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sos about dcls-sr HOT 6 CLOSED

megvii-research avatar megvii-research commented on July 4, 2024
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Algolzw avatar Algolzw commented on July 4, 2024

1、函数get_uperleft_denominator即是论文中的深度约束最小二乘滤波,可以看作对每个特征通道都进行去模糊操作。

2、其中convert_psf2otf表示傅立叶变换,我们在该函数里手动实现了中心化的过程(也就是那些位移操作,移动kernel的4个象限使得低频信息在中心)。

3、inv_fft_kernel_est函数即是对应论文中的公式(16)。复数与其共轭的相乘:zz*=(x+iy)(x-iy)=x^2+y^2

4、deconv就是去卷积操作,即频域的卷积等于空域的乘积。复数乘法:(a+bi)(c+di)=(ac-bd)+(bc+ad)i

整个过程就是把图像和kernel转到频域中,再利用**公式(16)公式(13)**完成特征去卷积运算。在代码中复数x[:, :, :, :, 0]表示实部,x[:, :, :, :, 1]表示虚部。

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fenghao195 avatar fenghao195 commented on July 4, 2024

谢谢您,获益良多

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Algolzw avatar Algolzw commented on July 4, 2024

没事,感谢关注我们的工作。

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15049114601 avatar 15049114601 commented on July 4, 2024

您好,有个疑问,deconv是去卷积操作,但论文里面公式13是在空间域做乘积,没涉及卷积,是我理解错了吗?
image

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Algolzw avatar Algolzw commented on July 4, 2024

您好,有个疑问,deconv是去卷积操作,但论文里面公式13是在空间域做乘积,没涉及卷积,是我理解错了吗? image

你好,公式13其实就是卷积操作,H是去卷积kernel,Gy是模糊特征。 不过这里的具体实现就是在频域里的乘积。

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15049114601 avatar 15049114601 commented on July 4, 2024

您好,有个疑问,deconv是去卷积操作,但论文里面公式13是在空间域做乘积,没涉及卷积,是我理解错了吗? image

你好,公式13其实就是卷积操作,H是去卷积kernel,Gy是模糊特征。 不过这里的具体实现就是在频域里的乘积。

明白了,谢谢您!

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