traind_ocr_class_boxT_traind_ocr_class_boxTraindOcrClassBoxTraindOcrClassBoxtraind_ocr_class_box (算子)

名称

traind_ocr_class_boxT_traind_ocr_class_boxTraindOcrClassBoxTraindOcrClassBoxtraind_ocr_class_box — 通过输入区域来训练 OCR 分类器。

警告

traind_ocr_class_boxtraind_ocr_class_boxTraindOcrClassBoxTraindOcrClassBoxTraindOcrClassBoxtraind_ocr_class_box 已过时，仅出于向后兼容性考虑而保留。 New applications should use the MLP, SVM or CNN based operators instead.

签名

traind_ocr_class_box(Character, Image : : OcrHandle, Class : AvgConfidence)

描述

算子 traind_ocr_class_boxtraind_ocr_class_boxTraindOcrClassBoxTraindOcrClassBoxTraindOcrClassBoxtraind_ocr_class_box trains the classifier directly via the input of regions in an image. Any number of regions of an image can be passed. For each character (region) in CharacterCharacterCharacterCharactercharactercharacter the corresponding name (class) ClassClassClassClassclassValclass must be specified. The gray values are passed in ImageImageImageImageimageimage. When the procedure has finished the parameter AvgConfidenceAvgConfidenceAvgConfidenceAvgConfidenceavgConfidenceavg_confidence provides information about the success of the training: It contains the average confidence of the trained characters measured by a re-classification. The confidence of mismatched characters is set to 0 (thus, the average confidence will be decreased significantly).

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。

此算子修改后续输入参数的状态：

OcrHandleOcrHandleOcrHandleOcrHandleocrHandleocr_handle

在执行此算子时，若该参数值需在多个线程间使用，则必须对其访问进行同步。

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)

Gray values for the characters.

OcrHandleOcrHandleOcrHandleOcrHandleocrHandleocr_handle (输入控制，状态被修改) ocr_box → (handle)

ID of the desired OCR-classifier.

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

字符的类（名称）。

默认值： 'a' "a" "a" "a" "a" "a"

AvgConfidenceAvgConfidenceAvgConfidenceAvgConfidenceavgConfidenceavg_confidence (输出控制) real → (real)

Average confidence during a re-classification of the trained characters.

示例（C）

char name[128];
Hlong orc_handle;

read_ocr("testnet",&orc_handle);
read_image(&Image,"character.tiff");
binary_threshold(Image,&Dark, 'otsu', 'dark', &UsedThreshold);
connection(Dark,&Character);
count_obj(Character,&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",name);
  traind_ocr_class_box(SingleCharacter,Image,OcrHandle,name,&AvgConfidence);
}

结果

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

可能的前趋

create_ocr_class_boxcreate_ocr_class_boxCreateOcrClassBoxCreateOcrClassBoxCreateOcrClassBoxcreate_ocr_class_box, read_ocrread_ocrReadOcrReadOcrReadOcrread_ocr

可能的后继

write_ocrwrite_ocrWriteOcrWriteOcrWriteOcrwrite_ocr, do_ocr_multido_ocr_multiDoOcrMultiDoOcrMultiDoOcrMultido_ocr_multi, do_ocr_singledo_ocr_singleDoOcrSingleDoOcrSingleDoOcrSingledo_ocr_single

替代

trainf_ocr_class_boxtrainf_ocr_class_boxTrainfOcrClassBoxTrainfOcrClassBoxTrainfOcrClassBoxtrainf_ocr_class_box

模块

光学字符识别/光学字符验证

算子