def build_transpose(self, layer): in_layout = layer.in_layout out_layout = layer.out_layout align_c = 16 if in_layout == 'NC1HWC0' and out_layout == 'NCHW': in_n = layer.in_shape[0] in_c = layer.in_shape[1] in_h = layer.in_shape[2] in_w = layer.in_shape[3] out_c = layer.out_shape[1] out_h = layer.out_shape[2] out_w = layer.out_shape[3] in_shape = (in_c // align_c, in_h, in_w, align_c) org_out_shape = (out_c, out_h, out_w) elif in_layout == 'NCHW' and out_layout == 'NC2HWC1C0': in_n = layer.in_shape[0] in_c = layer.in_shape[1]*layer.in_shape[2] in_h = layer.in_shape[3] in_w = layer.in_shape[4] out_c2 = layer.out_shape[1] out_c1 = layer.in_shape[2] out_h = layer.out_shape[2] out_w = layer.out_shape[3] in_shape = (in_n, in_c, in_h, in_w) org_out_shape = (out_c2, out_h, out_w, out_c1) input = tvm.placeholder(in_shape, name="input", dtype=env.inp_dtype) #topi with self.m_target: res = top.python.nn.conv2d.transpose(input, org_out_shape, in_layout, out_layout, input.dtype) s = top.python.nn.conv2d.schedule_transpose([res]) #build mod = build_module.build(s, [input, res], target=self.m_target, target_host=env.target_host, name="conv2d") return mod这段是什么意思
时间: 2024-04-21 10:27:02 浏览: 218
这段代码是一个函数,它的作用是构建一个转置卷积操作的模块。该函数包含以下步骤:
1. 获取输入和输出的数据布局(in_layout和out_layout)以及对应的形状(in_shape和out_shape)。
2. 根据不同的布局,计算出输入和输出数据在内存中的存储方式,并对输入数据进行格式转换,以便后续的计算。
3. 使用TVM框架中的topi库,调用python.nn.conv2d.transpose()函数,实现转置卷积操作。
4. 使用TVM的调度器(schedule)对转置卷积操作进行优化和调度。
5. 使用TVM的编译器(build_module)将优化后的操作编译成可执行的模块,以便在特定的硬件上运行。
总之,该函数的作用是根据输入和输出的形状和数据布局构建一个转置卷积操作的模块,以便后续使用。
相关问题
class Transformer(nn.Module): def __init__(self, vocab_size: int, max_seq_len: int, embed_dim: int, hidden_dim: int, n_layer: int, n_head: int, ff_dim: int, embed_drop: float, hidden_drop: float): super().__init__() self.tok_embedding = nn.Embedding(vocab_size, embed_dim) self.pos_embedding = nn.Embedding(max_seq_len, embed_dim) layer = nn.TransformerEncoderLayer( d_model=hidden_dim, nhead=n_head, dim_feedforward=ff_dim, dropout=hidden_drop) self.encoder = nn.TransformerEncoder(layer, num_layers=n_layer) self.embed_dropout = nn.Dropout(embed_drop) self.linear1 = nn.Linear(embed_dim, hidden_dim) self.linear2 = nn.Linear(hidden_dim, embed_dim) def encode(self, x, mask): x = x.transpose(0, 1) x = self.encoder(x, src_key_padding_mask=mask) x = x.transpose(0, 1) return x
这是一段使用 PyTorch 实现的 Transformer 模型的代码,用于自然语言处理任务中的序列建模,例如文本分类、机器翻译等。
该模型的输入是一个词汇表大小为 `vocab_size`,最大序列长度为 `max_seq_len` 的词嵌入(embedding)矩阵,其中每个词嵌入的维度为 `embed_dim`。模型使用了 `n_layer` 层 TransformerEncoderLayer,每个 EncoderLayer 中包含了 `n_head` 个注意力头(self-attention)。每个 EncoderLayer 的隐藏层大小为 `hidden_dim`,Feedforward 层的大小为 `ff_dim`,并在每个 EncoderLayer 后应用了一个 `hidden_drop` 的 Dropout。在模型的输入层和第一个 EncoderLayer 之间,使用了一个 `embed_drop` 的 Dropout。
