feat: add NOT_FOUND token

data/adversarial.py

@@ -0,0 +1,21 @@
+import json
+import sys
+import random
+
+with open(sys.argv[1]) as fp:
+    data = json.load(fp)
+
+for _, d in enumerate(data):
+    swaps = []
+    for index, ins in enumerate(d['instructions']):
+        p = random.random()
+        if p > 0.5:
+            swaps.append(True)
+            d['instructions'][index] += 'This is swap.'
+        else:
+            swaps.append(False)
+        d['swap'] = swaps
+print(data)
+
+with open(sys.argv[1], 'w') as fp:
+    json.dump(data, fp)

r2r_src/agent.py

@@ -147,7 +147,7 @@ class Seq2SeqAgent(BaseAgent):
         return Variable(torch.from_numpy(features), requires_grad=False).cuda()
 
     def _candidate_variable(self, obs):
-        candidate_leng = [len(ob['candidate']) + 1 for ob in obs]  # +1 is for the end
+        candidate_leng = [len(ob['candidate']) + 2 for ob in obs]  # +1 is for the end
         candidate_feat = np.zeros((len(obs), max(candidate_leng), self.feature_size + args.angle_feat_size), dtype=np.float32)
 
         # Note: The candidate_feat at len(ob['candidate']) is the feature for the END
@@ -155,6 +155,7 @@ class Seq2SeqAgent(BaseAgent):
         for i, ob in enumerate(obs):
             for j, cc in enumerate(ob['candidate']):
                 candidate_feat[i, j, :] = cc['feature']
+            candidate_feat[i, -1, :] = np.ones((self.feature_size + args.angle_feat_size))
 
         return torch.from_numpy(candidate_feat).cuda(), candidate_leng
 
@@ -186,7 +187,10 @@ class Seq2SeqAgent(BaseAgent):
                         break
                 else:   # Stop here
                     assert ob['teacher'] == ob['viewpoint']         # The teacher action should be "STAY HERE"
+                    if ob['swap']:                                 # instruction 有被換過，所以要 not found
                         a[i] = len(ob['candidate'])
+                    else:                                           # STOP
+                        a[i] = len(ob['candidate'])-1
         return torch.from_numpy(a).cuda()
 
     def make_equiv_action(self, a_t, perm_obs, perm_idx=None, traj=None):
@@ -205,7 +209,8 @@ class Seq2SeqAgent(BaseAgent):
 
         for i, idx in enumerate(perm_idx):
             action = a_t[i]
-            if action != -1:            # -1 is the <stop> action
+            print('action: ', action)
+            if action != -1 and action != -2:            # -1 is the <stop> action
                 select_candidate = perm_obs[i]['candidate'][action]
                 src_point = perm_obs[i]['viewIndex']
                 trg_point = select_candidate['pointId']
@@ -228,6 +233,11 @@ class Seq2SeqAgent(BaseAgent):
                 # print("action: {} view_index: {}".format(action, state.viewIndex))
                 if traj is not None:
                     traj[i]['path'].append((state.location.viewpointId, state.heading, state.elevation))
+            elif action == -1:
+                print('<STOP>')
+            elif action == -2:
+                print('<NOT_FOUND>')
+
 
     def rollout(self, train_ml=None, train_rl=True, reset=True):
         """
@@ -252,8 +262,10 @@ class Seq2SeqAgent(BaseAgent):
         # Language input
         sentence, language_attention_mask, token_type_ids, \
             seq_lengths, perm_idx = self._sort_batch(obs)
+
         perm_obs = obs[perm_idx]
         
+
         ''' Language BERT '''
         language_inputs = {'mode':        'language',
                         'sentence':       sentence,
@@ -294,10 +306,6 @@ class Seq2SeqAgent(BaseAgent):
 
             input_a_t, candidate_feat, candidate_leng = self.get_input_feat(perm_obs)
 
-            print("input_a_t: ", input_a_t.shape)
-            print("candidate_feat: ", candidate_feat.shape)
-            print("candidate_leng: ", candidate_leng)
-
             # the first [CLS] token, initialized by the language BERT, serves
             # as the agent's state passing through time steps
             if (t >= 1) or (args.vlnbert=='prevalent'):
@@ -322,11 +330,23 @@ class Seq2SeqAgent(BaseAgent):
 
             # Mask outputs where agent can't move forward
             # Here the logit is [b, max_candidate]
+            # (8, max(candidate))
             candidate_mask = utils.length2mask(candidate_leng)
             logit.masked_fill_(candidate_mask, -float('inf'))
 
