The adversarial feature enhancement module can be further improved by incorporating other frequency-domain techniques beyond high-pass filtering. One potential enhancement could involve the use of wavelet transforms to analyze the frequency components of the adversarial examples. Wavelet transforms can provide a multi-resolution analysis of the input data, allowing for a more detailed examination of the frequency characteristics that may be crucial for detecting adversarial perturbations. By integrating wavelet transforms or other advanced frequency-domain techniques, the feature enhancement module can capture a broader range of frequency information and enhance the model's ability to detect subtle adversarial manipulations.