inference样例（一）

一、图像分类（resnet18）

1. 简介

说明：使用图像分类经典模型resnet18进行蜜蜂/蚂蚁图像分类。如下图为不同resnet的结构：

推理基本步骤：

1. 获取数据与模型

2. 数据变换，如RGB → 4D-Tensor

3. 前向传播

4. 输出保存预测结果

Inference阶段注意事项：

1. 确保 model处于eval状态而非training

2. 设置torch.no_grad()，减少内存消耗

3. 数据预处理需保持一致，RGB o rBGR？

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输入：任意大小图片（含有蜜蜂或蚂蚁）

输出：图像+描述

2. 样例

ant1

input shape:(800, 534)
time:0.033s

ant2

input shape:(500, 375)
time:0.032s

ant3

input shape:(422, 500)
time:0.038s

ant4

input shape:(2592, 1944)
time:0.050s

ant5

input shape:(500, 375)
time:0.032s

bee1

input shape:(500, 477)
time:0.029s

bee2

input shape:(399, 300)
time:0.063s

bee3

input shape:(366, 500)
time:0.036s

bee4

input shape:(348, 500)
time:0.034s

bee5

input shape:(500, 375)
time:0.036s

二、人脸图像生成（dcgan）

1. 简介

网络结构：生成器（由100维随机向量生成64*64*3图片）如图所，判别器则相反（由图片卷积到单一输出，表示real/fake），详见DCGAN结构解读

数据项目：http://mmlab.ie.cuhk.edu.hk/projects/CelebA.html

输入：

• num_img = 16 # 生成图片数量
• nrow = 4 # 每行展示数量
• noise_continue = False # 随机噪声是否连续：当取True时，在两个随机向量中产生等间距分布的num_img-2个向量，生成连续变化的照片

输出：通过网格图生成num_img个图像，每张图大小均为64*64 + 运行时间

2. 生成样例：

样例1

num_img = 16
nrow = 4
noise_continue = False

time: 0.430

样例2

num_img = 16
nrow = 4
noise_continue = True

time: 0.388

样例3

num_img = 64
nrow = 8
noise_continue = False

time: 0.430

样例4

num_img = 64
nrow = 8
noise_continue = True

time: 0.430

三、目标探测（faster_rcnn）

1. 简介

问题描述：判断图像中目标的位置

目标检测两要素

1. 分类：分类向量[p0, …, pn]

2. 回归：回归边界框[x1, y1, x2, y2]

网络结构：详见Faster RCNN

Faster RCNN 数据流：

1. Feature map： [256, h_f, w_f]

2. 2 Softmax：[num_anchors, h_f, w_f]

3. Regressors：[num_anchors*4, h_f, w_f]

4. NMS OUT: [n_proposals=2000, 4]

5. ROI Layer: [512, 256, 7, 7]

6. FC1 FC2: [512, 1024]

7. c+1 Softmax: [512, c+1]

8. Regressors: [512, (c+1)*4]

目标检测推荐github： https://github.com/amusi/awesome-object-detection

输入：任意大小图片

输出：探测图 + 描述

2. 样例

样例1

input img tensor shape:torch.Size([3, 624, 1270])
time: 3.468s
labels: ['person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'handbag', 'person', 'person', 'person', 'person', 'person', 'handbag', 'backpack', 'person', 'person', 'person', 'backpack', 'backpack', 'handbag', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'handbag', 'person', 'person', 'handbag', 'person', 'person', 'person', 'person', 'person', 'handbag', 'person', 'handbag', 'person', 'person', 'person', 'person', 'person', 'handbag', 'person', 'person', 'person', 'backpack', 'person', 'person', 'handbag', 'person', 'person', 'person', 'person', 'backpack', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'handbag', 'person', 'person', 'person', 'person', 'handbag', 'person']
scores: [0.9861, 0.985, 0.978, 0.9777, 0.977, 0.9735, 0.9488, 0.9457, 0.9451, 0.9073, 0.8724, 0.8721, 0.8539, 0.8525, 0.8394, 0.8078, 0.7983, 0.7772, 0.7599, 0.7478, 0.7289, 0.7089, 0.6798, 0.6635, 0.6635, 0.6547, 0.6513, 0.6507, 0.6486, 0.638, 0.6087, 0.6002, 0.5873, 0.5866, 0.5681, 0.5653, 0.5568, 0.5563, 0.5497, 0.5367, 0.527, 0.5192, 0.5159, 0.4952, 0.4536, 0.4505, 0.4493, 0.4458, 0.4407, 0.4389, 0.4288, 0.4184, 0.4058, 0.3983, 0.3913, 0.3878, 0.3873, 0.3766, 0.3633, 0.3479, 0.347, 0.345, 0.3419, 0.3407, 0.3377, 0.3356, 0.3273, 0.3202, 0.3139, 0.3098, 0.2969, 0.2954, 0.2953, 0.2906, 0.281, 0.2802, 0.28, 0.2781, 0.2758, 0.2721, 0.2699, 0.2681, 0.2658, 0.2643, 0.2599, 0.2526, 0.2497, 0.2455, 0.237, 0.236, 0.2311, 0.2309, 0.2292, 0.2239, 0.221, 0.2201, 0.2136, 0.211, 0.2063, 0.1997]

