protect_ocr_trainfprotect_ocr_trainfProtectOcrTrainfProtectOcrTrainfprotect_ocr_trainf (算子)

名称

protect_ocr_trainfprotect_ocr_trainfProtectOcrTrainfProtectOcrTrainfprotect_ocr_trainf — 保护训练数据。

签名

描述

Obtaining training data for an OCR classifier can be a complicated and time consuming activity. Thus, training data is valuable and there might be the necessity to protect its usage. The general idea is to prevent protected OCR training data from being reviewed or modified in any way and to ensure that its usage, e.g., training an OCR classifier, is restricted by a user password.

The approach in HALCON is to obtain OCR training data in the usual way, then write it to an unprotected OCR training file using, e.g., write_ocr_trainfwrite_ocr_trainfWriteOcrTrainfWriteOcrTrainfWriteOcrTrainfwrite_ocr_trainf, and afterwards create a new file containing the OCR training data protected with a user password. Protected training files can be used with a set of special operators that also require the correct password in order to be able to process the data, e.g., for training an OCR classifier.

It is important to keep in mind that data in a protected OCR training file cannot be reviewed or modified in any way, thus it is important to keep the original, unprotected, training data files.

Protected OCR training data can be used for training of multilayer perceptron (MLP) classifiers and support vector machine (SVM) classifiers.

protect_ocr_trainfprotect_ocr_trainfProtectOcrTrainfProtectOcrTrainfProtectOcrTrainfprotect_ocr_trainf protects the OCR training data contained in the file TrainingFileTrainingFileTrainingFileTrainingFiletrainingFiletraining_file and writes it to the protected training data file TrainingFileProtectedTrainingFileProtectedTrainingFileProtectedTrainingFileProtectedtrainingFileProtectedtraining_file_protected. The protection is done with the user password PasswordPasswordPasswordPasswordpasswordpassword. The same password has to be used afterwards in order to use the protected OCR training data, e.g., by the operators trainf_ocr_class_mlp_protectedtrainf_ocr_class_mlp_protectedTrainfOcrClassMlpProtectedTrainfOcrClassMlpProtectedTrainfOcrClassMlpProtectedtrainf_ocr_class_mlp_protected or read_ocr_trainf_names_protectedread_ocr_trainf_names_protectedReadOcrTrainfNamesProtectedReadOcrTrainfNamesProtectedReadOcrTrainfNamesProtectedread_ocr_trainf_names_protected。Empty passwords (or passwords containing the empty string) are not allowed. If the number of passwords PasswordPasswordPasswordPasswordpasswordpassword equals 1, then every output file TrainingFileProtectedTrainingFileProtectedTrainingFileProtectedTrainingFileProtectedtrainingFileProtectedtraining_file_protected is protected with that password, otherwise the number of passwords has to be equal to the number of input and output files and the output file at position n is protected with the password at position n.

执行信息

• 多线程类型：可重入（与非独占算子并行运行）。
• 多线程作用域：全局（可从任何线程调用）。
• 未采用并行化处理。

参数

结果

如果参数正确，算子 protect_ocr_trainfprotect_ocr_trainfProtectOcrTrainfProtectOcrTrainfProtectOcrTrainfprotect_ocr_trainf 返回值 2 ( H_MSG_TRUE )。否则将抛出异常。

可能的前趋

write_ocr_trainfwrite_ocr_trainfWriteOcrTrainfWriteOcrTrainfWriteOcrTrainfwrite_ocr_trainf, append_ocr_trainfappend_ocr_trainfAppendOcrTrainfAppendOcrTrainfAppendOcrTrainfappend_ocr_trainf, concat_ocr_trainfconcat_ocr_trainfConcatOcrTrainfConcatOcrTrainfConcatOcrTrainfconcat_ocr_trainf

可能的后继

read_ocr_trainf_names_protectedread_ocr_trainf_names_protectedReadOcrTrainfNamesProtectedReadOcrTrainfNamesProtectedReadOcrTrainfNamesProtectedread_ocr_trainf_names_protected, trainf_ocr_class_mlp_protectedtrainf_ocr_class_mlp_protectedTrainfOcrClassMlpProtectedTrainfOcrClassMlpProtectedTrainfOcrClassMlpProtectedtrainf_ocr_class_mlp_protected, trainf_ocr_class_svm_protectedtrainf_ocr_class_svm_protectedTrainfOcrClassSvmProtectedTrainfOcrClassSvmProtectedTrainfOcrClassSvmProtectedtrainf_ocr_class_svm_protected, select_feature_set_trainf_mlp_protectedselect_feature_set_trainf_mlp_protectedSelectFeatureSetTrainfMlpProtectedSelectFeatureSetTrainfMlpProtectedSelectFeatureSetTrainfMlpProtectedselect_feature_set_trainf_mlp_protected, select_feature_set_trainf_svm_protectedselect_feature_set_trainf_svm_protectedSelectFeatureSetTrainfSvmProtectedSelectFeatureSetTrainfSvmProtectedSelectFeatureSetTrainfSvmProtectedselect_feature_set_trainf_svm_protected

另见

select_feature_set_trainf_mlpselect_feature_set_trainf_mlpSelectFeatureSetTrainfMlpSelectFeatureSetTrainfMlpSelectFeatureSetTrainfMlpselect_feature_set_trainf_mlp

模块

光学字符识别/光学字符验证