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tesseract/classify/classify.cpp

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///////////////////////////////////////////////////////////////////////
// File: classify.cpp
// Description: classify class.
// Author: Samuel Charron
//
// (C) Copyright 2006, Google Inc.
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
///////////////////////////////////////////////////////////////////////
#include "classify.h"
#include "intproto.h"
#include "mfoutline.h"
#include "scrollview.h"
#include "unicity_table.h"
#include <string.h>
namespace {
// Compare FontInfo structures.
bool compare_fontinfo(const FontInfo& fi1, const FontInfo& fi2) {
// The font properties are required to be the same for two font with the same
// name, so there is no need to test them.
// Consequently, querying the table with only its font name as information is
// enough to retrieve its properties.
return strcmp(fi1.name, fi2.name) == 0;
}
// Compare FontSet structures.
bool compare_font_set(const FontSet& fs1, const FontSet& fs2) {
if (fs1.size != fs2.size)
return false;
for (int i = 0; i < fs1.size; ++i) {
if (fs1.configs[i] != fs2.configs[i])
return false;
}
return true;
}
void delete_callback(FontInfo f) {
delete[] f.name;
}
void delete_callback_fs(FontSet fs) {
delete[] fs.configs;
}
}
namespace tesseract {
Classify::Classify()
: INT_MEMBER(tessedit_single_match, FALSE,
"Top choice only from CP", this->params()),
BOOL_MEMBER(classify_enable_learning, true,
"Enable adaptive classifier", this->params()),
INT_MEMBER(classify_debug_level, 0, "Classify debug level",
this->params()),
INT_MEMBER(classify_norm_method, character, "Normalization Method ...",
this->params()),
double_MEMBER(classify_char_norm_range, 0.2,
"Character Normalization Range ...", this->params()),
double_MEMBER(classify_min_norm_scale_x, 0.0, "Min char x-norm scale ...",
this->params()), /* PREV DEFAULT 0.1 */
double_MEMBER(classify_max_norm_scale_x, 0.325, "Max char x-norm scale ...",
this->params()), /* PREV DEFAULT 0.3 */
double_MEMBER(classify_min_norm_scale_y, 0.0, "Min char y-norm scale ...",
this->params()), /* PREV DEFAULT 0.1 */
double_MEMBER(classify_max_norm_scale_y, 0.325, "Max char y-norm scale ...",
this->params()), /* PREV DEFAULT 0.3 */
BOOL_MEMBER(tess_cn_matching, 0, "Character Normalized Matching",
this->params()),
BOOL_MEMBER(tess_bn_matching, 0, "Baseline Normalized Matching",
this->params()),
BOOL_MEMBER(classify_enable_adaptive_matcher, 1,
"Enable adaptive classifier",
this->params()),
BOOL_MEMBER(classify_use_pre_adapted_templates, 0,
"Use pre-adapted classifier templates", this->params()),
BOOL_MEMBER(classify_save_adapted_templates, 0,
"Save adapted templates to a file", this->params()),
BOOL_MEMBER(classify_enable_adaptive_debugger, 0, "Enable match debugger",
this->params()),
INT_MEMBER(matcher_debug_level, 0, "Matcher Debug Level", this->params()),
INT_MEMBER(matcher_debug_flags, 0, "Matcher Debug Flags", this->params()),
INT_MEMBER(classify_learning_debug_level, 0, "Learning Debug Level: ",
this->params()),
double_MEMBER(matcher_good_threshold, 0.125, "Good Match (0-1)",
this->params()),
double_MEMBER(matcher_great_threshold, 0.0, "Great Match (0-1)",
this->params()),
double_MEMBER(matcher_perfect_threshold, 0.02, "Perfect Match (0-1)",
this->params()),
double_MEMBER(matcher_bad_match_pad, 0.15, "Bad Match Pad (0-1)",
this->params()),
double_MEMBER(matcher_rating_margin, 0.1, "New template margin (0-1)",
