Semantic-Driven Global-Local Fusion Transformer for Image Super-Resolution.

Image Super-Resolution (SR) has seen remarkable progress with the emergence of transformer-based architectures. However, due to the high computational cost, many existing transformer-based SR methods limit their attention to local windows, which hinders their ability to model long-range dependencies and global structures. To address these challenges, we propose a novel SR framework named Semantic-Driven Global-Local Fusion Transformer (SGLFT). The proposed model enhances the receptive field by combining a Hybrid Window Transformer (HWT) and a Scalable Transformer Module (STM) to jointly capture local textures and global context. To further strengthen the semantic consistency of reconstruction, we introduce a Semantic Extraction Module (SEM) that distills high-level semantic priors from the input. These semantic cues are adaptively integrated with visual features through an Adaptive Feature Fusion Semantic Integration Module (AFFSIM). Extensive experiments on standard benchmarks demonstrate the effectiveness of SGLFT in producing visually faithful and structurally consistent SR results. The code will be available at https://github.com/kbzhang0505/SGLFT.