The region-adaptive restoration guidance approach in DiffBIR may have limitations in scenarios where the image content is complex and contains a mix of high-frequency and low-frequency regions. In such cases, the guidance scale may need to be finely tuned to balance between maintaining fidelity in low-frequency regions and preserving details in high-frequency regions. Additionally, the effectiveness of the guidance approach may be impacted by the quality of the high-fidelity guidance image used for comparison. To improve this approach, one potential enhancement could be the integration of a dynamic guidance scale adjustment mechanism that automatically adapts to the content of the image being restored. This dynamic adjustment could be based on the analysis of gradient magnitudes or other image features to optimize the restoration guidance for each specific image.