diff --git a/model.py b/model.py
index 3743f9e..be0c612 100755
--- a/model.py
+++ b/model.py
@@ -26,13 +26,14 @@ class Model(nn.Module):
 
     def __init__(self, opt):
         super(Model, self).__init__()
+        self.opt = opt
         self.stages = {'Trans': opt.Transformation, 'Feat': opt.FeatureExtraction,
                        'Seq': opt.SequenceModeling, 'Pred': opt.Prediction}
 
         """ Transformation """
         if opt.Transformation == 'TPS':
             self.Transformation = TPS_SpatialTransformerNetwork(
-                F=opt.num_fiducial, I_size=(opt.imgH, opt.imgW), I_r_size=(opt.imgH, opt.imgW), batch_size=int(opt.batch_size/opt.num_gpu), I_channel_num=opt.input_channel)
+                F=opt.num_fiducial, I_size=(opt.imgH, opt.imgW), I_r_size=(opt.imgH, opt.imgW), I_channel_num=opt.input_channel)
         else:
             print('No Transformation module specified')
 
diff --git a/modules/feature_extraction.py b/modules/feature_extraction.py
old mode 100644
new mode 100755
index 8fe245b..b5f3004
--- a/modules/feature_extraction.py
+++ b/modules/feature_extraction.py
@@ -3,6 +3,7 @@ import torch.nn.functional as F
 
 
 class VGG_FeatureExtractor(nn.Module):
+    """ FeatureExtractor of CRNN (https://arxiv.org/pdf/1507.05717.pdf) """
 
     def __init__(self, input_channel, output_channel=512):
         super(VGG_FeatureExtractor, self).__init__()
@@ -28,6 +29,7 @@ class VGG_FeatureExtractor(nn.Module):
 
 
 class RCNN_FeatureExtractor(nn.Module):
+    """ FeatureExtractor of GRCNN (https://papers.nips.cc/paper/6637-gated-recurrent-convolution-neural-network-for-ocr.pdf) """
 
     def __init__(self, input_channel, output_channel=512):
         super(RCNN_FeatureExtractor, self).__init__()
@@ -50,6 +52,7 @@ class RCNN_FeatureExtractor(nn.Module):
 
 
 class ResNet_FeatureExtractor(nn.Module):
+    """ FeatureExtractor of FAN (http://openaccess.thecvf.com/content_ICCV_2017/papers/Cheng_Focusing_Attention_Towards_ICCV_2017_paper.pdf) """
 
     def __init__(self, input_channel, output_channel=512):
         super(ResNet_FeatureExtractor, self).__init__()
diff --git a/modules/transformation.py b/modules/transformation.py
index ecf62f2..893147d 100755
--- a/modules/transformation.py
+++ b/modules/transformation.py
@@ -7,7 +7,7 @@ import torch.nn.functional as F
 class TPS_SpatialTransformerNetwork(nn.Module):
     """ Rectification Network of RARE, namely TPS based STN """
 
-    def __init__(self, F, I_size, I_r_size, batch_size, I_channel_num=1):
+    def __init__(self, F, I_size, I_r_size, I_channel_num=1):
         """ Based on RARE TPS
         input:
             batch_I: Batch Input Image [batch_size x I_channel_num x I_height x I_width]
@@ -23,7 +23,7 @@ class TPS_SpatialTransformerNetwork(nn.Module):
         self.I_r_size = I_r_size  # = (I_r_height, I_r_width)
         self.I_channel_num = I_channel_num
         self.LocalizationNetwork = LocalizationNetwork(self.F, self.I_channel_num)
-        self.GridGenerator = GridGenerator(self.F, self.I_r_size, batch_size)
+        self.GridGenerator = GridGenerator(self.F, self.I_r_size)
 
     def forward(self, batch_I):
         batch_C_prime = self.LocalizationNetwork(batch_I)  # batch_size x K x 2
@@ -81,7 +81,7 @@ class LocalizationNetwork(nn.Module):
 class GridGenerator(nn.Module):
     """ Grid Generator of RARE, which produces P_prime by multipling T with P """
 
-    def __init__(self, F, I_r_size, batch_size):
+    def __init__(self, F, I_r_size):
         """ Generate P_hat and inv_delta_C for later """
         super(GridGenerator, self).__init__()
         self.eps = 1e-6
diff --git a/train.py b/train.py
index a025365..d0c74d6 100755
--- a/train.py
+++ b/train.py
@@ -180,7 +180,7 @@ def train(opt):
                     torch.save(model.state_dict(), f'./saved_models/{opt.experiment_name}/best_norm_ED.pth')
                 best_model_log = f'best_accuracy: {best_accuracy:0.3f}, best_norm_ED: {best_norm_ED:0.2f}'
                 print(best_model_log)
-                log.write(best_model_log+'\n')
+                log.write(best_model_log + '\n')
 
         # save model per 1e+5 iter.
         if (i + 1) % 1e+5 == 0:
@@ -259,14 +259,17 @@ if __name__ == '__main__':
     opt.num_gpu = torch.cuda.device_count()
     # print('device count', opt.num_gpu)
     if opt.num_gpu > 1:
-        opt.num_iter = int(opt.num_iter / opt.num_gpu)
-        opt.batch_size = opt.batch_size * opt.num_gpu
-        opt.workers = opt.workers * opt.num_gpu
         print('------ Use multi-GPU setting ------')
-        print('To equalize the number of epochs to 1-GPU setting, num_iter is divided with num_gpu by default.')
-        # If you dont care about it, just commnet out these line.)
-        print(f'The batch_size is multiplied with num_gpu and multiplied batch_size is {opt.batch_size}')
         print('if you stuck too long time with multi-GPU setting, try to set --workers 0')
         # check multi-GPU issue https://github.com/clovaai/deep-text-recognition-benchmark/issues/1
+        opt.workers = opt.workers * opt.num_gpu
+
+        """ previous version
+        print('To equlize batch stats to 1-GPU setting, the batch_size is multiplied with num_gpu and multiplied batch_size is ', opt.batch_size)
+        opt.batch_size = opt.batch_size * opt.num_gpu
+        print('To equalize the number of epochs to 1-GPU setting, num_iter is divided with num_gpu by default.')
+        If you dont care about it, just commnet out these line.)
+        opt.num_iter = int(opt.num_iter / opt.num_gpu)
+        """
 
     train(opt)