README.md

---
# Auto-generated fields, verify and update as needed
license: apache-2.0
tags:
- generated-by-script
- peft # Assume PEFT adapter unless explicitly a full model repo
- image-captioning # Add more specific task tags if applicable
base_model: [] # <-- FIXED: Provide empty list as default to satisfy validator
# - nlpconnect/vit-gpt2-image-captioning # Heuristic guess for processor, VERIFY MANUALLY
# - nlpconnect/vit-gpt2-image-captioning # Heuristic guess for decoder, VERIFY MANUALLY
---

# Model: ashimdahal/nlpconnect-vit-gpt2-image-captioning_nlpconnect-vit-gpt2-image-captioning

This repository contains model artifacts for a run named `nlpconnect-vit-gpt2-image-captioning_nlpconnect-vit-gpt2-image-captioning`, likely a PEFT adapter.

## Training Source
This model was trained as part of the project/codebase available at:
https://github.com/ashimdahal/captioning_image/blob/main

## Base Model Information (Heuristic)
* **Processor/Vision Encoder (Guessed):** `nlpconnect/vit-gpt2-image-captioning`
* **Decoder/Language Model (Guessed):** `nlpconnect/vit-gpt2-image-captioning`

**⚠️ Important:** The `base_model` tag in the metadata above is initially empty. The models listed here are *heuristic guesses* based on the training directory name (`nlpconnect-vit-gpt2-image-captioning_nlpconnect-vit-gpt2-image-captioning`). Please verify these against your training configuration and update the `base_model:` list in the YAML metadata block at the top of this README with the correct Hugging Face model identifiers.

## How to Use (Example with PEFT)

```python
from transformers import AutoProcessor, AutoModelForVision2Seq, Blip2ForConditionalGeneration # Or other relevant classes
from peft import PeftModel, PeftConfig
import torch

# --- Configuration ---
# 1. Specify the EXACT base model identifiers used during training
base_processor_id = "nlpconnect/vit-gpt2-image-captioning" # <-- Replace with correct HF ID
base_model_id = "nlpconnect/vit-gpt2-image-captioning" # <-- Replace with correct HF ID (e.g., Salesforce/blip2-opt-2.7b)

# 2. Specify the PEFT adapter repository ID (this repo)
adapter_repo_id = "ashimdahal/nlpconnect-vit-gpt2-image-captioning_nlpconnect-vit-gpt2-image-captioning"

# --- Load Base Model and Processor ---
processor = AutoProcessor.from_pretrained(base_processor_id)

# Load the base model (ensure it matches the type used for training)
# Example for BLIP-2 OPT:
base_model = Blip2ForConditionalGeneration.from_pretrained(
     base_model_id,
     torch_dtype=torch.float16 # Or torch.bfloat16 or float32, match training/inference needs
)
# Or for other model types:
base_model = AutoModelForVision2Seq.from_pretrained(base_model_id, torch_dtype=torch.float16)
base_model = AutoModelForCausalLM
......

# --- Load PEFT Adapter ---
# Load the adapter config and merge the adapter weights into the base model
model = PeftModel.from_pretrained(base_model, adapter_repo_id)
model = model.merge_and_unload() # Merge weights for inference (optional but often recommended)
model.eval() # Set model to evaluation mode

# --- Inference Example ---
device = "cuda" if torch.cuda.is_available() else "cpu"
model.to(device)

image = ... # Load your image (e.g., using PIL)
text = "a photo of" # Optional prompt start

inputs = processor(images=image, text=text, return_tensors="pt").to(device, torch.float16) # Match model dtype

generated_ids = model.generate(**inputs, max_new_tokens=50)
generated_text = processor.batch_decode(generated_ids, skip_special_tokens=True)[0].strip()
print(f"Generated Caption: {{generated_text}}")
```

*More model-specific documentation, evaluation results, and usage examples should be added here.*