image-extraction quality issue -- when extracting from PDF with partition_pdf()

[Yongbozzz]

Hi , I'm using partition_pdf to extract images with below config:
unstructured_kwargs={
"strategy": "hi_res",
"extract_images_in_pdf":True,
"extract_image_block_types": ["Image"],
"extract_image_block_to_payload": True,
"languages": ["eng", "chi_sim","chi"],
"chunking_strategy":"basic",
"max_characters":1000,
},
The result shows that one image will be cut into 2 or even worse, for example:

• original image in PDF:

• extracted images from PDF:

Is there any way to do image-extraction quality enhancement? thanks