append_ocr_trainfappend_ocr_trainfAppendOcrTrainfAppendOcrTrainfappend_ocr_trainf附加光学字符识别训练文件（算子）

名称

append_ocr_trainfappend_ocr_trainfAppendOcrTrainfAppendOcrTrainfappend_ocr_trainf — 将字符添加到训练文件中。

签名

append_ocr_trainf(Character, Image : : Class, TrainingFile : )

描述

算子 append_ocr_trainfappend_ocr_trainfAppendOcrTrainfAppendOcrTrainfAppendOcrTrainfappend_ocr_trainf 用于为 trainf_ocr_class_mlptrainf_ocr_class_mlpTrainfOcrClassMlpTrainfOcrClassMlpTrainfOcrClassMlptrainf_ocr_class_mlp 或 trainf_ocr_class_svmtrainf_ocr_class_svmTrainfOcrClassSvmTrainfOcrClassSvmTrainfOcrClassSvmtrainf_ocr_class_svm 算子准备训练数据。此处将把代表字符的区域，包括其灰度值（区域和像素），及其对应的类名写入文件。支持单张图像内任意数量的区域。对于 CharacterCharacterCharacterCharactercharactercharacter 中的每个字符（区域），必须在 ClassClassClassClassclassValclass 中指定对应的类名。灰度值通过参数 ImageImageImageImageimageimage 传递。与 write_ocr_trainfwrite_ocr_trainfWriteOcrTrainfWriteOcrTrainfWriteOcrTrainfwrite_ocr_trainf 算子不同，本算子采用与现有训练文件相同的格式将字符追加至文件。若文件不存在则生成新文件。此时文件格式可通过 set_systemset_systemSetSystemSetSystemSetSystemset_system 算子的 'ocr_trainf_version'"ocr_trainf_version""ocr_trainf_version""ocr_trainf_version""ocr_trainf_version""ocr_trainf_version" 参数选择。如果 TrainingFileTrainingFileTrainingFileTrainingFiletrainingFiletraining_file 未指定文件扩展名，则自动添加'.trf'后缀。

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

CharacterCharacterCharacterCharactercharactercharacter (输入对象) region(-array) → object

待训练的字符。

ImageImageImageImageimageimage (输入对象) singlechannelimage → object (byte / uint2)

字符的灰度值。

ClassClassClassClassclassValclass (输入控制) string(-array) → (string)

字符的类（名称）。

TrainingFileTrainingFileTrainingFileTrainingFiletrainingFiletraining_file (输入控制) filename.write → (string)

训练文件的名称。

默认值： 'train_ocr' "train_ocr" "train_ocr" "train_ocr" "train_ocr" "train_ocr"

File extension: .trf, .otr

示例（C）

char       name[128];
char       class[128];

read_image(&Image,"character.tiff");
binary_threshold(Image,&Dark, 'otsu', 'dark', &UsedThreshold);
connection(Dark,&Character);
count_obj(Character,&num);
create_tuple(&Class,num);
open_window(0,0,-1,-1,0,"","",&WindowHandle);
set_color(WindowHandle,"red");
for (i=0; i<num; i++) {
  select_obj(Character,&SingleCharacter,i);
  disp_region(SingleCharacter,WindowHandle);
  printf("class of character %d ?\n",i);
  scanf("%s\n",class);
  append_ocr_trainf(Character,Image,name,class);
}

结果

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

可能的前趋

thresholdthresholdThresholdThresholdThresholdthreshold, connectionconnectionConnectionConnectionConnectionconnection, read_ocr_trainfread_ocr_trainfReadOcrTrainfReadOcrTrainfReadOcrTrainfread_ocr_trainf

可能的后继

trainf_ocr_class_mlptrainf_ocr_class_mlpTrainfOcrClassMlpTrainfOcrClassMlpTrainfOcrClassMlptrainf_ocr_class_mlp, trainf_ocr_class_svmtrainf_ocr_class_svmTrainfOcrClassSvmTrainfOcrClassSvmTrainfOcrClassSvmtrainf_ocr_class_svm, write_ocr_trainfwrite_ocr_trainfWriteOcrTrainfWriteOcrTrainfWriteOcrTrainfwrite_ocr_trainf

替代

write_ocr_trainfwrite_ocr_trainfWriteOcrTrainfWriteOcrTrainfWriteOcrTrainfwrite_ocr_trainf, write_ocr_trainf_imagewrite_ocr_trainf_imageWriteOcrTrainfImageWriteOcrTrainfImageWriteOcrTrainfImagewrite_ocr_trainf_image

模块

光学字符识别/光学字符验证

算子