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Merge pull request #1223 from npcmaci/dev-postgresql
Add the implementation for the hematologic disease
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# | ||
# Licensed to the Apache Software Foundation (ASF) under one | ||
# or more contributor license agreements. See the NOTICE file | ||
# distributed with this work for additional information | ||
# regarding copyright ownership. The ASF licenses this file | ||
# to you under the Apache License, Version 2.0 (the | ||
# "License"); you may not use this file except in compliance | ||
# with the License. You may obtain a copy of the License at | ||
# | ||
# http://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, | ||
# software distributed under the License is distributed on an | ||
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | ||
# KIND, either express or implied. See the License for the | ||
# specific language governing permissions and limitations | ||
# under the License. | ||
# | ||
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import json | ||
import os | ||
import time | ||
from glob import glob | ||
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import numpy as np | ||
from PIL import Image | ||
from singa import device, layer, model, opt, tensor | ||
from tqdm import tqdm | ||
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from transforms import Compose, Normalize, ToTensor | ||
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np_dtype = {"float16": np.float16, "float32": np.float32} | ||
singa_dtype = {"float16": tensor.float16, "float32": tensor.float32} | ||
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class ClassDataset(object): | ||
"""Fetch data from file and generate batches. | ||
Load data from folder as PIL.Images and convert them into batch array. | ||
Args: | ||
img_folder (Str): Folder path of the training/validation images. | ||
transforms (Transform): Preprocess transforms. | ||
""" | ||
def __init__(self, img_folder, transforms): | ||
super(ClassDataset, self).__init__() | ||
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self.img_list = list() | ||
self.transforms = transforms | ||
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classes = os.listdir(img_folder) | ||
for i in classes: | ||
images = glob(os.path.join(img_folder, i, "*")) | ||
for img in images: | ||
self.img_list.append((img, i)) | ||
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def __len__(self) -> int: | ||
return len(self.img_list) | ||
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def __getitem__(self, index: int): | ||
img_path, label_str = self.img_list[index] | ||
img = Image.open(img_path) | ||
img = self.transforms.forward(img) | ||
label = np.array(label_str, dtype=np.int32) | ||
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return img, label | ||
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def batchgenerator(self, indexes, batch_size, data_size): | ||
"""Generate batch arrays from transformed image list. | ||
Args: | ||
indexes (Sequence): current batch indexes list, e.g. [n, n + 1, ..., n + batch_size] | ||
batch_size (int): | ||
data_size (Tuple): input image size of shape (C, H, W) | ||
Return: | ||
batch_x (Numpy ndarray): batch array of input images (B, C, H, W) | ||
batch_y (Numpy ndarray): batch array of ground truth lables (B,) | ||
""" | ||
batch_x = np.zeros((batch_size,) + data_size) | ||
batch_y = np.zeros((batch_size,) + (1,), dtype=np.int32) | ||
for idx, i in enumerate(indexes): | ||
sample_x, sample_y = self.__getitem__(i) | ||
batch_x[idx, :, :, :] = sample_x | ||
batch_y[idx, :] = sample_y | ||
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return batch_x, batch_y | ||
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class CNNModel(model.Model): | ||
def __init__(self, num_classes): | ||
super(CNNModel, self).__init__() | ||
self.input_size = 28 | ||
self.dimension = 4 | ||
self.num_classes = num_classes | ||
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self.layer1 = layer.Conv2d(16, kernel_size=3, activation="RELU") | ||
self.bn1 = layer.BatchNorm2d() | ||
self.layer2 = layer.Conv2d(16, kernel_size=3, activation="RELU") | ||
self.bn2 = layer.BatchNorm2d() | ||
self.pooling2 = layer.MaxPool2d(kernel_size=2, stride=2) | ||
self.layer3 = layer.Conv2d(64, kernel_size=3, activation="RELU") | ||
self.bn3 = layer.BatchNorm2d() | ||
self.layer4 = layer.Conv2d(64, kernel_size=3, activation="RELU") | ||
self.bn4 = layer.BatchNorm2d() | ||
self.layer5 = layer.Conv2d(64, kernel_size=3, padding=1, activation="RELU") | ||
self.bn5 = layer.BatchNorm2d() | ||
self.pooling5 = layer.MaxPool2d(kernel_size=2, stride=2) | ||
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self.flatten = layer.Flatten() | ||
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self.linear1 = layer.Linear(128) | ||
self.linear2 = layer.Linear(128) | ||
self.linear3 = layer.Linear(self.num_classes) | ||
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self.relu = layer.ReLU() | ||
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self.softmax_cross_entropy = layer.SoftMaxCrossEntropy() | ||
self.dropout = layer.Dropout(ratio=0.3) | ||
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def forward(self, x): | ||
x = self.layer1(x) | ||
x = self.bn1(x) | ||
x = self.layer2(x) | ||
x = self.bn2(x) | ||
x = self.pooling2(x) | ||
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x = self.layer3(x) | ||
x = self.bn3(x) | ||
x = self.layer4(x) | ||
x = self.bn4(x) | ||
