fix: Fix for Pillow error when extracting PNG images #3998
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When I tried to partition a PNG file and extract images, I got an error from Pillow:
```
WARNING unstructured:pdf_image_utils.py:230 Image Extraction Error: Skipping the failed image
Traceback (most recent call last):
File "/Users/austin/.pyenv/versions/unstructured/lib/python3.10/site-packages/PIL/JpegImagePlugin.py", line 666, in _save
rawmode = RAWMODE[im.mode]
KeyError: 'RGBA'
```
The issue is that a PNG has an additional layer that cannot be saved off in jpeg format. We can fix
this with a quick conversion. I added a png test case that is now passing with this fix.
badGarnet
approved these changes
May 8, 2025
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When I tried to partition a PNG file and extract images, I got an error from Pillow:
The issue is that a PNG has an additional layer that cannot be saved off in jpeg format. We can fix this with a quick conversion. I added a png test case that is now passing with this fix.