Question

当我运行下面的代码时，它会报告：

追踪（最近一次呼叫最后一次）：

File "ocr2.py", line 20, in <module>
  image_jpeg = image_pdf.convert('jpeg')
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/wand/image.py", line 3032, in convert
 cloned.format = format
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/wand/image.py", line 2932, in format
 raise ValueError(repr(fmt) + ' is unsupported format')
ValueError: 'jpeg' is unsupported format

任何人都可以帮我解决这个问题吗？我不明白为什么它说'jpeg'是不受支持的格式。

from wand.image import Image
from PIL import Image as PI
import pyocr
import pyocr.builders
import io

tool = pyocr.get_available_tools()[0]
lang = tool.get_available_languages()[1]
req_image = []
final_text = []

image_pdf = Image(filename="./test.pdf", resolution=300)
image_jpeg = image_pdf.convert('jpeg')

for img in image_jpeg.sequence:
    img_page = Image(image=img)
    req_image.append(img_page.make_blob('jpeg'))

for img in req_image:
    txt = tool.image_to_string(
        PI.open(io.BytesIO(img)),
        lang=lang,
        builder=pyocr.builders.TextBuilder()
    )
    final_text.append(txt)

Answer 1

使用image_pdf.convert('JPEG')。

ImageMagick Image Formats
ImageMagick使用称为magick的ASCII字符串（例如GIF）来识别文件格式

Python3_imagemagick_convert_jpeg不受支持

1 个答案: