Page segmentation modes:
0 Orientation and script detection (OSD) only.
1 Automatic page segmentation with OSD.
2 Automatic page segmentation, but no OSD, or OCR.
3 Fully automatic page segmentation, but no OSD. (Default)
4 Assume a single column of text of variable sizes.
5 Assume a single uniform block of vertically aligned text.
6 Assume a single uniform block of text.
7 Treat the image as a single text line.
8 Treat the image as a single word.
9 Treat the image as a single word in a circle.
10 Treat the image as a single character.
11 Sparse text. Find as much text as possible in no particular order.
12 Sparse text with OSD.
13 Raw line. Treat the image as a single text line,
bypassing hacks that are Tesseract-specific.
您遇到问题的原因是字符限制在版本4.0中不起作用。必须强制传统模式(oem 0)限制找到的字符数。tesseract团队中的某个地方有一个bug,他们还没有解决。
tesseract-4.0.0a
支持下面的psm
。如果要进行单字符识别,请设置psm = 10
。如果你的文本只包含数字,你可以设置tessedit_char_whitelist=0123456789
。下面是带多个参数的
image_to_string
的示例用法。希望这有帮助。
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