this->params()),
double_MEMBER(matcher_avg_noise_size, 12.0, "Avg. noise blob length",
this->params()),
INT_MEMBER(matcher_permanent_classes_min, 1, "Min # of permanent classes",
this->params()),
INT_MEMBER(matcher_min_examples_for_prototyping, 3,
"Reliable Config Threshold", this->params()),
INT_MEMBER(matcher_sufficient_examples_for_prototyping, 5,
"Enable adaption even if the ambiguities have not been seen",
this->params()),
double_MEMBER(matcher_clustering_max_angle_delta, 0.015,
"Maximum angle delta for prototype clustering",
this->params()),
double_MEMBER(classify_misfit_junk_penalty, 0.0,
"Penalty to apply when a non-alnum is vertically out of "
"its expected textline position",
this->params()),
BOOL_MEMBER(classify_enable_int_fx, 1, "Enable integer fx",
this->params()),
BOOL_MEMBER(classify_enable_new_adapt_rules, 1,
"Enable new adaptation rules", this->params()),
double_MEMBER(rating_scale, 1.5, "Rating scaling factor", this->params()),
double_MEMBER(certainty_scale, 20.0, "Certainty scaling factor",
this->params()),
double_MEMBER(tessedit_class_miss_scale, 0.00390625,
"Scale factor for features not used", this->params()),
INT_MEMBER(classify_adapt_proto_threshold, 230,
"Threshold for good protos during adaptive 0-255",
this->params()),
INT_MEMBER(classify_adapt_feature_threshold, 230,
"Threshold for good features during adaptive 0-255",
this->params()),
BOOL_MEMBER(disable_character_fragments, FALSE,
"Do not include character fragments in the"
" results of the classifier", this->params()),
BOOL_MEMBER(matcher_debug_separate_windows, FALSE,
"Use two different windows for debugging the matching: "
"One for the protos and one for the features.", this->params()),
STRING_MEMBER(classify_learn_debug_str, "", "Class str to debug learning",
this->params()),
INT_INIT_MEMBER(classify_class_pruner_threshold, 229,
"Class Pruner Threshold 0-255: ", this->params()),
INT_INIT_MEMBER(classify_class_pruner_multiplier, 30,
"Class Pruner Multiplier 0-255: ", this->params()),
INT_INIT_MEMBER(classify_cp_cutoff_strength, 7,
"Class Pruner CutoffStrength: ", this->params()),
INT_INIT_MEMBER(classify_integer_matcher_multiplier, 14,
"Integer Matcher Multiplier 0-255: ", this->params()),
EnableLearning(true),
INT_MEMBER(il1_adaption_test, 0, "Dont adapt to i/I at beginning of word",
this->params()),
BOOL_MEMBER(classify_bln_numeric_mode, 0,
"Assume the input is numbers [0-9].", this->params()),
dict_(&image_) {
fontinfo_table_.set_compare_callback(
NewPermanentTessCallback(compare_fontinfo));
fontinfo_table_.set_clear_callback(
NewPermanentTessCallback(delete_callback));
fontset_table_.set_compare_callback(
NewPermanentTessCallback(compare_font_set));
fontset_table_.set_clear_callback(
NewPermanentTessCallback(delete_callback_fs));
AdaptedTemplates = NULL;
PreTrainedTemplates = NULL;
AllProtosOn = NULL;
PrunedProtos = NULL;
AllConfigsOn = NULL;
AllProtosOff = NULL;
AllConfigsOff = NULL;
TempProtoMask = NULL;
NormProtos = NULL;
AdaptiveMatcherCalls = 0;
BaselineClassifierCalls = 0;
CharNormClassifierCalls = 0;
AmbigClassifierCalls = 0;
NumWordsAdaptedTo = 0;
NumCharsAdaptedTo = 0;
NumBaselineClassesTried = 0;
NumCharNormClassesTried = 0;
NumAmbigClassesTried = 0;
NumClassesOutput = 0;
NumAdaptationsFailed = 0;
FeaturesHaveBeenExtracted = false;
FeaturesOK = true;
learn_debug_win_ = NULL;
}
Classify::~Classify() {
EndAdaptiveClassifier();
delete learn_debug_win_;
}
} // namespace tesseract
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