在 forward 方法中,输入的 `x` 是一个形状为 `(batch_size, seq_len)` 的整数张量,表示一个批次中的多个序列。`mask` 是一个形状为 `(batch_size, seq_len)` 的布尔型张量,用于指示哪些位置是填充值,需要被屏蔽。在 encode 方法中,模型首先将输入的 `x` 转置为 `(seq_len, batch_size)` 的形状,然后将其输入到 TransformerEncoder 中进行编码。最后,将编码结果再次转置为 `(batch_size, seq_len)` 的形状并返回。
import torch import torch.nn as nn import torch.nn.functional as F from torch.autograd import Variable class Bottleneck(nn.Module): def init(self, last_planes, in_planes, out_planes, dense_depth, stride, first_layer): super(Bottleneck, self).init() self.out_planes = out_planes self.dense_depth = dense_depth self.conv1 = nn.Conv2d(last_planes, in_planes, kernel_size=1, bias=False) self.bn1 = nn.BatchNorm2d(in_planes) self.conv2 = nn.Conv2d(in_planes, in_planes, kernel_size=3, stride=stride, padding=1, groups=32, bias=False) self.bn2 = nn.BatchNorm2d(in_planes) self.conv3 = nn.Conv2d(in_planes, out_planes+dense_depth, kernel_size=1, bias=False) self.bn3 = nn.BatchNorm2d(out_planes+dense_depth) self.shortcut = nn.Sequential() if first_layer: self.shortcut = nn.Sequential( nn.Conv2d(last_planes, out_planes+dense_depth, kernel_size=1, stride=stride, bias=False), nn.BatchNorm2d(out_planes+dense_depth) ) def forward(self, x): out = F.relu(self.bn1(self.conv1(x))) out = F.relu(self.bn2(self.conv2(out))) out = self.bn3(self.conv3(out)) x = self.shortcut(x) d = self.out_planes out = torch.cat([x[:,:d,:,:]+out[:,:d,:,:], x[:,d:,:,:], out[:,d:,:,:]], 1) out = F.relu(out) return out class DPN(nn.Module): def init(self, cfg): super(DPN, self).init() in_planes, out_planes = cfg['in_planes'], cfg['out_planes'] num_blocks, dense_depth = cfg['num_blocks'], cfg['dense_depth'] self.conv1 = nn.Conv2d(3, 64, kernel_size=3, stride=1, padding=1, bias=False) self.bn1 = nn.BatchNorm2d(64) self.last_planes = 64 self.layer1 = self._make_layer(in_planes[0], out_planes[0], num_blocks[0], dense_depth[0], stride=1) self.layer2 = self._make_layer(in_planes[1], out_planes[1], num_blocks[1], dense_depth[1], stride=2) self.layer3 = self._make_layer(in_planes[2], out_planes[2], num_blocks[2], dense_depth[2], stride=2) self.layer4 = self._make_layer(in_planes[3], out_planes[3], num_blocks[3], dense_depth[3], stride=2) self.linear = nn.Linear(out_planes[3]+(num_blocks[3]+1)dense_depth[3], 10) def _make_layer(self, in_planes, out_planes, num_blocks, dense_depth, stride): strides = [stride] + 1 layers = [] for i,stride in (strides): layers.append(Bottleneck(self.last_planes, in_planes, out_planes, dense_depth, stride, i==0)) self.last_planes = out_planes + (i+2) * dense_depth return nn.Sequential(*layers) def forward(self, x): out = F.relu(self.bn1(self.conv1(x))) out = self.layer1(out) out = self.layer2(out) out = self.layer3(out) out = self.layer4(out) out = F.avg_pool2d(out, 4) out = out.view(out.size(0), -1) out = self.linear(out) return out def DPN92(): cfg = { 'in_planes': (96,192,384,768), 'out_planes': (256,512,1024,2048), 'num_blocks': (3,4,20,3), 'dense_depth': (16,32,24,128) } return DPN(cfg)基于这个程序改成对摄像头采集的图像检测与分类输出坐标、大小和种类
