基于多尺度空洞卷积的对抗去雾网络

Adversarial dehazing network based on multi-scale dilated convolution

  • 摘要: 雾天拍摄的图像存在颜色失真、图像细节模糊的问题,对成像设备采集到的图像质量造成了负面印象。针对雾天搜集图像存在的降质问题,提出了一种基于多尺度空洞卷积的对抗去雾网络。去雾网络的生成器由不同空洞率的卷积模块组成,结合多尺度的策略增加感受野并增强去雾效果;判别器采用多个卷积模块构成,用于区分生成的去雾图像与真实无雾图像;通过计算去雾图像和真实无雾图像之间的感知距离,优化图像的纹理结构并减少噪声信号。实验结果显示,提出算法在公开数据集上获得的峰值信噪比值为22.410 dB,结构相似性值为0.844,色差值为10.545。定量和定性评估表明,采用空洞卷积和感知损失技术设计的去雾网络能够有效地恢复图像的颜色信息和纹理结构。

     

    Abstract: Images taken in hazy days suffer the problems of color distortion and blurred image details, which lead to a negative impact on the image quality captured by imaging equipment. Aiming at solving the degradation problem of image collection in hazy weather, a dehazing network based on multi-scale dilated convolution was proposed. The generator of the dehazing network was composed of convolution modules with different dilated rates, and combined with multi-scale strategies to increase the receptive field and enhanced the dehazing effect; the discriminator used multiple convolution modules to distinguish the generated dehazed images from real haze-free images; by calculating the perception distance between the dehazed images and the real haze-free images, the texture structure of the images was optimized and the noise signal was reduced. The experimental results show that the peak signal-to-noise ratio obtained by the proposed algorithm on the public data set is 22.410 dB, the structural similarity value is 0.844, and the color difference value is 10.545. Quantitative and qualitative evaluations show that the dehazing network designed with dilated convolution and perceptual loss can effectively restore the color information and texture structure of the images.

     

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