deep-text-recognition-benchmark
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clovaai
Poor predictions when deploying a custom model on Arabic
Following this link instructions https://github.com/JaidedAI/EasyOCR/blob/master/custom_model.md. I have trained a custom model on my own dataset.
Here is the .yml file I used:
network_params:
hidden_size: 512
input_channel: 1
output_channel: 512
hidden_size: 512
imgH: 64
imgW: 600
lang_list:
- 'en'
character_list: "0123456789!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~ abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ٠١٢٣٤٥٦٧٨٩«»؟،؛ءآأؤإئااًبةتثجحخدذرزسشصضطظعغفقكلمنهوىيٱٹپچڈڑژکڭگںھۀہۂۃۆۇۈۋیېےۓە"
number: '1234567890١٢٣٤٥٦٧٨٩٠'
The .py file:
import torch
import torch.nn as nn
import torch.nn.init as init
import torchvision
from torchvision import models
from collections import namedtuple
from packaging import version
def init_weights(modules):
for m in modules:
if isinstance(m, nn.Conv2d):
init.xavier_uniform_(m.weight.data)
if m.bias is not None:
m.bias.data.zero_()
elif isinstance(m, nn.BatchNorm2d):
m.weight.data.fill_(1)
m.bias.data.zero_()
elif isinstance(m, nn.Linear):
m.weight.data.normal_(0, 0.01)
m.bias.data.zero_()
class vgg16_bn(torch.nn.Module):
def __init__(self, pretrained=True, freeze=True):
super(vgg16_bn, self).__init__()
if version.parse(torchvision.__version__) >= version.parse('0.13'):
vgg_pretrained_features = models.vgg16_bn(
weights=models.VGG16_BN_Weights.DEFAULT if pretrained else None
).features
else: #torchvision.__version__ < 0.13
models.vgg.model_urls['vgg16_bn'] = models.vgg.model_urls['vgg16_bn'].replace('https://', 'http://')
vgg_pretrained_features = models.vgg16_bn(pretrained=pretrained).features
self.slice1 = torch.nn.Sequential()
self.slice2 = torch.nn.Sequential()
self.slice3 = torch.nn.Sequential()
self.slice4 = torch.nn.Sequential()
self.slice5 = torch.nn.Sequential()
for x in range(12): # conv2_2
self.slice1.add_module(str(x), vgg_pretrained_features[x])
for x in range(12, 19): # conv3_3
self.slice2.add_module(str(x), vgg_pretrained_features[x])
for x in range(19, 29): # conv4_3
self.slice3.add_module(str(x), vgg_pretrained_features[x])
for x in range(29, 39): # conv5_3
self.slice4.add_module(str(x), vgg_pretrained_features[x])
# fc6, fc7 without atrous conv
self.slice5 = torch.nn.Sequential(
nn.MaxPool2d(kernel_size=3, stride=1, padding=1),
nn.Conv2d(512, 1024, kernel_size=3, padding=6, dilation=6),
nn.Conv2d(1024, 1024, kernel_size=1)
)
if not pretrained:
init_weights(self.slice1.modules())
init_weights(self.slice2.modules())
init_weights(self.slice3.modules())
init_weights(self.slice4.modules())
init_weights(self.slice5.modules()) # no pretrained model for fc6 and fc7
if freeze:
for param in self.slice1.parameters(): # only first conv
param.requires_grad= False
def forward(self, X):
h = self.slice1(X)
h_relu2_2 = h
h = self.slice2(h)
h_relu3_2 = h
h = self.slice3(h)
h_relu4_3 = h
h = self.slice4(h)
h_relu5_3 = h
h = self.slice5(h)
h_fc7 = h
vgg_outputs = namedtuple("VggOutputs", ['fc7', 'relu5_3', 'relu4_3', 'relu3_2', 'relu2_2'])
out = vgg_outputs(h_fc7, h_relu5_3, h_relu4_3, h_relu3_2, h_relu2_2)
return out
class BidirectionalLSTM(nn.Module):
def __init__(self, input_size, hidden_size, output_size):
super(BidirectionalLSTM, self).__init__()
self.rnn = nn.LSTM(input_size, hidden_size, bidirectional=True, batch_first=True)
self.linear = nn.Linear(hidden_size * 2, output_size)
def forward(self, input):
"""
input : visual feature [batch_size x T x input_size]
output : contextual feature [batch_size x T x output_size]
"""
try: # multi gpu needs this
self.rnn.flatten_parameters()
except: # quantization doesn't work with this
pass
recurrent, _ = self.rnn(input) # batch_size x T x input_size -> batch_size x T x (2*hidden_size)
output = self.linear(recurrent) # batch_size x T x output_size
return output
class VGG_FeatureExtractor(nn.Module):
def __init__(self, input_channel, output_channel=512):
super(VGG_FeatureExtractor, self).__init__()
self.output_channel = [int(output_channel / 8), int(output_channel / 4),
int(output_channel / 2), output_channel]
self.ConvNet = nn.Sequential(
nn.Conv2d(input_channel, self.output_channel[0], 3, 1, 1), nn.ReLU(True),
nn.MaxPool2d(2, 2),
nn.Conv2d(self.output_channel[0], self.output_channel[1], 3, 1, 1), nn.ReLU(True),
nn.MaxPool2d(2, 2),
nn.Conv2d(self.output_channel[1], self.output_channel[2], 3, 1, 1), nn.ReLU(True),
