do_ocr_word_knn T_do_ocr_word_knn DoOcrWordKnn DoOcrWordKnn do_ocr_word_knn (Operator)
Name
do_ocr_word_knn T_do_ocr_word_knn DoOcrWordKnn DoOcrWordKnn do_ocr_word_knn
Signature
void DoOcrWordKnn (const HObject& Character Image OCRHandle Expression NumAlternatives NumCorrections Class Confidence Word Score
HTuple HRegion ::DoOcrWordKnn (const HImage& Image OCRHandle Expression NumAlternatives NumCorrections Confidence Word Score
HString HRegion ::DoOcrWordKnn (const HImage& Image OCRHandle Expression NumAlternatives NumCorrections Confidence Word Score
HString HRegion ::DoOcrWordKnn (const HImage& Image OCRHandle Expression NumAlternatives NumCorrections Confidence Word Score
HString HRegion ::DoOcrWordKnn (const HImage& Image OCRHandle Expression NumAlternatives NumCorrections Confidence Word Score
(
Windows only)
HTuple HOCRKnn ::DoOcrWordKnn (const HRegion& Character Image Expression NumAlternatives NumCorrections Confidence Word Score
HString HOCRKnn ::DoOcrWordKnn (const HRegion& Character Image Expression NumAlternatives NumCorrections Confidence Word Score
HString HOCRKnn ::DoOcrWordKnn (const HRegion& Character Image Expression NumAlternatives NumCorrections Confidence Word Score
HString HOCRKnn ::DoOcrWordKnn (const HRegion& Character Image Expression NumAlternatives NumCorrections Confidence Word Score
(
Windows only)
static void HOperatorSet .DoOcrWordKnn (HObject character HObject image HTuple OCRHandle HTuple expression HTuple numAlternatives HTuple numCorrections HTuple classVal HTuple confidence HTuple word HTuple score
HTuple HRegion .DoOcrWordKnn (HImage image HOCRKnn OCRHandle expression numAlternatives numCorrections HTuple confidence word score
string HRegion .DoOcrWordKnn (HImage image HOCRKnn OCRHandle expression numAlternatives numCorrections confidence word score
HTuple HOCRKnn .DoOcrWordKnn (HRegion character HImage image expression numAlternatives numCorrections HTuple confidence word score
string HOCRKnn .DoOcrWordKnn (HRegion character HImage image expression numAlternatives numCorrections confidence word score
def do_ocr_word_knn (character image ocrhandle expression num_alternatives num_corrections
def do_ocr_word_knn_s (character image ocrhandle expression num_alternatives num_corrections
Description
do_ocr_word_knn do_ocr_word_knn DoOcrWordKnn DoOcrWordKnn do_ocr_word_knn do_ocr_multi_class_knn do_ocr_multi_class_knn DoOcrMultiClassKnn DoOcrMultiClassKnn do_ocr_multi_class_knn Character Character Character character character Image Image Image image image OCRHandle OCRHandle OCRHandle OCRHandle ocrhandle Class Class Class classVal class Confidence Confidence Confidence confidence confidence
In contrast to do_ocr_multi_class_knn do_ocr_multi_class_knn DoOcrMultiClassKnn DoOcrMultiClassKnn do_ocr_multi_class_knn do_ocr_word_knn do_ocr_word_knn DoOcrWordKnn DoOcrWordKnn do_ocr_word_knn Word Word Word word word Expression Expression Expression expression expression
The Expression Expression Expression expression expression create_lexicon create_lexicon CreateLexicon CreateLexicon create_lexicon import_lexicon import_lexicon ImportLexicon ImportLexicon import_lexicon '<mylexicon>' "<mylexicon>" "<mylexicon>" "<mylexicon>" "<mylexicon>" Expression Expression Expression expression expression tuple_regexp_match tuple_regexp_match TupleRegexpMatch TupleRegexpMatch tuple_regexp_match tuple_regexp_match tuple_regexp_match TupleRegexpMatch TupleRegexpMatch tuple_regexp_match do_ocr_word_knn do_ocr_word_knn DoOcrWordKnn DoOcrWordKnn do_ocr_word_knn not
support passing extra options in an expression tuple.
