Why can't recognize the numbers in the attached picture？

[xiandongbiequ]

[zdenop]

Please read the docs https://github.com/tesseract-ocr/tessdoc/blob/main/ImproveQuality.md:

image_filename = "i255.png"
img = Image.open(image_filename)
with tesserocr.PyTessBaseAPI(path=tessdata_path, psm=tesserocr.PSM.SINGLE_LINE) as api:
    api.SetImage(img)    
    print(api.GetUTF8Text())

Which produce:

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