Mapping New Realities: Ground Truth Image Creation with Pix2Pix Image-to-Image Translation

Mapping New Realities: Ground Truth Image Creation with Pix2Pix Image-to-Image Translation

1 May 2024 | Zhenglin Li, Bo Guan, Yiming Zhou, Yuanzhou Wei, Jingyu Zhang, Jinxin Xu
This paper presents a novel application of the Pix2Pix image-to-image translation framework to generate realistic ground truth images from abstract map images. The proposed method addresses the challenge of scarce high-fidelity ground truth images required for applications such as urban planning and autonomous vehicle training. The Pix2Pix model is used to generate high-fidelity datasets, supported by a dataset of paired map and aerial images, and enhanced by a tailored training regimen. The results demonstrate the model's capability to accurately render complex urban features, establishing its efficacy and potential for broad real-world applications. The Pix2Pix framework consists of a generator and a discriminator. The generator, based on a U-Net-like architecture, transforms input images into output images, while the discriminator tries to distinguish between real and generated images. The generator uses convolutional layers with skip connections to preserve spatial information, and the discriminator is a PatchGAN classifier that evaluates the verisimilitude of the output against the actual ground truth. The model was trained on a dataset comprising various urban and rural landscapes to ensure robustness and generality in the translation capability. The training process involves alternating updates between the generator and discriminator using TensorFlow's gradient computation and application functionalities. The Adam optimizer was used with a learning rate of 2e-4 and a momentum parameter of 0.5 to facilitate stable training and convergence. The results show that the model can generate coherent and contextually accurate urban imagery. However, the model exhibited limitations in certain scenarios, such as regions with homogeneous textures or repetitive patterns, which occasionally resulted in artifacts in the generated images. Future work may explore the integration of more sophisticated loss functions and training strategies to enhance the model's performance and reduce the incidence of translation artifacts. Additionally, exploring advanced loss functions, adaptive learning rate schedules, transfer learning, and transformer-based models could improve the model's ability to generalize across different contexts. The study concludes that the Pix2Pix model has significant potential as a transformative tool for image-to-image translation tasks, opening avenues for its application in diverse fields that rely on accurate and detailed visual data representations.This paper presents a novel application of the Pix2Pix image-to-image translation framework to generate realistic ground truth images from abstract map images. The proposed method addresses the challenge of scarce high-fidelity ground truth images required for applications such as urban planning and autonomous vehicle training. The Pix2Pix model is used to generate high-fidelity datasets, supported by a dataset of paired map and aerial images, and enhanced by a tailored training regimen. The results demonstrate the model's capability to accurately render complex urban features, establishing its efficacy and potential for broad real-world applications. The Pix2Pix framework consists of a generator and a discriminator. The generator, based on a U-Net-like architecture, transforms input images into output images, while the discriminator tries to distinguish between real and generated images. The generator uses convolutional layers with skip connections to preserve spatial information, and the discriminator is a PatchGAN classifier that evaluates the verisimilitude of the output against the actual ground truth. The model was trained on a dataset comprising various urban and rural landscapes to ensure robustness and generality in the translation capability. The training process involves alternating updates between the generator and discriminator using TensorFlow's gradient computation and application functionalities. The Adam optimizer was used with a learning rate of 2e-4 and a momentum parameter of 0.5 to facilitate stable training and convergence. The results show that the model can generate coherent and contextually accurate urban imagery. However, the model exhibited limitations in certain scenarios, such as regions with homogeneous textures or repetitive patterns, which occasionally resulted in artifacts in the generated images. Future work may explore the integration of more sophisticated loss functions and training strategies to enhance the model's performance and reduce the incidence of translation artifacts. Additionally, exploring advanced loss functions, adaptive learning rate schedules, transfer learning, and transformer-based models could improve the model's ability to generalize across different contexts. The study concludes that the Pix2Pix model has significant potential as a transformative tool for image-to-image translation tasks, opening avenues for its application in diverse fields that rely on accurate and detailed visual data representations.
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