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mappVision帮助助手 > 机器视觉帮助 > mapp Vision > 用例 > OCR - 识别和读取字符 预训练 OCR 字体 |
下文将介绍提供的预定义 OCR 字体（请参阅参数 OcrClassifier）。
预训练字体使用 Windows-1252 字符编码。因此，ASCII 码高于 127 的字符符号（如 "e"、"£"、"¥''）的外观可能与预期外观不同，这取决于所使用的字符编码。在这种情况下，应使用字符的 ASCII 码进行检查，即 "e "为 128，"£"为 163，"¥"为 165。除了基于 CNN 的 "Universal "字体外，其他预训练字体均基于 MLP 分类器。
信息：
预训练字体中的符号只能在暗处打印。因此，必须相应地选择图像采集照明！
The following sections describe the predefined OCR fonts that are provided (see parameter OcrClassifier).
The pre-trained fonts were set up with Windows-1252 character encoding. The appearance of character symbols with an ASCII code higher than 127 (these are "e", "£", "¥'') may therefore differ from the expected appearance depending on the character encoding used. In such cases, the characters should be checked using their ASCII code, i.e. 128 for "e", 163 for "£" and 165 for "¥". Pre-trained fonts are based on an MLP classifier, except for font "Universal", which is based on CNN.
Information:
The pretrained fonts have been set up with symbols that can only be printed dark on light. Lighting for the image acquisition must therefore be selected accordingly!
•Predefined fonts with regularized weight and rejection class
•Nomenclature for preconfigured OCR fonts
•Preconfigured OCR font Universal
•Preconfigured OCR font DotPrint
•Preconfigured OCR font Industrial
•Preconfigured OCR font Document