Upload app.py

app.py

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+#!/usr/bin/env python3
+from doctest import OutputChecker
+import sys
+import torch
+import re
+import os
+import gradio as gr
+import requests
+
+#url = "https://github.com/simonepri/lm-scorer/tree/master/lm_scorer/models"
+#resp = requests.get(url)
+
+from sentence_transformers import SentenceTransformer, util
+#from sentence_transformers import SentenceTransformer, util
+#from sklearn.metrics.pairwise import cosine_similarity
+#from lm_scorer.models.auto import AutoLMScorer as LMScorer
+#from sentence_transformers import SentenceTransformer, util
+#from sklearn.metrics.pairwise import cosine_similarity
+
+#device = "cuda:0" if torch.cuda.is_available() else "cpu"
+#model_sts = gr.Interface.load('huggingface/sentence-transformers/stsb-distilbert-base') 
+
+#model_sts = SentenceTransformer('stsb-distilbert-base')
+model_sts = SentenceTransformer('roberta-large-nli-stsb-mean-tokens')
+#batch_size = 1
+#scorer = LMScorer.from_pretrained('gpt2' , device=device, batch_size=batch_size)
+
+#import torch
+from transformers import GPT2Tokenizer, GPT2LMHeadModel
+import numpy as np
+import re
+
+def Sort_Tuple(tup):  
+  
+	# (Sorts in descending order)  
+	tup.sort(key = lambda x: x[1])  
+	return tup[::-1]
+
+
+def softmax(x):
+	exps = np.exp(x)
+	return np.divide(exps, np.sum(exps))
+	
+
+def get_sim(x):
+    x =  str(x)[1:-1]
+    x =  str(x)[1:-1]
+    return x
+     
+# Load pre-trained model 
+
+model = GPT2LMHeadModel.from_pretrained('gpt2', output_hidden_states = True, output_attentions = True)
+
+#model  =  gr.Interface.load('huggingface/distilgpt2', output_hidden_states = True, output_attentions = True)
+
+#model.eval()
+#tokenizer =  gr.Interface.load('huggingface/distilgpt2')
+
+tokenizer = GPT2Tokenizer.from_pretrained('gpt2')
+#tokenizer = GPT2Tokenizer.from_pretrained('distilgpt2')
+
+
+def cloze_prob(text):
+
+	whole_text_encoding = tokenizer.encode(text)
+	# Parse out the stem of the whole sentence (i.e., the part leading up to but not including the critical word)
+	text_list = text.split()
+	stem = ' '.join(text_list[:-1])
+	stem_encoding = tokenizer.encode(stem)
+	# cw_encoding is just the difference between whole_text_encoding and stem_encoding
+	# note: this might not correspond exactly to the word itself
+	cw_encoding = whole_text_encoding[len(stem_encoding):]
+	# Run the entire sentence through the model. Then go "back in time" to look at what the model predicted for each token, starting at the stem.
+	# Put the whole text encoding into a tensor, and get the model's comprehensive output
+	tokens_tensor = torch.tensor([whole_text_encoding])
+	
+	with torch.no_grad():
+		outputs = model(tokens_tensor)
+		predictions = outputs[0]   
+
+	logprobs = []
+	# start at the stem and get downstream probabilities incrementally from the model(see above)
+	start = -1-len(cw_encoding)
+	for j in range(start,-1,1):
+			raw_output = []
+			for i in predictions[-1][j]:
+					raw_output.append(i.item())
+	
+			logprobs.append(np.log(softmax(raw_output)))
+			
+	# if the critical word is three tokens long, the raw_probabilities should look something like this:
+	# [ [0.412, 0.001, ... ] ,[0.213, 0.004, ...], [0.002,0.001, 0.93 ...]]
+	# Then for the i'th token we want to find its associated probability
+	# this is just: raw_probabilities[i][token_index]
+	conditional_probs = []
+	for cw,prob in zip(cw_encoding,logprobs):
+			conditional_probs.append(prob[cw])
+	# now that you have all the relevant probabilities, return their product.
+	# This is the probability of the critical word given the context before it.
+
+	return np.exp(np.sum(conditional_probs))
+
+
+
+
+
+def cos_sim(a, b):
+    return np.inner(a, b) / (np.linalg.norm(a) * (np.linalg.norm(b)))
+
+
+  
+def Visual_re_ranker(caption_G, caption_B, caption_VR, visual_context_label, visual_context_prob):
+    caption_G = caption_G
+    caption_B = caption_B
+    caption_VR = caption_VR
+    visual_context_label= visual_context_label
+    visual_context_prob = visual_context_prob
+    caption_emb_G = model_sts.encode(caption_G, convert_to_tensor=True)
+    caption_emb_B = model_sts.encode(caption_B, convert_to_tensor=True)
+    caption_emb_VR = model_sts.encode(caption_VR, convert_to_tensor=True)
+
+    visual_context_label_emb = model_sts.encode(visual_context_label, convert_to_tensor=True)
+
+
+    sim_1 =  cosine_scores = util.pytorch_cos_sim(caption_emb_G, visual_context_label_emb)
+    sim_1 = sim_1.cpu().numpy()
+    sim_1 = get_sim(sim_1)
+
+    sim_2 = cosine_scores = util.pytorch_cos_sim(caption_emb_B, visual_context_label_emb)
+    sim_2 = sim_2.cpu().numpy()
+    sim_2 = get_sim(sim_2)
+
+    sim_3 = cosine_scores = util.pytorch_cos_sim(caption_emb_VR, visual_context_label_emb)
+    sim_3 = sim_3.cpu().numpy()
+    sim_3 = get_sim(sim_3)
+ 
+
+    LM_1 = cloze_prob(caption_G)
+    LM_2 = cloze_prob(caption_B)
+    LM_3 = cloze_prob(caption_VR)
+
+    #LM  = scorer.sentence_score(caption, reduce="mean")
+    score_1 = pow(float(LM_1),pow((1-float(sim_1))/(1+ float(sim_1)),1-float(visual_context_prob)))
+    score_2 = pow(float(LM_2),pow((1-float(sim_2))/(1+ float(sim_2)),1-float(visual_context_prob)))
+    score_3 = pow(float(LM_3),pow((1-float(sim_3))/(1+ float(sim_3)),1-float(visual_context_prob)))
+
+    #return {"LM": float(LM)/1, "sim": float(sim)/1, "score": float(score)/1 }
+    return {"Graddy": float(score_1)/1, "Best-Beam-5": float(score_2)/1, "Visual_re-Ranker": float(score_3)/1  }
+    #return LM, sim, score 
+
+
+
+
+demo = gr.Interface(
+    fn=Visual_re_ranker,
+    description="Demo for Belief Revision based Caption Re-ranker with Visual Semantic Information",
+    #inputs=[gr.Textbox(value="a city street filled with traffic at night") , gr.Textbox(value="traffic"),  gr.Textbox(value="0.7458009")],
+    inputs=[gr.Textbox(value="a longhorn cow with horns standing in a field") , gr.Textbox(value="two bulls with horns standing next to each other"), gr.Textbox(value="two bulls standing next to each other"), gr.Textbox(value="ox"),  gr.Textbox(value="0.49095494")],
+    #outputs=[gr.Textbox(value="Language Model Score") , gr.Textbox(value="Semantic Similarity Score"),  gr.Textbox(value="Belief revision score via visual context")],
+    outputs="label",
+)
+demo.launch()