donut/single_eval.py

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from transformers import DonutProcessor, VisionEncoderDecoderModel, VisionEncoderDecoderConfig
import re
import torch
from PIL import Image
import time
from fastapi import FastAPI, UploadFile, File
import io
import os
print("Set up config")
config_vision = VisionEncoderDecoderConfig.from_pretrained("Zombely/plwiki-proto-fine-tuned-v3.2")
config_vision.encoder.image_size = [1920, 2560] # (height, width)
config_vision.decoder.max_length = 768
processor = DonutProcessor.from_pretrained("Zombely/plwiki-proto-fine-tuned-v3.2")
model = VisionEncoderDecoderModel.from_pretrained("Zombely/plwiki-proto-fine-tuned-v3.2", config=config_vision)
processor.image_processor.size = [1920, 2560][::-1] # should be (width, height)
processor.image_processor.do_align_long_axis = False
# dataset = load_dataset(config.validation_dataset_path, split=config.validation_dataset_split)
device = "cuda" if torch.cuda.is_available() else "cpu"
model.eval()
model.to(device)
print("Print ipconfig")
os.system("ipconfig")
print("Starting server")
app = FastAPI()
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@app.get("/test")
async def test():
return {"message": "Test"}
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@app.post("/process")
async def process_image(file: UploadFile= File(...)):
request_object_content = await file.read()
input_image = Image.open(io.BytesIO(request_object_content))
# prepare encoder inputs
pixel_values = processor(input_image.convert("RGB"), return_tensors="pt").pixel_values
pixel_values = pixel_values.to(device)
# prepare decoder inputs
task_prompt = "<s_cord-v2>"
decoder_input_ids = processor.tokenizer(task_prompt, add_special_tokens=False, return_tensors="pt").input_ids
decoder_input_ids = decoder_input_ids.to(device)
print("Start processing")
# autoregressively generate sequence
start_time = time.time()
outputs = model.generate(
pixel_values,
decoder_input_ids=decoder_input_ids,
max_length=model.decoder.config.max_position_embeddings,
early_stopping=True,
pad_token_id=processor.tokenizer.pad_token_id,
eos_token_id=processor.tokenizer.eos_token_id,
use_cache=True,
num_beams=1,
bad_words_ids=[[processor.tokenizer.unk_token_id]],
return_dict_in_generate=True,
)
processing_time = (time.time() - start_time)
# turn into JSON
seq = processor.batch_decode(outputs.sequences)[0]
seq = seq.replace(processor.tokenizer.eos_token, "").replace(processor.tokenizer.pad_token, "")
seq = re.sub(r"<.*?>", "", seq, count=1).strip() # remove first task start token
seq = processor.token2json(seq)
return {"data": seq['text_sequence'], "processing_time": f"{processing_time} seconds"}