[Bug] 处理 img.ndim=2 的图像时，发生错误

[imClumsyPanda]

请提供下述完整信息以便快速定位问题
(Please provide the following information to quickly locate the problem)

• 系统环境/System Environment：macOS
• 使用的是哪门语言的程序/Which programing language：Python
• 所使用语言相关版本信息/Version：3.8
• OnnxRuntime版本/OnnxRuntime Version：1.15.1
• 可复现问题的demo/Demo of reproducible problems：

在读取 img.ndim = 2 的图像时，发生如下报错信息：

Traceback (most recent call last):
  File "/Applications/PyCharm CE.app/Contents/plugins/python-ce/helpers/pydev/pydevd.py", line 1496, in _exec
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "/Applications/PyCharm CE.app/Contents/plugins/python-ce/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc)
  File "/Users/liuqian/Downloads/Langchain-Chatchat/pdf.py", line 6, in <module>
    docs = loader.load()
  File "/opt/homebrew/Caskroom/miniforge/base/envs/chatchat/lib/python3.8/site-packages/langchain/document_loaders/unstructured.py", line 86, in load
    elements = self._get_elements()
  File "/Users/liuqian/Downloads/Langchain-Chatchat/document_loaders/mypdfloader.py", line 29, in _get_elements
    text = pdf2text(self.file_path)
  File "/Users/liuqian/Downloads/Langchain-Chatchat/document_loaders/mypdfloader.py", line 23, in pdf2text
    result, _ = ocr(img_array)
  File "/opt/homebrew/Caskroom/miniforge/base/envs/chatchat/lib/python3.8/site-packages/rapidocr_onnxruntime/rapid_ocr_api.py", line 74, in __call__
    dt_boxes, det_elapse = self.text_detector(img)
  File "/opt/homebrew/Caskroom/miniforge/base/envs/chatchat/lib/python3.8/site-packages/rapidocr_onnxruntime/ch_ppocr_v3_det/text_detect.py", line 65, in __call__
    data = transform(data, self.preprocess_op)
  File "/opt/homebrew/Caskroom/miniforge/base/envs/chatchat/lib/python3.8/site-packages/rapidocr_onnxruntime/ch_ppocr_v3_det/utils.py", line 225, in transform
    data = op(data)
  File "/opt/homebrew/Caskroom/miniforge/base/envs/chatchat/lib/python3.8/site-packages/rapidocr_onnxruntime/ch_ppocr_v3_det/utils.py", line 79, in __call__
    data["image"] = (img * self.scale - self.mean) / self.std
ValueError: operands could not be broadcast together with shapes (1568,1120) (1,1,3) 

经与 img.ndim=3 的图像处理时的对比发现，发生此报错的原因是 img * self.scale 为 15681120 维矩阵，self.mean 为 11*3 维矩阵无法执行计算导致。

[SWHL]

有可以复现问题的最小代码和文件吗？我这里咋复现不出来呢？

[SWHL]

已经在rapidocr_onnxruntime==1.3.1中修复，请再次尝试

[imClumsyPanda]

@SWHL 非常感谢！升级1.3.2版本后已解决。