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tesseract
3.03
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tesseract
3.03
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#include <lm_consistency.h>
Definition at line 38 of file lm_consistency.h.
| tesseract::LMConsistencyInfo::LMConsistencyInfo | ( | const LMConsistencyInfo * | parent_info | ) | [inline, explicit] |
Definition at line 53 of file lm_consistency.h.
{
if (parent_info == NULL) {
// Initialize from scratch.
num_alphas = 0;
num_digits = 0;
num_punc = 0;
num_other = 0;
chartype = CT_NONE;
punc_ref = NO_EDGE;
invalid_punc = false;
num_non_first_upper = 0;
num_lower = 0;
script_id = 0;
inconsistent_script = false;
num_inconsistent_spaces = 0;
inconsistent_font = false;
// Initialize XHeight stats.
for (int i = 0; i < kNumPos; i++) {
xht_count[i] = 0;
xht_count_punc[i] = 0;
xht_lo[i] = 0;
xht_hi[i] = 256; // kBlnCellHeight
}
xht_sp = -1; // This invalid value indicates that there was no parent.
xpos_entropy = 0;
xht_decision = XH_GOOD;
} else {
// Copy parent info
*this = *parent_info;
}
}
| float tesseract::LMConsistencyInfo::BodyMaxXHeight | ( | ) | const [inline] |
Definition at line 111 of file lm_consistency.h.
{
if (InconsistentXHeight())
return static_cast<float>(MAX_INT16);
return xht_hi[kNORM];
}
| float tesseract::LMConsistencyInfo::BodyMinXHeight | ( | ) | const [inline] |
Definition at line 106 of file lm_consistency.h.
{
if (InconsistentXHeight())
return 0.0f;
return xht_lo[kNORM];
}
| void tesseract::LMConsistencyInfo::ComputeXheightConsistency | ( | const BLOB_CHOICE * | b, |
| bool | is_punc | ||
| ) |
Definition at line 29 of file lm_consistency.cpp.
{
if (xht_decision == XH_INCONSISTENT)
return; // It isn't going to get any better.
// Compute xheight consistency.
bool parent_null = xht_sp < 0;
int parent_sp = xht_sp;
// Debug strings.
if (b->yshift() > LMConsistencyInfo::kShiftThresh) {
xht_sp = LMConsistencyInfo::kSUP;
} else if (b->yshift() < -LMConsistencyInfo::kShiftThresh) {
xht_sp = LMConsistencyInfo::kSUB;
} else {
xht_sp = LMConsistencyInfo::kNORM;
}
xht_count[xht_sp]++;
if (is_punc) xht_count_punc[xht_sp]++;
if (!parent_null) {
xpos_entropy += abs(parent_sp - xht_sp);
}
// TODO(eger): Figure out a better way to account for small caps.
// For the first character not y-shifted, we only care if it is too small.
// Too large is common in drop caps and small caps.
// inT16 small_xht = b->min_xheight();
// if (parent_vse == NULL && sp == LanguageModelConsistencyInfo::kNORM) {
// small_xht = 0;
// }
IntersectRange(b->min_xheight(), b->max_xheight(),
&(xht_lo[xht_sp]), &(xht_hi[xht_sp]));
// Compute xheight inconsistency kinds.
if (parent_null) {
if (xht_count[kNORM] == 1) {
xht_decision = XH_GOOD;
} else {
xht_decision = XH_SUBNORMAL;
}
return;
}
// When we intersect the ranges of xheights in pixels for all characters in
// each position (subscript, normal, superscript),
// How much range must be left? 0? [exactly one pixel height for xheight] 1?