             # Supervised training
             target = self._teacher_action(perm_obs, ended)
+            for i, d in enumerate(target):
+                print(perm_obs[i]['swap'], perm_obs[i]['instructions'])
+                print(d)
+                _, at_t = logit.max(1)
+                if at_t[i].item() == candidate_leng[i]-1:
+                    print("-2")
+                elif at_t[i].item() == candidate_leng[i]-2:
+                    print("-1")
+                else:
+                    print(at_t[i].item())
+                print()
             ml_loss += self.criterion(logit, target)
 
             # Determine next model inputs
@@ -347,12 +367,15 @@ class Seq2SeqAgent(BaseAgent):
             else:
                 print(self.feedback)
                 sys.exit('Invalid feedback option')
+
             # Prepare environment action
             # NOTE: Env action is in the perm_obs space
             cpu_a_t = a_t.cpu().numpy()
             for i, next_id in enumerate(cpu_a_t):
-                if next_id == (candidate_leng[i]-1) or next_id == args.ignoreid or ended[i]:    # The last action is <end>
+                if next_id == (candidate_leng[i]-2) or next_id == args.ignoreid or ended[i]:    # The last action is <end>
                     cpu_a_t[i] = -1             # Change the <end> and ignore action to -1
+                elif next_id == (candidate_leng[i]-1):
+                    cpu_a_t[i] = -2
 
             # Make action and get the new state
             self.make_equiv_action(cpu_a_t, perm_obs, perm_idx, traj)
@@ -379,8 +402,22 @@ class Seq2SeqAgent(BaseAgent):
                         if action_idx == -1:                              # If the action now is end
                             if dist[i] < 3.0:                             # Correct
                                 reward[i] = 2.0 + ndtw_score[i] * 2.0
+                                if ob['swap']:
+                                    reward[i] -= 2                        
+                                else:
+                                    reward[i] += 1
                             else:                                         # Incorrect
                                 reward[i] = -2.0
+                        elif action_idx == -2:                             # NOT_FOUND reward 設定在這裏
+                            if dist[i] < 3.0:
+                                reward[i] = 2.0 + ndtw_score[i] * 2.0
+                                if ob['swap']:
+                                    reward[i] += 3                        # 偵測到錯誤 instruction,多加一分
+                                else:
+                                    reward[i] -= 2
+                            else:                                         # Incorrect
+                                reward[i] = -2.0
+                                reward[i] += 1                            # distance > 3, 確實沒找到東西，從扣二變成扣一
                         else:                                             # The action is not end
                             # Path fidelity rewards (distance & nDTW)
                             reward[i] = - (dist[i] - last_dist[i])
@@ -402,6 +439,7 @@ class Seq2SeqAgent(BaseAgent):
             # Update the finished actions
             # -1 means ended or ignored (already ended)
             ended[:] = np.logical_or(ended, (cpu_a_t == -1))
+            ended[:] = np.logical_or(ended, (cpu_a_t == -2))
 
             # Early exit if all ended
             if ended.all():

r2r_src/env.py

@@ -1,6 +1,8 @@
 ''' Batched Room-to-Room navigation environment '''
 
 import sys
+
+from networkx.algorithms import swap
 sys.path.append('buildpy36')
 sys.path.append('Matterport_Simulator/build/')
 import MatterSim
@@ -14,6 +16,7 @@ import os
 import random
 import networkx as nx
 from param import args
+import time
 
 from utils import load_datasets, load_nav_graphs, pad_instr_tokens
 from IPython import embed
@@ -127,6 +130,7 @@ class R2RBatch():
                             new_item = dict(item)
                             new_item['instr_id'] = '%s_%d' % (item['path_id'], j)
                             new_item['instructions'] = instr
+                            new_item['swap'] = item['swap'][j]
 
                             ''' BERT tokenizer '''
                             instr_tokens = tokenizer.tokenize(instr)
@@ -136,10 +140,12 @@ class R2RBatch():
                             if new_item['instr_encoding'] is not None:  # Filter the wrong data
                                 self.data.append(new_item)
                                 scans.append(item['scan'])
+
                         except:
                             continue
             print("split {} has {} datas in the file.".format(split, max_len))
 
+
         if name is None:
             self.name = splits[0] if len(splits) > 0 else "FAKE"
         else:
@@ -341,7 +347,8 @@ class R2RBatch():
                 'instructions' : item['instructions'],
                 'teacher' : self._shortest_path_action(state, item['path'][-1]),
                 'gt_path' : item['path'],
-                'path_id' : item['path_id']
+                'path_id' : item['path_id'],
+                'swap': item['swap']
             })
             if 'instr_encoding' in item:
                 obs[-1]['instr_encoding'] = item['instr_encoding']