Unstructured cannot write mode RGBA as JPEG 错误解决

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0. 错误详细

Image Extraction Error: Skipping the failed image
Traceback (most recent call last):File "/root/miniconda3/envs/learn-yolo/lib/python3.11/site-packages/PIL/JpegImagePlugin.py", line 639, in _saverawmode = RAWMODE[im.mode]~~~~~~~^^^^^^^^^
KeyError: 'RGBA'The above exception was the direct cause of the following exception:Traceback (most recent call last):File "/mnt/e/workspace/learn-yolo/unstructured/partition/pdf_image/pdf_image_utils.py", line 222, in save_elementswrite_image(cropped_image, output_f_path)File "/mnt/e/workspace/learn-yolo/unstructured/partition/pdf_image/pdf_image_utils.py", line 52, in write_imageimage.save(output_image_path)File "/root/miniconda3/envs/learn-yolo/lib/python3.11/site-packages/PIL/Image.py", line 2568, in savesave_handler(self, fp, filename)File "/root/miniconda3/envs/learn-yolo/lib/python3.11/site-packages/PIL/JpegImagePlugin.py", line 642, in _saveraise OSError(msg) from e
OSError: cannot write mode RGBA as JPEG

1. 解决方法

要解决这个问题，需要将 RGBA 模式的图像转换为 RGB 模式。你可以在保存之前使用 convert(‘RGB’) 来转换图像格式。
修改 unstructured/partition/pdf_image/pdf_image_utils.py, 添加 cropped_image = cropped_image.convert("RGB")。

            try:image_path = image_paths[page_index]image = Image.open(image_path)cropped_image = image.crop(padded_bbox)if extract_image_block_to_payload:buffered = BytesIO()cropped_image = cropped_image.convert("RGB")cropped_image.save(buffered, format="JPEG")img_base64 = base64.b64encode(buffered.getvalue())img_base64_str = img_base64.decode()el.metadata.image_base64 = img_base64_strel.metadata.image_mime_type = "image/jpeg"else:basename = "table" if el.category == ElementType.TABLE else "figure"assert output_dir_pathoutput_f_path = os.path.join(output_dir_path,f"{basename}-{metadata_page_number}-{figure_number}.jpg",)cropped_image = cropped_image.convert("RGB")write_image(cropped_image, output_f_path)# add image path to element metadatael.metadata.image_path = output_f_pathexcept (ValueError, IOError):logger.warning("Image Extraction Error: Skipping the failed image", exc_info=True)

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