From f6d2d952505ec2397229db7c5a1b11f2e195b967 Mon Sep 17 00:00:00 2001
From: Yih-Dar SHIEH <chiapas@gmail.com>
Date: Mon, 25 Oct 2021 09:05:21 +0000
Subject: [PATCH] Update README.md

---
 README.md | 77 +++++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 66 insertions(+), 11 deletions(-)

diff --git a/README.md b/README.md
index 93382cb..c4eb860 100644
--- a/README.md
+++ b/README.md
@@ -12,35 +12,90 @@ as a proof-of-concept for the 🤗 FlaxVisionEncoderDecoder Framework.
 
 The model can be used as follows:
 
+In PyTorch
 ```python
 
+import torch
+import requests
+from PIL import Image
+from transformers import ViTFeatureExtractor, AutoTokenizer, VisionEncoderDecoderModel
+from transformers.testing_utils import require_sentorch_device
+
+
+loc = "ydshieh/vit-gpt2-coco-en"
+
+feature_extractor = ViTFeatureExtractor.from_pretrained(loc)
+tokenizer = AutoTokenizer.from_pretrained(loc)
+model = VisionEncoderDecoderModel.from_pretrained(loc)
+model.eval()
+
+
+def predict(image):
+
+    pixel_values = feature_extractor(images=image, return_tensors="pt").pixel_values
+
+    with torch.no_grad():
+        output_ids = model.generate(pixel_values, max_length=16, num_beams=4, return_dict_in_generate=True).sequences
+
+    preds = tokenizer.batch_decode(output_ids, skip_special_tokens=True)
+    preds = [pred.strip() for pred in preds]
+
+    return preds
+
+
+# We will verify our results on an image of cute cats
+url = "http://images.cocodataset.org/val2017/000000039769.jpg"
+with Image.open(requests.get(url, stream=True).raw) as image:
+    preds = predict(image)
+
+print(preds)
+# should produce
+# ['a cat laying on top of a couch next to another cat']
+
+```
+
+In Flax
+```python
+
+import jax
 import requests
 from PIL import Image
 from transformers import ViTFeatureExtractor, AutoTokenizer, FlaxVisionEncoderDecoderModel
 
+
 loc = "ydshieh/vit-gpt2-coco-en"
 
 feature_extractor = ViTFeatureExtractor.from_pretrained(loc)
 tokenizer = AutoTokenizer.from_pretrained(loc)
 model = FlaxVisionEncoderDecoderModel.from_pretrained(loc)
 
-# We will verify our results on an image of cute cats
-url = "http://images.cocodataset.org/val2017/000000039769.jpg"
-with Image.open(requests.get(url, stream=True).raw) as img:
-    pixel_values = feature_extractor(images=img, return_tensors="np").pixel_values
+gen_kwargs = {"max_length": 16, "num_beams": 4}
 
-def generate_step(pixel_values):
 
-    output_ids = model.generate(pixel_values, max_length=16, num_beams=4).sequences
+# This takes sometime when compiling the first time, but the subsequent inference will be much faster
+@jax.jit
+def generate(pixel_values):
+    output_ids = model.generate(pixel_values, **gen_kwargs).sequences
+    return output_ids
+    
+    
+def predict(image):
+
+    pixel_values = feature_extractor(images=image, return_tensors="np").pixel_values
+    output_ids = generate(pixel_values)
     preds = tokenizer.batch_decode(output_ids, skip_special_tokens=True)
     preds = [pred.strip() for pred in preds]
-
+    
     return preds
-
-preds = generate_step(pixel_values)
+    
+    
+# We will verify our results on an image of cute cats
+url = "http://images.cocodataset.org/val2017/000000039769.jpg"
+with Image.open(requests.get(url, stream=True).raw) as image:
+    preds = predict(image)
+    
 print(preds)
-
 # should produce
 # ['a cat laying on top of a couch next to another cat']
 
-```
+```
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