样例2

input img tensor shape:torch.Size([3, 433, 649])
time: 3.446s
labels: ['person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'frisbee', 'backpack', 'person', 'frisbee', 'handbag', 'person', 'person', 'person', 'person', 'person', 'person', 'person', 'backpack', 'person', 'backpack', 'baseball glove', 'person', 'handbag', 'cell phone', 'person', 'baseball glove', 'handbag', 'person', 'skateboard', 'person', 'handbag', 'person', 'bench', 'tie', 'person', 'person', 'person', 'baseball glove', 'baseball glove', 'person', 'person', 'person', 'person', 'car', 'person', 'baseball glove', 'person', 'baseball glove']
scores: [0.9989, 0.9984, 0.998, 0.998, 0.9958, 0.9945, 0.9927, 0.987, 0.9841, 0.977, 0.9709, 0.9694, 0.9575, 0.95, 0.9377, 0.916, 0.9138, 0.8392, 0.7031, 0.6829, 0.6816, 0.4896, 0.4661, 0.4086, 0.3937, 0.3934, 0.3471, 0.2957, 0.2796, 0.2519, 0.2344, 0.2308, 0.1834, 0.1582, 0.1572, 0.1476, 0.1428, 0.1385, 0.1196, 0.118, 0.1108, 0.1054, 0.1012, 0.0976, 0.0959, 0.0937, 0.0873, 0.0868, 0.0854, 0.0828, 0.0781, 0.0731, 0.0726, 0.0721, 0.0701, 0.0691, 0.0663, 0.0632, 0.0616, 0.0612, 0.0592, 0.0589, 0.057, 0.0559, 0.0552, 0.0551, 0.0531, 0.0516, 0.0511]

样例3

input img tensor shape:torch.Size([3, 404, 435])
time: 2.437s
labels: ['person', 'person', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'person', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'person', 'handbag', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'person', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'motorcycle', 'bicycle', 'bicycle', 'backpack', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'car', 'person', 'bicycle', 'skateboard', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'stop sign', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle', 'bicycle']
scores: [0.9997, 0.9995, 0.9962, 0.9865, 0.976, 0.9674, 0.9191, 0.8953, 0.8745, 0.8735, 0.8365, 0.8203, 0.8016, 0.7921, 0.7511, 0.7246, 0.7214, 0.6532, 0.6327, 0.616, 0.6086, 0.5796, 0.5732, 0.5494, 0.534, 0.532, 0.5016, 0.4768, 0.451, 0.4438, 0.4215, 0.3844, 0.3572, 0.3446, 0.3433, 0.3162, 0.3137, 0.2468, 0.241, 0.2177, 0.1947, 0.1934, 0.1751, 0.1486, 0.1417, 0.1263, 0.1187, 0.1187, 0.1149, 0.1145, 0.1071, 0.1051, 0.0987, 0.0983, 0.0895, 0.0845, 0.0837, 0.081, 0.0783, 0.0767, 0.0707, 0.0703, 0.0697, 0.0605, 0.0574, 0.0573, 0.0536]

