background-replacement / captioner.py
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from transformers import pipeline
captioner = None
PROMPT = "The main subject of this picture is a"
def init():
global captioner
print("Initializing captioner...")
captioner = pipeline(
"image-to-text",
model="Salesforce/blip-image-captioning-base",
prompt=PROMPT
)
def derive_caption(image):
result = captioner(image, max_new_tokens=20)
raw_caption = result[0]["generated_text"]
caption = raw_caption.lower().replace(PROMPT.lower(), "").strip()
return caption