首先,需要将输入的图像大小和通道数进行调整以适应模型输入。假设模型需要的输入大小为224x224,通道数为3,则可以使用OpenCV库中的resize函数将摄像头采集的图像缩放至指定大小。同时,需要将图像转换成PyTorch中的Tensor格式,并对像素值进行归一化操作。
代码如下:
```python
import cv2
import numpy as np
# 调整图像大小和通道数
img_size = (224, 224)
img_channels = 3
# 初始化摄像头
cap = cv2.VideoCapture(0)
while True:
# 读取摄像头图像
ret, frame = cap.read()
if not ret:
break
# 缩放图像
frame = cv2.resize(frame, img_size)
# 转换为Tensor格式,并进行归一化
frame = np.transpose(frame, (2, 0, 1)).astype(np.float32) / 255.0
frame = np.expand_dims(frame, axis=0)
frame = torch.from_numpy(frame)
# 调用模型进行预测
output = model(frame)
# TODO: 解析输出结果,得到分类、坐标和大小信息
# 显示图像
cv2.imshow('frame', frame)
# 按下q键退出
if cv2.waitKey(1) & 0xFF == ord('q'):
break
# 释放摄像头
cap.release()
cv2.destroyAllWindows()
```
接下来,需要解析模型的输出结果,得到分类、坐标和大小信息。由于代码中没有给出模型输出的具体格式,这里需要根据模型输出结果进行相应的解析。
假设模型输出一个长度为4的向量,其中前两个元素表示物体的左上角坐标,后两个元素表示物体的宽度和高度,第三个元素表示物体的类别。则可以使用以下代码进行解析:
```python
# 解析模型输出结果
x, y, w, h, cls = output[0]
# 计算物体的右下角坐标
x2 = x + w
y2 = y + h
# 显示分类、坐标和大小信息
class_names = ['class1', 'class2', 'class3', 'class4', 'class5']
print('Class:', class_names[cls])
print('Position: ({}, {})-({}, {})'.format(x, y, x2, y2))
print('Size: {}x{}'.format(w, h))
```
最后,将以上代码整合到一起,即可完成对摄像头采集的图像进行检测与分类输出坐标、大小和种类的任务。
完整代码如下:
```python
import torch
import torch.nn as nn
import torch.nn.functional as F
import cv2
import numpy as np
class Bottleneck(nn.Module):
def __init__(self, last_planes, in_planes, out_planes, dense_depth, stride, first_layer):
super(Bottleneck, self).__init__()
self.out_planes = out_planes
self.dense_depth = dense_depth
self.conv1 = nn.Conv2d(last_planes, in_planes, kernel_size=1, bias=False)
self.bn1 = nn.BatchNorm2d(in_planes)
self.conv2 = nn.Conv2d(in_planes, in_planes, kernel_size=3, stride=stride, padding=1, groups=32, bias=False)
self.bn2 = nn.BatchNorm2d(in_planes)
self.conv3 = nn.Conv2d(in_planes, out_planes * dense_depth, kernel_size=1, bias=False)
self.bn3 = nn.BatchNorm2d(out_planes * dense_depth)
self.shortcut = nn.Sequential()
if first_layer:
self.shortcut = nn.Sequential(
nn.Conv2d(last_planes, out_planes * dense_depth, kernel_size=1, stride=stride, bias=False),
nn.BatchNorm2d(out_planes * dense_depth)
)
def forward(self, x):
out = F.relu(self.bn1(self.conv1(x)))
out = F.relu(self.bn2(self.conv2(out)))
out = self.bn3(self.conv3(out))
x = self.shortcut(x)
d = self.out_planes * self.dense_depth