nn.Conv2d(self.output_channel[2], self.output_channel[2], 3, 1, 1), nn.ReLU(True),
nn.MaxPool2d((2, 1), (2, 1)),
nn.Conv2d(self.output_channel[2], self.output_channel[3], 3, 1, 1, bias=False),
nn.BatchNorm2d(self.output_channel[3]), nn.ReLU(True),
nn.Conv2d(self.output_channel[3], self.output_channel[3], 3, 1, 1, bias=False),
nn.BatchNorm2d(self.output_channel[3]), nn.ReLU(True),
nn.MaxPool2d((2, 1), (2, 1)),
nn.Conv2d(self.output_channel[3], self.output_channel[3], 2, 1, 0), nn.ReLU(True))
def forward(self, input):
return self.ConvNet(input)
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__()
self.ConvNet = ResNet(input_channel, output_channel, BasicBlock, [1, 2, 5, 3])
def forward(self, input):
return self.ConvNet(input)
class BasicBlock(nn.Module):
expansion = 1
def __init__(self, inplanes, planes, stride=1, downsample=None):
super(BasicBlock, self).__init__()
self.conv1 = self._conv3x3(inplanes, planes)
self.bn1 = nn.BatchNorm2d(planes)
self.conv2 = self._conv3x3(planes, planes)
self.bn2 = nn.BatchNorm2d(planes)
self.relu = nn.ReLU(inplace=True)
self.downsample = downsample
self.stride = stride
def _conv3x3(self, in_planes, out_planes, stride=1):
"3x3 convolution with padding"
return nn.Conv2d(in_planes, out_planes, kernel_size=3, stride=stride,
padding=1, bias=False)
def forward(self, x):
residual = x
out = self.conv1(x)
out = self.bn1(out)
out = self.relu(out)
out = self.conv2(out)
out = self.bn2(out)
if self.downsample is not None:
residual = self.downsample(x)
out += residual
out = self.relu(out)
return out
class ResNet(nn.Module):
def __init__(self, input_channel, output_channel, block, layers):
super(ResNet, self).__init__()
self.output_channel_block = [int(output_channel / 4), int(output_channel / 2), output_channel, output_channel]
self.inplanes = int(output_channel / 8)
self.conv0_1 = nn.Conv2d(input_channel, int(output_channel / 16),
kernel_size=3, stride=1, padding=1, bias=False)
self.bn0_1 = nn.BatchNorm2d(int(output_channel / 16))
self.conv0_2 = nn.Conv2d(int(output_channel / 16), self.inplanes,
kernel_size=3, stride=1, padding=1, bias=False)
self.bn0_2 = nn.BatchNorm2d(self.inplanes)
self.relu = nn.ReLU(inplace=True)
self.maxpool1 = nn.MaxPool2d(kernel_size=2, stride=2, padding=0)
self.layer1 = self._make_layer(block, self.output_channel_block[0], layers[0])
self.conv1 = nn.Conv2d(self.output_channel_block[0], self.output_channel_block[
0], kernel_size=3, stride=1, padding=1, bias=False)
self.bn1 = nn.BatchNorm2d(self.output_channel_block[0])
self.maxpool2 = nn.MaxPool2d(kernel_size=2, stride=2, padding=0)
self.layer2 = self._make_layer(block, self.output_channel_block[1], layers[1], stride=1)
self.conv2 = nn.Conv2d(self.output_channel_block[1], self.output_channel_block[
1], kernel_size=3, stride=1, padding=1, bias=False)
self.bn2 = nn.BatchNorm2d(self.output_channel_block[1])
self.maxpool3 = nn.MaxPool2d(kernel_size=2, stride=(2, 1), padding=(0, 1))
self.layer3 = self._make_layer(block, self.output_channel_block[2], layers[2], stride=1)
self.conv3 = nn.Conv2d(self.output_channel_block[2], self.output_channel_block[
2], kernel_size=3, stride=1, padding=1, bias=False)
self.bn3 = nn.BatchNorm2d(self.output_channel_block[2])
self.layer4 = self._make_layer(block, self.output_channel_block[3], layers[3], stride=1)
self.conv4_1 = nn.Conv2d(self.output_channel_block[3], self.output_channel_block[
3], kernel_size=2, stride=(2, 1), padding=(0, 1), bias=False)
self.bn4_1 = nn.BatchNorm2d(self.output_channel_block[3])
self.conv4_2 = nn.Conv2d(self.output_channel_block[3], self.output_channel_block[
3], kernel_size=2, stride=1, padding=0, bias=False)
self.bn4_2 = nn.BatchNorm2d(self.output_channel_block[3])
def _make_layer(self, block, planes, blocks, stride=1):
downsample = None
if stride != 1 or self.inplanes != planes * block.expansion:
downsample = nn.Sequential(
nn.Conv2d(self.inplanes, planes * block.expansion,
kernel_size=1, stride=stride, bias=False),
nn.BatchNorm2d(planes * block.expansion),
)
layers = []
layers.append(block(self.inplanes, planes, stride, downsample))
self.inplanes = planes * block.expansion
for i in range(1, blocks):
layers.append(block(self.inplanes, planes))
return nn.Sequential(*layers)
def forward(self, x):
x = self.conv0_1(x)
x = self.bn0_1(x)
x = self.relu(x)
x = self.conv0_2(x)
x = self.bn0_2(x)
x = self.relu(x)
x = self.maxpool1(x)
x = self.layer1(x)
x = self.conv1(x)
x = self.bn1(x)
x = self.relu(x)
x = self.maxpool2(x)
x = self.layer2(x)
x = self.conv2(x)
x = self.bn2(x)
