Complex Network for Complex Problems: A comparative study of CNN and Complex-valued CNN

• URL: http://arxiv.org/abs/2302.04584v1
• Date: Thu, 9 Feb 2023 11:51:46 GMT
• Title: Complex Network for Complex Problems: A comparative study of CNN and Complex-valued CNN
• Authors: Soumick Chatterjee, Pavan Tummala, Oliver Speck and Andreas N\"urnberger
• Abstract summary: Complex-valued convolutional neural networks (CV-CNN) can preserve the algebraic structure of complex-valued input data. CV-CNNs have double the number of trainable parameters as real-valued CNNs in terms of the actual number of trainable parameters. This paper presents a comparative study of CNN, CNNx2 (CNN with double the number of trainable parameters as the CNN), and CV-CNN.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Neural networks, especially convolutional neural networks (CNN), are one of the most common tools these days used in computer vision. Most of these networks work with real-valued data using real-valued features. Complex-valued convolutional neural networks (CV-CNN) can preserve the algebraic structure of complex-valued input data and have the potential to learn more complex relationships between the input and the ground-truth. Although some comparisons of CNNs and CV-CNNs for different tasks have been performed in the past, a large-scale investigation comparing different models operating on different tasks has not been conducted. Furthermore, because complex features contain both real and imaginary components, CV-CNNs have double the number of trainable parameters as real-valued CNNs in terms of the actual number of trainable parameters. Whether or not the improvements in performance with CV-CNN observed in the past have been because of the complex features or just because of having double the number of trainable parameters has not yet been explored. This paper presents a comparative study of CNN, CNNx2 (CNN with double the number of trainable parameters as the CNN), and CV-CNN. The experiments were performed using seven models for two different tasks - brain tumour classification and segmentation in brain MRIs. The results have revealed that the CV-CNN models outperformed the CNN and CNNx2 models.

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