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from fastapi import FastAPI, Form, Request
from fastapi.responses import HTMLResponse, RedirectResponse
from fastapi.templating import Jinja2Templates
from utility import load_image, interpolate_batch, interpolate_single
from io import BytesIO
from PIL import Image
import base64
import numpy as np
app = FastAPI()
# Setup Jinja2 templates
templates = Jinja2Templates(directory="templates")
def convert_frames_to_base64(frames):
"""Converts numpy image arrays to base64 strings for displaying in HTML."""
base64_frames = []
for frame in frames:
img = Image.fromarray((frame * 255).astype(np.uint8))
buffered = BytesIO()
img.save(buffered, format="PNG")
base64_str = base64.b64encode(buffered.getvalue()).decode("utf-8")
base64_frames.append(base64_str)
return base64_frames
@app.get("/", response_class=HTMLResponse)
async def index(request: Request):
return templates.TemplateResponse("index.html", {"request": request})
@app.post("/", response_class=HTMLResponse)
async def generate_frames(request: Request, img1_url: str = Form(...), img2_url: str = Form(...)):
if not img1_url or not img2_url:
return RedirectResponse(url="/", status_code=303)
frames = interpolate_single(img1_url, img2_url)
if frames is not None:
base64_frames = convert_frames_to_base64(frames)
return templates.TemplateResponse("result.html", {"request": request, "frames": base64_frames})
else:
return HTMLResponse("Error processing images.", status_code=500)
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