// TODO(eger): Extend this code to take a prior for the rest of the line.
const int kMinIntersectedXHeightRange = 0;
for (int i = 0; i < kNumPos; i++) {
if (xht_lo[i] > xht_hi[i] - kMinIntersectedXHeightRange) {
xht_decision = XH_INCONSISTENT;
return;
}
}
// Reject as improbable anything where there's much punctuation in subscript
// or superscript regions.
if (xht_count_punc[kSUB] > xht_count[kSUB] * 0.4 ||
xht_count_punc[kSUP] > xht_count[kSUP] * 0.4) {
xht_decision = XH_INCONSISTENT;
return;
}
// Now check that the subscript and superscript aren't too small relative to
// the mainline.
double mainline_xht = static_cast<double>(xht_lo[kNORM]);
double kMinSizeRatio = 0.4;
if (mainline_xht > 0.0 &&
(static_cast<double>(xht_hi[kSUB]) / mainline_xht < kMinSizeRatio ||
static_cast<double>(xht_hi[kSUP]) / mainline_xht < kMinSizeRatio)) {
xht_decision = XH_INCONSISTENT;
return;
}
// TODO(eger): Check into inconsistency of super/subscript y offsets.
if (xpos_entropy > kMaxEntropy) {
xht_decision = XH_INCONSISTENT;
return;
}
if (xht_count[kSUB] == 0 && xht_count[kSUP] == 0) {
xht_decision = XH_GOOD;
return;
}
xht_decision = XH_SUBNORMAL;
}
| bool tesseract::LMConsistencyInfo::Consistent | ( | ) | const [inline] |
Definition at line 94 of file lm_consistency.h.
{
return (NumInconsistentPunc() == 0 && NumInconsistentCase() == 0 &&
NumInconsistentChartype() == 0 && !inconsistent_script &&
!inconsistent_font && !InconsistentXHeight());
}
| int tesseract::LMConsistencyInfo::InconsistentXHeight | ( | ) | const [inline] |
Definition at line 102 of file lm_consistency.h.
{
return xht_decision == XH_INCONSISTENT;
}
| int tesseract::LMConsistencyInfo::NumInconsistentCase | ( | ) | const [inline] |
Definition at line 87 of file lm_consistency.h.
{
return (num_non_first_upper > num_lower) ? num_lower : num_non_first_upper;
}
| int tesseract::LMConsistencyInfo::NumInconsistentChartype | ( | ) | const [inline] |
Definition at line 90 of file lm_consistency.h.
{
return (NumInconsistentPunc() + num_other +
((num_alphas > num_digits) ? num_digits : num_alphas));
}
| int tesseract::LMConsistencyInfo::NumInconsistentPunc | ( | ) | const [inline] |
Definition at line 84 of file lm_consistency.h.
{
return invalid_punc ? num_punc : 0;
}
| int tesseract::LMConsistencyInfo::NumInconsistentSpaces | ( | ) | const [inline] |
Definition at line 99 of file lm_consistency.h.
{
return num_inconsistent_spaces;
}
Definition at line 121 of file lm_consistency.h.
Definition at line 129 of file lm_consistency.h.
Definition at line 127 of file lm_consistency.h.
Definition at line 123 of file lm_consistency.h.
const int tesseract::LMConsistencyInfo::kMaxEntropy = 1 [static] |
Definition at line 47 of file lm_consistency.h.
const int tesseract::LMConsistencyInfo::kNORM = 1 [static] |
Definition at line 50 of file lm_consistency.h.
const int tesseract::LMConsistencyInfo::kNumPos = 3 [static] |
Definition at line 51 of file lm_consistency.h.
const int tesseract::LMConsistencyInfo::kShiftThresh = 1 [static] |
Definition at line 43 of file lm_consistency.h.
const int tesseract::LMConsistencyInfo::kSUB = 0 [static] |
Definition at line 50 of file lm_consistency.h.
const int tesseract::LMConsistencyInfo::kSUP = 2 [static] |
Definition at line 50 of file lm_consistency.h.
Definition at line 117 of file lm_consistency.h.
Definition at line 118 of file lm_consistency.h.
Definition at line 128 of file lm_consistency.h.
Definition at line 125 of file lm_consistency.h.
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Definition at line 120 of file lm_consistency.h.
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Definition at line 122 of file lm_consistency.h.
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Definition at line 133 of file lm_consistency.h.
Definition at line 134 of file lm_consistency.h.
Definition at line 137 of file lm_consistency.h.
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Definition at line 131 of file lm_consistency.h.
Definition at line 135 of file lm_consistency.h.
Definition at line 136 of file lm_consistency.h.
1.7.6.1