DaSiamRPN.py

import torch.nn as nn
import torch.nn.functional as F


class DaSiamRPN(nn.Module):
    def __init__(self, size=1, feature_out=256, anchor=5):
        configs = [3, 96, 256, 384, 384, 256]
        configs = list(map(lambda x: 3 if x==3 else x*size, configs))
        feat_in = configs[-1]
        super(DaSiamRPN, self).__init__()
        self.featureExtract = nn.Sequential(
            nn.Conv2d(configs[0], configs[1] , kernel_size=11, stride=2),
            nn.BatchNorm2d(configs[1]),
            nn.MaxPool2d(kernel_size=3, stride=2),
            nn.ReLU(inplace=True),
            nn.Conv2d(configs[1], configs[2], kernel_size=5),
            nn.BatchNorm2d(configs[2]),
            nn.MaxPool2d(kernel_size=3, stride=2),
            nn.ReLU(inplace=True),
            nn.Conv2d(configs[2], configs[3], kernel_size=3),
            nn.BatchNorm2d(configs[3]),
            nn.ReLU(inplace=True),
            nn.Conv2d(configs[3], configs[4], kernel_size=3),
            nn.BatchNorm2d(configs[4]),
            nn.ReLU(inplace=True),
            nn.Conv2d(configs[4], configs[5], kernel_size=3),
            nn.BatchNorm2d(configs[5]),
        )

        self.anchor = anchor
        self.feature_out = feature_out

        self.conv_r1 = nn.Conv2d(feat_in, feature_out*4*anchor, 3)
        self.conv_r2 = nn.Conv2d(feat_in, feature_out, 3)
        self.conv_cls1 = nn.Conv2d(feat_in, feature_out*2*anchor, 3)
        self.conv_cls2 = nn.Conv2d(feat_in, feature_out, 3)
        self.regress_adjust = nn.Conv2d(4*anchor, 4*anchor, 1)

        self.r1_kernel = []
        self.cls1_kernel = []

        self.cfg = {'lr': 0.30, 'window_influence': 0.40, 'penalty_k': 0.22, 'instance_size': 271, 'adaptive': False}


    def forward(self, x):
        x_f = self.featureExtract(x)
        return self.regress_adjust(F.conv2d(self.conv_r2(x_f), self.r1_kernel)), \
               F.conv2d(self.conv_cls2(x_f), self.cls1_kernel)

    def temple(self, z):
        z_f = self.featureExtract(z)
        r1_kernel_raw = self.conv_r1(z_f)
        cls1_kernel_raw = self.conv_cls1(z_f)
        kernel_size = r1_kernel_raw.data.size()[-1]
        self.r1_kernel = r1_kernel_raw.view(self.anchor*4, self.feature_out, kernel_size, kernel_size)
        self.cls1_kernel = cls1_kernel_raw.view(self.anchor*2, self.feature_out, kernel_size, kernel_size)