模块出处

[ECCV 24] [link] [code] Context-Guided Spatial Feature Reconstruction for Efficient Semantic Segmentation

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模块名称

Rectangular self-Calibration Attention (RCA)

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模块作用

空间注意力

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模块结构

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模块代码

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

class RCA(nn.Module):

    def __init__(self, inp, kernel_size=1, ratio=1, band_kernel_size=11, dw_size=(1,1), padding=(0,0), stride=1, square_kernel_size=3, relu=True):
        super(RCA, self).__init__()
        self.dwconv_hw = nn.Conv2d(inp, inp, square_kernel_size, padding=square_kernel_size//2, groups=inp)
        self.pool_h = nn.AdaptiveAvgPool2d((None, 1))
        self.pool_w = nn.AdaptiveAvgPool2d((1, None))
        gc = inp // ratio
        self.excite = nn.Sequential(
                nn.Conv2d(inp, gc, kernel_size=(1, band_kernel_size), padding=(0, band_kernel_size//2), groups=gc),
                nn.BatchNorm2d(gc),
                nn.ReLU(inplace=True),
                nn.Conv2d(gc, inp, kernel_size=(band_kernel_size, 1), padding=(band_kernel_size//2, 0), groups=gc),
                nn.Sigmoid()
            )

    def sge(self, x):
        x_h = self.pool_h(x)
        x_w = self.pool_w(x)
        x_gather = x_h + x_w
        ge = self.excite(x_gather)
        return ge

    def forward(self, x):
        loc = self.dwconv_hw(x)
        att = self.sge(x)
        out = att*loc
        return out

if __name__ == '__main__':
    x = torch.randn([3, 256, 40, 40])
    rca = RCA(inp=256)
    out = rca(x)
    print(out.shape)  # 3, 256, 40, 40

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原文表述

矩形自我校准注意力（RCA）明确地模拟矩形区域并校准注意力形状。

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消融实验