Working with multiple images and ironbow filter

[speri203]

I am running into an issue with this script when I try to run it on all images within a folder. I initially checked to see that the flir encoded data was in the metadata with exiftool. It is present. When running the code, though, on ironbow filter images I get the following error:
Traceback (most recent call last):
File ".\u_value_module.py", line 438, in
export_temperatures()
File ".\u_value_module.py", line 434, in export_temperatures
flir.process_image(images)
File "C:\Users\sai.peri\Documents\u_value_module\flir_image_extractor.py", line 62, in process_image
self.rgb_image_np = self.extract_embedded_image()
File "C:\Users\sai.peri\Documents\u_value_module\flir_image_extractor.py", line 102, in extract_embedded_image
visual_img = Image.open(visual_img_stream)
File "C:\Users\sai.peri\AppData\Local\Programs\Python\Python37-32\lib\site-packages\PIL\Image.py", line 2822, in open
raise IOError("cannot identify image file %r" % (filename if filename else fp))
OSError: cannot identify image file <_io.BytesIO object at 0x038543C0>

Not sure how to fix it. It occurs at the visual_img = Image.open line.