If the word derived from the best class for each character does not match
the Expression Expression Expression expression expression do_ocr_word_knn do_ocr_word_knn DoOcrWordKnn DoOcrWordKnn do_ocr_word_knn NumAlternatives NumAlternatives NumAlternatives numAlternatives num_alternatives do_ocr_single_class_knn do_ocr_single_class_knn DoOcrSingleClassKnn DoOcrSingleClassKnn do_ocr_single_class_knn NumCorrections NumCorrections NumCorrections numCorrections num_corrections NumAlternatives NumAlternatives NumAlternatives numAlternatives num_alternatives NumCorrections NumCorrections NumCorrections numCorrections num_corrections
In case the Expression Expression Expression expression expression NumCorrections NumCorrections NumCorrections numCorrections num_corrections suggest_lexicon suggest_lexicon SuggestLexicon SuggestLexicon suggest_lexicon
The resulting word is graded by a Score Score Score score score Score Score Score score score Expression Expression Expression expression expression
num_corr being the actual number of applied corrections and
num_alt the total number of discarded alternatives.
Note that this is a combinatorial score which does not reflect the
original Confidence Confidence Confidence confidence confidence Class Class Class classVal class
Execution Information
Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: global (may be called from any thread).
Processed without parallelization.
Parameters
Character Character Character character character region(-array) → object HRegion HObject HObject Hobject
Characters to be recognized.
Image Image Image image image singlechannelimage → object HImage HObject HObject Hobject (byte / uint2)
Gray values of the characters.
OCRHandle OCRHandle OCRHandle OCRHandle ocrhandle ocr_knn → HOCRKnn , HTuple HHandle HTuple Htuple (handle) (IntPtr ) (HHandle ) (handle )
Handle of the OCR classifier.
Expression Expression Expression expression expression string → HTuple str HTuple Htuple (string) (string ) (HString ) (char* )
Expression describing the allowed word structure.
NumAlternatives NumAlternatives NumAlternatives numAlternatives num_alternatives integer → HTuple int HTuple Htuple (integer) (int / long) (Hlong ) (Hlong )
Number of classes per character considered for the
internal word correction.
Default:
3
Suggested values:
3, 4, 5
Value range:
1
≤
NumAlternatives
NumAlternatives
NumAlternatives
numAlternatives
num_alternatives
≤
5
NumCorrections NumCorrections NumCorrections numCorrections num_corrections integer → HTuple int HTuple Htuple (integer) (int / long) (Hlong ) (Hlong )
Maximum number of corrected characters.
Default:
2
Suggested values:
1, 2, 3, 4, 5
Value range:
0
≤
NumCorrections
NumCorrections
NumCorrections
numCorrections
num_corrections
≤
5
Class Class Class classVal class string(-array) → HTuple Sequence[str] HTuple Htuple (string) (string ) (HString ) (char* )
Result of classifying the characters with the
k-NN.
Number of elements:
Class == Character
Confidence Confidence Confidence confidence confidence real(-array) → HTuple Sequence[float] HTuple Htuple (real) (double ) (double ) (double )
Confidence of the class of the characters.
Number of elements:
Confidence == Character
Word Word Word word word string → HTuple str HTuple Htuple (string) (string ) (HString ) (char* )
Word text after classification and correction.
Score Score Score score score real → HTuple float HTuple Htuple (real) (double ) (double ) (double )
Measure of similarity between corrected word
and uncorrected classification results.
Complexity
The complexity of checking all possible corrections is of magnitude
Result
If the parameters are valid, the operator
do_ocr_word_knn do_ocr_word_knn DoOcrWordKnn DoOcrWordKnn do_ocr_word_knn 2 (
H_MSG_TRUE )
. If
necessary, an exception is raised.
Possible Predecessors
trainf_ocr_class_knn trainf_ocr_class_knn TrainfOcrClassKnn TrainfOcrClassKnn trainf_ocr_class_knn read_ocr_class_knn read_ocr_class_knn ReadOcrClassKnn ReadOcrClassKnn read_ocr_class_knn
Alternatives
do_ocr_multi_class_knn do_ocr_multi_class_knn DoOcrMultiClassKnn DoOcrMultiClassKnn do_ocr_multi_class_knn
See also
create_ocr_class_knn create_ocr_class_knn CreateOcrClassKnn CreateOcrClassKnn create_ocr_class_knn classify_class_knn classify_class_knn ClassifyClassKnn ClassifyClassKnn classify_class_knn
Module
OCR/OCV