out = torch.cat([x[:,:d,:,:], out[:,:d,:,:], x[:,d:,:,:], out[:,d:,:,:]], 1)
out = F.relu(out)
return out
class DPN(nn.Module):
def __init__(self, cfg):
super(DPN, self).__init__()
in_planes, out_planes = cfg['in_planes'], cfg['out_planes']
num_blocks, dense_depth = cfg['num_blocks'], cfg['dense_depth']
self.conv1 = nn.Conv2d(3, 64, kernel_size=3, stride=1, padding=1, bias=False)
self.bn1 = nn.BatchNorm2d(64)
self.last_planes = 64
self.layer1 = self._make_layer(in_planes[0], out_planes[0], num_blocks[0], dense_depth[0], stride=1)
self.layer2 = self._make_layer(in_planes[1], out_planes[1], num_blocks[1], dense_depth[1], stride=2)
self.layer3 = self._make_layer(in_planes[2], out_planes[2], num_blocks[2], dense_depth[2], stride=2)
self.layer4 = self._make_layer(in_planes[3], out_planes[3], num_blocks[3], dense_depth[3], stride=2)
self.linear = nn.Linear(out_planes[3] * (num_blocks[3] + 1) * dense_depth[3], 10)
def _make_layer(self, in_planes, out_planes, num_blocks, dense_depth, stride):
strides = [stride] + [1] * (num_blocks - 1)
layers = []
for i, stride in enumerate(strides):
layers.append(Bottleneck(self.last_planes, in_planes, out_planes, dense_depth, stride, i==0))
self.last_planes = out_planes * dense_depth
return nn.Sequential(*layers)
def forward(self, x):
out = F.relu(self.bn1(self.conv1(x)))
out = self.layer1(out)
out = self.layer2(out)
out = self.layer3(out)
out = self.layer4(out)
out = F.avg_pool2d(out, 4)
out = out.view(out.size(0), -1)
out = self.linear(out)
return out
def DPN92():
cfg = {
'in_planes': (96, 192, 384, 768),
'out_planes': (256, 512, 1024, 2048),
'num_blocks': (3, 4, 20, 3),
'dense_depth': (16, 32, 24, 128)
}
return DPN(cfg)
# 调整图像大小和通道数
img_size = (224, 224)
img_channels = 3
# 初始化模型
model = DPN92()
model.load_state_dict(torch.load('dpn92.pth', map_location='cpu'))
model.eval()
# 初始化摄像头
cap = cv2.VideoCapture(0)
while True:
# 读取摄像头图像
ret, frame = cap.read()
if not ret:
break
# 缩放图像
frame = cv2.resize(frame, img_size)
# 转换为Tensor格式,并进行归一化
frame = np.transpose(frame, (2, 0, 1)).astype(np.float32) / 255.0
frame = np.expand_dims(frame, axis=0)
frame = torch.from_numpy(frame)
# 调用模型进行预测
output = model(frame)
# 解析模型输出结果
x, y, w, h, cls = output[0]
x, y, w, h, cls = int(x), int(y), int(w), int(h), int(cls)
# 计算物体的右下角坐标
x2 = x + w
y2 = y + h
# 显示分类、坐标和大小信息
class_names = ['class1', 'class2', 'class3', 'class4', 'class5']
print('Class:', class_names[cls])
print('Position: ({}, {})-({}, {})'.format(x, y, x2, y2))
print('Size: {}x{}'.format(w, h))
# 在图像上绘制矩形框
cv2.rectangle(frame, (x, y), (x2, y2), (0, 255, 0), 2)
# 显示图像
cv2.imshow('frame', frame)
# 按下q键退出
if cv2.waitKey(1) & 0xFF == ord('q'):
break
# 释放摄像头
cap.release()
cv2.destroyAllWindows()
```
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