样例4

input img tensor shape:torch.Size([3, 438, 567])
time: 3.521s
labels: ['person', 'person', 'person', 'person', 'person', 'bicycle', 'backpack', 'person', 'bicycle', 'backpack', 'person', 'person', 'person', 'person', 'backpack', 'backpack', 'bicycle', 'handbag', 'person', 'person', 'bicycle', 'person', 'person', 'person', 'handbag', 'bicycle', 'person', 'tennis racket', 'backpack', 'backpack', 'person', 'bicycle', 'person', 'handbag', 'handbag', 'person', 'potted plant', 'handbag', 'person', 'handbag', 'person', 'person', 'person', 'person', 'chair', 'bicycle', 'person', 'person', 'person', 'bicycle', 'person', 'potted plant', 'person', 'backpack', 'person', 'motorcycle', 'person', 'handbag', 'bicycle', 'handbag', 'person', 'backpack', 'handbag', 'bicycle', 'backpack', 'tie', 'backpack', 'person', 'bicycle', 'person', 'backpack', 'bicycle', 'person', 'motorcycle']
scores: [0.9992, 0.9977, 0.9966, 0.9948, 0.9912, 0.9906, 0.9861, 0.9855, 0.9731, 0.9693, 0.9678, 0.9662, 0.959, 0.9394, 0.936, 0.8802, 0.8656, 0.8219, 0.819, 0.7878, 0.7354, 0.6874, 0.6777, 0.6356, 0.4796, 0.4632, 0.4269, 0.4146, 0.326, 0.2994, 0.2711, 0.2325, 0.2219, 0.2054, 0.1846, 0.184, 0.1698, 0.1687, 0.1613, 0.1577, 0.1575, 0.1533, 0.1526, 0.1486, 0.1432, 0.1426, 0.1304, 0.1222, 0.1209, 0.1139, 0.1126, 0.1122, 0.1026, 0.0974, 0.097, 0.091, 0.0883, 0.0853, 0.0791, 0.0781, 0.0754, 0.0664, 0.0656, 0.0647, 0.0631, 0.0625, 0.0602, 0.0578, 0.0562, 0.053, 0.0513, 0.051, 0.0505, 0.0504]

样例5

input img tensor shape:torch.Size([3, 399, 683])
time: 4.199s
labels: ['person', 'person', 'person', 'person', 'person', 'handbag', 'potted plant', 'potted plant', 'person', 'potted plant', 'person', 'person', 'handbag', 'backpack', 'person', 'handbag', 'person', 'handbag', 'handbag', 'person', 'person', 'potted plant', 'handbag', 'backpack', 'person', 'backpack', 'potted plant', 'person', 'person', 'person', 'tie', 'person', 'handbag', 'backpack', 'potted plant', 'handbag', 'handbag', 'potted plant', 'person', 'potted plant', 'backpack', 'bicycle', 'handbag', 'potted plant', 'chair', 'potted plant', 'potted plant', 'potted plant', 'potted plant', 'handbag', 'backpack', 'tie', 'person', 'backpack', 'potted plant', 'dining table', 'potted plant', 'bench', 'handbag', 'tie', 'potted plant', 'handbag', 'backpack', 'potted plant', 'backpack', 'potted plant', 'backpack', 'potted plant']
scores: [0.9997, 0.9991, 0.9985, 0.9807, 0.9731, 0.9043, 0.8989, 0.8985, 0.8772, 0.6565, 0.5354, 0.5205, 0.4876, 0.4571, 0.421, 0.4015, 0.3939, 0.3668, 0.3612, 0.3448, 0.3254, 0.3165, 0.29, 0.2851, 0.2605, 0.2525, 0.2439, 0.2414, 0.2204, 0.2136, 0.1969, 0.196, 0.1757, 0.1695, 0.1635, 0.1608, 0.1571, 0.1536, 0.15, 0.145, 0.1413, 0.1404, 0.1312, 0.1172, 0.1164, 0.1025, 0.1023, 0.0899, 0.0888, 0.0879, 0.087, 0.0822, 0.081, 0.0757, 0.0748, 0.0738, 0.0729, 0.0709, 0.0707, 0.0681, 0.0663, 0.0648, 0.0627, 0.0588, 0.0567, 0.0531, 0.0525, 0.052]

四、人像分离（unet）

1. 简介

问题描述：将人物与背景相分离，逐像素的二分类问题

网络结构：详见u-net

输入：任意大小图片

输出：分割图 + 时间

2. 样例

样例1

time: 0.735s 

样例2

time: 0.415s 

样例3

time: 0.471s 

五、语义分割（resnet101）

1. 简介

问题：将图像中每个像素分类为21类（'__background__', 'aeroplane', 'bicycle', 'bird', 'boat', 'bottle', 'bus', 'car', 'cat', 'chair', 'cow', 'diningtable', 'dog', 'horse', 'motorbike', 'person', 'pottedplant', 'sheep', 'sofa', 'train', 'tvmonitor'）的一种

特点：逐像素分类，无法区分个体

模型如何完成图像分割？图像分割由模型（将数据映射到特征）与人类（定义特征的物理意义，解决实际问题）配合完成

输入：一张任意大小的图片

输出：语义分割图 + 描述

网络结构：详见deeplabv3，网络结构图如下

2. 样例

样例1

input img tensor shape:torch.Size([1, 3, 433, 649])
output img tensor shape:torch.Size([21, 433, 649])
time: 4.205s

demo_img2.png

input img tensor shape:torch.Size([1, 3, 433, 649])
output img tensor shape:torch.Size([21, 433, 649])
time: 4.534s

demo_img3.png

input img tensor shape:torch.Size([1, 3, 730, 574])
output img tensor shape:torch.Size([21, 730, 574])
time: 6.472s