Assignment1 / app.py
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import streamlit as st
from PIL import Image
from transformers import BlipProcessor, BlipForConditionalGeneration, pipeline
from gtts import gTTS
import tempfile
# Load models
@st.cache_resource
def load_models():
processor = BlipProcessor.from_pretrained("Salesforce/blip-image-captioning-base")
blip_model = BlipForConditionalGeneration.from_pretrained("Salesforce/blip-image-captioning-base")
gpt2_pipeline = pipeline("text-generation", model="gpt2")
return processor, blip_model, gpt2_pipeline
processor, blip_model, gpt2 = load_models()
# Streamlit UI
st.set_page_config(page_title="Kids Storyteller", page_icon="πŸ“–", layout="centered")
st.title("πŸ–ΌοΈπŸ“– Storyteller for Kids")
st.write("Upload an image and let the app create and read a magical story just for kids!")
uploaded_file = st.file_uploader("Upload an image", type=["jpg", "jpeg", "png"])
if uploaded_file:
image = Image.open(uploaded_file).convert("RGB")
st.image(image, caption="Uploaded Image", use_column_width=True)
# Step 1: Generate Caption
with st.spinner("Generating image caption..."):
inputs = processor(images=image, return_tensors="pt")
out = blip_model.generate(**inputs)
caption = processor.decode(out[0], skip_special_tokens=True)
st.success("Caption generated!")
st.write(f"**Caption:** {caption}")
# Step 2: Generate Story (remove prompt from output)
with st.spinner("Writing a children's story..."):
prompt = f"Write a short, imaginative story for children aged 3-10 about this: {caption}"
story_output = gpt2(
prompt,
max_length=100,
num_return_sequences=1,
do_sample=True,
temperature=0.9,
top_p=0.95,
top_k=50,
repetition_penalty=1.2,
pad_token_id=50256,
eos_token_id=50256,
)[0]["generated_text"]
# Strip prompt from generated output
story = story_output[len(prompt):].strip() if story_output.startswith(prompt) else story_output.strip()
story = " ".join(story.split()[:100]) # Trim to ~100 words
st.success("Story created!")
st.write(f"**Story:**\n\n{story}")
# Step 3: Convert to Audio
with st.spinner("Converting story to audio..."):
try:
tts = gTTS(text=story, lang='en')
with tempfile.NamedTemporaryFile(delete=False, suffix=".mp3") as fp:
tts.save(fp.name)
st.audio(fp.name, format="audio/mp3")
st.success("Audio playback ready!")
except Exception as e:
st.error(f"Text-to-speech failed: {e}")