整体代码如下：

    def forward(self, x):
        x = self.conv1(x)
        x1 = x
        out_img3 = x1.squeeze()
        print(out_img3.shape)
        print("经过第一个卷积之后的输出：",x.shape)

import yaml
from omegaconf import OmegaConf
from pathlib import Path
from PIL import Image
import torchvision.transforms as transforms
import matplotlib.pyplot as plt
# 加载图像
img_path = "E:/fasterrcnn/input_images/cat_dog.png"
image = Image.open(img_path)
transform = transforms.ToTensor()
tensor_image = transform(image)
transform_size = transforms.Resize((512,512))
out = transform_size(tensor_image)
tensor_image_batch = out.unsqueeze(0)

yaml_file_path = 'F:/code/DEKR-main/experiments/coco/w32/w32_4x_reg03_bs10_512_adam_lr1e-3_coco_x140.yaml'
yaml_file = Path(yaml_file_path)
if yaml_file.exists():
    with yaml_file.open('r') as file:
        cfg_dict = yaml.safe_load(file)
        cfg = OmegaConf.create(cfg_dict)
    out_img3 = PoseHigherResolutionNet(cfg)
    input = torch.randn(1, 3, 512, 512)
    out_img3 = out_img3.forward(tensor_image_batch)
    # 选择要可视化的通道索引
    selected_channels = [0, 15, 30, 45, 63]  # 例如，选择第0、15、30、45和63个通道

    # 创建一个包含多个子图的图形
    fig, axes = plt.subplots(1, len(selected_channels), figsize=(15, 5))

    # 遍历选定的通道并绘制它们
    for i, ax in enumerate(axes):
        channel_image = out_img3[selected_channels[i]]  # 提取选定通道的图像
        print(channel_image.shape)
        out_img1 = transforms.ToPILImage()(channel_image)
        ax.imshow(out_img1, cmap='viridis')  # 使用 viridis 颜色图显示图像
        ax.set_title(f'Channel {selected_channels[i]}')  # 设置子图的标题
        ax.axis('off')  # 关闭坐标轴

    # 显示图形
    plt.tight_layout()  # 调整子图参数, 使之填充整个图像区域
    plt.show()
    # print(pose.forward(input))

else:
    print(f"Error: The YAML file {yaml_file_path} does not exist.")

首先加载图像

img_path = "E:/fasterrcnn/input_images/cat_dog.png"
image = Image.open(img_path)

然后将图像转换为tensor，也就是数组的形式

transform = transforms.ToTensor()
tensor_image = transform(image)

之后resize大小为（3，512，512）的形式

transform_size = transforms.Resize((512,512))
out = transform_size(tensor_image)

到了这里还不能作为模型的输入，模型的输入是四维的（batch_size,input_channel,width,height）

所以要加一个维度

tensor_image_batch = out.unsqueeze(0)

调用模型

out_img3 = PoseHigherResolutionNet(cfg)
    input = torch.randn(1, 3, 512, 512)
    out_img3 = out_img3.forward(tensor_image_batch)

我们取前向传播的第一个卷积输出，输出的大小为（1，64，112，112），将输出x定义为x1，并用squeeze将其batch_size去掉变成（64，112，112）

    def forward(self, x):
        x = self.conv1(x)
        x1 = x
        out_img3 = x1.squeeze()
        print(out_img3.shape)

 选择可视化的对应通道

# 选择要可视化的通道索引
    selected_channels = [0, 15, 30, 45, 63]  # 例如，选择第0、15、30、45和63个通道

创建一个包含多个通道子图的图形

# 创建一个包含多个子图的图形
    fig, axes = plt.subplots(1, len(selected_channels), figsize=(15, 5))

之后遍历通道并显示出来

# 遍历选定的通道并绘制它们
    for i, ax in enumerate(axes):
        channel_image = out_img3[selected_channels[i]]  # 提取选定通道的图像
        print(channel_image.shape)
        out_img1 = transforms.ToPILImage()(channel_image)
        ax.imshow(out_img1, cmap='viridis')  # 使用 viridis 颜色图显示图像
        ax.set_title(f'Channel {selected_channels[i]}')  # 设置子图的标题
        ax.axis('off')  # 关闭坐标轴

显示

# 显示图形
    plt.tight_layout()  # 调整子图参数, 使之填充整个图像区域
    plt.show()

让其封装到一些函数，方便调用

def figure_trans():
    # 加载图像并转换为数组的形式，调整大小
    img_path = "E:/fasterrcnn/input_images/cat_dog.png"
    image = Image.open(img_path)
    transform = transforms.ToTensor()
    tensor_image = transform(image)

    transform_size = transforms.Resize((512, 512))
    out = transform_size(tensor_image)
    tensor_image_batch = out.unsqueeze(0)

    return tensor_image_batch

def yml_plot():
    yaml_file_path = 'F:/code/DEKR-main/experiments/coco/w32/w32_4x_reg03_bs10_512_adam_lr1e-3_coco_x140.yaml'
    yaml_file = Path(yaml_file_path)
    tensor_image_batch = figure_trans()

    if yaml_file.exists():
        with yaml_file.open('r') as file:
            cfg_dict = yaml.safe_load(file)
            cfg = OmegaConf.create(cfg_dict)
        out_img3 = PoseHigherResolutionNet(cfg)
        # input = torch.randn(1, 3, 512, 512)
        out_img3 = out_img3.forward(tensor_image_batch)
        # 选择要可视化的通道索引
        selected_channels = [0, 15, 30, 45, 63]  # 例如，选择第0、15、30、45和63个通道

        # 创建一个包含多个子图的图形
        fig, axes = plt.subplots(1, len(selected_channels), figsize=(15, 5))

        # 遍历选定的通道并绘制它们
        for i, ax in enumerate(axes):
            channel_image = out_img3[selected_channels[i]]  # 提取选定通道的图像
            print(channel_image.shape)
            out_img1 = transforms.ToPILImage()(channel_image)
            ax.imshow(out_img1, cmap='viridis')  # 使用 viridis 颜色图显示图像
            ax.set_title(f'Channel {selected_channels[i]}')  # 设置子图的标题
            ax.axis('off')  # 关闭坐标轴

        # 显示图形
        plt.tight_layout()  # 调整子图参数, 使之填充整个图像区域
        plt.show()
        # print(pose.forward(input))

    else:
        print(f"Error: The YAML file {yaml_file_path} does not exist.")

plt_figure = yml_plot()