x = self.layer5(x) | ||
x = self.bn5(x) | ||
x = self.pooling5(x) | ||
x = self.flatten(x) | ||
x = self.linear1(x) | ||
x = self.relu(x) | ||
x = self.linear2(x) | ||
x = self.relu(x) | ||
x = self.linear3(x) | ||
return x | ||
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def set_optimizer(self, optimizer): | ||
self.optimizer = optimizer | ||
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def train_one_batch(self, x, y, dist_option, spars): | ||
out = self.forward(x) | ||
loss = self.softmax_cross_entropy(out, y) | ||
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if dist_option == 'plain': | ||
self.optimizer(loss) | ||
elif dist_option == 'half': | ||
self.optimizer.backward_and_update_half(loss) | ||
elif dist_option == 'partialUpdate': | ||
self.optimizer.backward_and_partial_update(loss) | ||
elif dist_option == 'sparseTopK': | ||
self.optimizer.backward_and_sparse_update(loss, | ||
topK=True, | ||
spars=spars) | ||
elif dist_option == 'sparseThreshold': | ||
self.optimizer.backward_and_sparse_update(loss, | ||
topK=False, | ||
spars=spars) | ||
return out, loss | ||
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def accuracy(pred, target): | ||
"""Compute recall accuracy. | ||
Args: | ||
pred (Numpy ndarray): Prediction array, should be in shape (B, C) | ||
target (Numpy ndarray): Ground truth array, should be in shape (B, ) | ||
Return: | ||
correct (Float): Recall accuracy | ||
""" | ||
# y is network output to be compared with ground truth (int) | ||
y = np.argmax(pred, axis=1) | ||
a = (y[:,None]==target).sum() | ||
correct = np.array(a, "int").sum() | ||
return correct | ||
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# Define pre-processing methods (transforms) | ||
transforms = Compose([ | ||
ToTensor(), | ||
Normalize([0.485, 0.456, 0.406], [0.229, 0.224, 0.225]) | ||
]) | ||
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# Dataset loading | ||
dataset_path = "./bloodmnist" | ||
train_path = os.path.join(dataset_path, "train") | ||
val_path = os.path.join(dataset_path, "val") | ||
cfg_path = os.path.join(dataset_path, "param.json") | ||
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with open(cfg_path,'r') as load_f: | ||
num_class = json.load(load_f)["num_classes"] | ||
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train_dataset = ClassDataset(train_path, transforms) | ||
val_dataset = ClassDataset(val_path, transforms) | ||
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batch_size = 256 | ||
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# Model configuration for CNN | ||
model = CNNModel(num_classes=num_class) | ||
criterion = layer.SoftMaxCrossEntropy() | ||
optimizer_ft = opt.Adam(lr=1e-3) | ||
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# Start training | ||
dev = device.create_cpu_device() | ||
dev.SetRandSeed(0) | ||
np.random.seed(0) | ||
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tx = tensor.Tensor( | ||
(batch_size, 3, model.input_size, model.input_size), dev, | ||
singa_dtype['float32']) | ||
ty = tensor.Tensor((batch_size,), dev, tensor.int32) | ||
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num_train_batch = train_dataset.__len__() // batch_size | ||
num_val_batch = val_dataset.__len__() // batch_size | ||
idx = np.arange(train_dataset.__len__(), dtype=np.int32) | ||
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model.set_optimizer(optimizer_ft) | ||
model.compile([tx], is_train=True, use_graph=False, sequential=False) | ||
dev.SetVerbosity(0) | ||
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max_epoch = 100 | ||
for epoch in range(max_epoch): | ||
print(f'Epoch {epoch}:') | ||
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start_time = time.time() | ||
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train_correct = np.zeros(shape=[1], dtype=np.float32) | ||
test_correct = np.zeros(shape=[1], dtype=np.float32) | ||
train_loss = np.zeros(shape=[1], dtype=np.float32) | ||
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# Training part | ||
model.train() | ||
for b in tqdm(range(num_train_batch)): | ||
# Extract batch from image list | ||
x, y = train_dataset.batchgenerator(idx[b * batch_size:(b + 1) * batch_size], | ||
batch_size=batch_size, data_size=(3, model.input_size, model.input_size)) | ||
x = x.astype(np_dtype['float32']) | ||
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tx.copy_from_numpy(x) | ||
ty.copy_from_numpy(y) | ||
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out, loss = model(tx, ty, dist_option="plain", spars=None) | ||
train_correct += accuracy(tensor.to_numpy(out), y) | ||
train_loss += tensor.to_numpy(loss)[0] | ||
print('Training loss = %f, training accuracy = %f' % | ||
(train_loss, train_correct / | ||
(num_train_batch * batch_size))) | ||
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# Validation part | ||
model.eval() | ||
for b in tqdm(range(num_val_batch)): | ||
x, y = train_dataset.batchgenerator(idx[b * batch_size:(b + 1) * batch_size], | ||
batch_size=batch_size, data_size=(3, model.input_size, model.input_size)) | ||
x = x.astype(np_dtype['float32']) | ||
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tx.copy_from_numpy(x) | ||
ty.copy_from_numpy(y) | ||
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out = model(tx) | ||
test_correct += accuracy(tensor.to_numpy(out), y) | ||
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print('Evaluation accuracy = %f, Elapsed Time = %fs' % | ||
(test_correct / (num_val_batch * batch_size), | ||
time.time() - start_time)) |