);
xr = x + w + delright; /* one pixel beyond right edge */
yb = y + h + delbot; /* one pixel below bottom edge */
wnew = xr - xl;
hnew = yb - yt;
if (wnew < 1 || hnew < 1)
return (BOX *)ERROR_PTR("boxd has 0 area", procName, NULL);
if (!boxd)
return boxCreate(xl, yt, wnew, hnew);
else {
boxSetGeometry(boxd, xl, yt, wnew, hnew);
return boxd;
}
}
void setTextBoundaries(l_uint32 x, l_uint32 y, l_uint32 width, l_uint32 height) {
boxSetGeometry(currentTextBox, x, y, width, height);
}
int main(int argc, char* argv[])
{
PIX *pixs, *pixb, *pixt;
int minb;
if (argc < 2) {
USAGE: fprintf(stderr, "Usage: %s </path/to/text-image>\n"
"\t\t[binarize-threshold] [minw:minh:maxw:maxh]\n",
strrchr(argv[0], '/') + 1);
return EINVAL;
}
if (2 < argc) { errno = 0;
minb = strtol(argv[2], NULL, 10);
if (errno < 0) {
fprintf(stderr, "strtol: %s\n", strerror(errno));
goto USAGE;
}
} else minb = 180;
if (!(pixs = pixRead(argv[1]))) ;
if (1 && (pixt = pixBackgroundNormMorph(pixs, NULL, 4, 5, 248))) {
pixDestroy(&pixs); pixs = pixt;
} else
if (0 && (pixt = pixBackgroundNorm(pixs, NULL, NULL,
10, 15, 60, 40, 248, 2, 1))) {
pixDestroy(&pixs); pixs = pixt;
}
if (1 && (pixt = pixFindSkewAndDeskew(pixs, 1, NULL, NULL))) {
pixDestroy(&pixs); pixs = pixt;
} if (0 && pixDisplay(pixs, 0, 0)) ;
if (1) { PTA *ptas, *ptad;
if (!(pixb = pixConvertTo1(pixs, minb))) ;
// pixt = pixDeskewLocal(pixs, 10, 0, 0, 0.0, 0.0, 0.0))
if (!pixGetLocalSkewTransform(pixb,
10, 0, 0, 0.0, 0.0, 0.0, &ptas, &ptad)) {
if ((pixt = pixProjectiveSampledPta(pixs,
ptad, ptas, L_BRING_IN_WHITE))) {
pixDestroy(&pixs); pixs = pixt;
} ptaDestroy(&ptas); ptaDestroy(&ptad);
} pixDestroy(&pixb);
}
if (0 && (pixt = pixGammaTRC(NULL, pixs, 1.0, 30, 180))) {
pixDestroy(&pixs); pixs = pixt;
}
if (!(pixb = pixConvertTo1(pixs, minb))) ;
if (0) { pixDestroy(&pixs); pixs = pixCopy(pixs, pixb); } // XXX:
if (1) {
BOX* box;
int i, n, j, m;
PIX *pixi, *pixl;
BOXA *boxi, *boxl;
int x, y, w, h, wid;
int X = INT_MAX, Y = INT_MAX, W = 0, H;
// XXX: do smaller(or no) pixOpenBrick
if (pixGetRegionsBinary(pixb, &pixi, &pixl, NULL, 0)) ;
boxl = pixConnComp(pixl, NULL, 4);
n = boxaGetCount(boxl);
for (i = 0; i < n; ++i) { BOXA* boxa;
box = boxaGetBox(boxl, i, L_CLONE);
boxGetGeometry(box, &x, &y, &w, &h);
if (w < 30 || h < 30 || w < h || h < (w / 40)) {
boxDestroy(&box); continue;
boxaRemoveBox(boxl, i);
}
if (x < X) X = x; if (y < Y) Y = y; if (W < w) W = w;
pixt = pixClipRectangle(pixb, box, NULL);
boxDestroy(&box);
// XXX: for English
if (0) pixt = pixDilateBrick(pixt, pixt, h >> 1, h >> 1); else
pixt = pixDilateBrick(pixt, pixt, 16 < h ? h >> 4 : 1, h << 1);
if (0 && pixDisplay(pixt, 0, 0)) ;
boxa = pixConnComp(pixt, NULL, 8);
pixDestroy(&pixt);
wid = (h * 3) >> 2;
//boxaShift(boxa, x, y);
m = boxaGetCount(boxa);
for (j = 0; j < m; ++j) {
int x0, y0, w0;
box = boxaGetBox(boxa, j, L_CLONE);
boxGetGeometry(box, &x0, &y0, &w0, NULL);
// merge adjacent 2 or 3 small boxes
if (1 && w0 < wid && (j + 1) < m) {
BOX* boxn; int xn, wn;
boxn = boxaGetBox(boxa, j + 1, L_CLONE);
boxGetGeometry(boxn, &xn, NULL, &wn, NULL);
if ((w0 = xn + wn - x0) < h) {
boxaSparseClearBox(boxa, ++j);
if (w0 < wid && (j + 1) < m) {
boxDestroy(&boxn);
boxn = boxaGetBox(boxa, j + 1, L_CLONE);
boxGetGeometry(boxn, &xn, NULL, &wn, NULL);
if ((wn = xn + wn - x0) < h) {
boxaSparseClearBox(boxa, ++j);
w0 = wn;
}
}
boxSetGeometry(box, -1, -1, w0, -1);
} boxDestroy(&boxn);
}
boxSetGeometry(box, x + x0, y + y0, -1, -1);
boxDestroy(&box);
} boxaSparseCompact(boxa);
if (1 && (pixt = pixDrawBoxa(pixs, boxa, 1, 0xff000000))) {
pixDestroy(&pixs); pixs = pixt;
} boxaDestroy(&boxa);
} H = y + h;