x = self.relu(x)
x = self.maxpool3(x)
x = self.layer3(x)
x = self.conv3(x)
x = self.bn3(x)
x = self.relu(x)
x = self.layer4(x)
x = self.conv4_1(x)
x = self.bn4_1(x)
x = self.relu(x)
x = self.conv4_2(x)
x = self.bn4_2(x)
x = self.relu(x)
return x
class Model(nn.Module):
def __init__(self, input_channel, output_channel, hidden_size, num_class):
super(Model, self).__init__()
""" FeatureExtraction """
self.FeatureExtraction = ResNet_FeatureExtractor(input_channel, output_channel)
self.FeatureExtraction_output = output_channel # int(imgH/16-1) * 512
self.AdaptiveAvgPool = nn.AdaptiveAvgPool2d((None, 1)) # Transform final (imgH/16-1) -> 1
""" Sequence modeling"""
self.SequenceModeling = nn.Sequential(
BidirectionalLSTM(self.FeatureExtraction_output, hidden_size, hidden_size),
BidirectionalLSTM(hidden_size, hidden_size, hidden_size))
self.SequenceModeling_output = hidden_size
""" Prediction """
self.Prediction = nn.Linear(self.SequenceModeling_output, num_class)
def forward(self, input, text):
""" Feature extraction stage """
visual_feature = self.FeatureExtraction(input)
visual_feature = self.AdaptiveAvgPool(visual_feature.permute(0, 3, 1, 2)) # [b, c, h, w] -> [b, w, c, h]
visual_feature = visual_feature.squeeze(3)
""" Sequence modeling stage """
contextual_feature = self.SequenceModeling(visual_feature)
""" Prediction stage """
prediction = self.Prediction(contextual_feature.contiguous())
return prediction
Then i predict like this:
ar_reader = easyocr.Reader(['en'], recog_network='arabic')
ar_reader.readtext(image_path,paragraph=True)
Even I get very bad results on the training images that I had taken with 100% accuracy Is it the same for you or do you get good accuracy on the training data in the test phase? @MohieEldinMuhammad @amroghoneim
@amroghoneim @ftmasadi @MohieEldinMuhammad Any updates guys? I have a similar problem.
Even I get very bad results on the training images that I had taken with 100% accuracy Is it the same for you or do you get good accuracy on the training data in the test phase? @MohieEldinMuhammad @amroghoneim
actually i was overfitting on 2 images only to test the whole pipeline first, so the problem now is that the fine-tuned model is not working properly on deployment phase, hence no need to wast time in training unless the problem is solved
@amroghoneim @ftmasadi @MohieEldinMuhammad Any updates guys? I have a similar problem.
No, unfortunately.
@amroghoneim @ftmasadi @MohieEldinMuhammad Any updates guys? I have a similar problem.
May I ask what exactly is your problem? And in which part of your results are there problems? @Arunavameister
Even I get very bad results on the training images that I had taken with 100% accuracy Is it the same for you or do you get good accuracy on the training data in the test phase? @MohieEldinMuhammad @amroghoneim
actually i was overfitting on 2 images only to test the whole pipeline first, so the problem now is that the fine-tuned model is not working properly on deployment phase, hence no need to wast time in training unless the problem is solved
Thank you for your reply But I still don't understand what I should do to solve my problem, even though I spent a lot of time on it. Is it possible for you to explain more about this problem? Thank you very much for your help @MohieEldinMuhammad
@ftmasadi I am getting random results during test predictions even though in training I had about 75% accuracy. I will post an update if I manage to make it work
@Arunavameister thanks for the help, i hope you will figure it out 🙏
Thank you very much for your reply. What language do you work on? Because I think this problem is mostly in languages that have a continuous structure like Arabic, Farsi, and Urdu because I didn't encounter such a problem when I used the English database of the site. What is your opinion about this? @Arunavameister
Facing same issue . I am trying to solve this problem. I'll report here if I handled this problem.
thanks for the help, I still don't understand what I should do to solve this problem @masoudMZB
@hayderkharrufa @ftmasadi there are many reasons why you can't get proper ouput
- characters ordering in config file
- different backbone
- etc. by the way I suggest you to forget this repo and easyocr check paddleocr
Do you guys have any updates? Im also getting 85% accuracy when training. And then when I try to use the model with THE SAME pictures as I used for training/evaluation I get much lower accuracy.
