DIRECTIONALLY ADAPTIVE SUPER-RESOLUTION

2009-11-10
Turgay, Emre
Akar, Gözde
In this paper a novel direction adaptive super-resolution (SR) image reconstruction method is proposed. The proposed maximum a-posteriori (MAP) based estimator uses gradient direction for optimal noise reduction while preserving the edges. Compared to the other edge-preserving methods, the proposed algorithm uses gradient direction in addition to the gradient amplitude for optimum regularization. The method comprises a gradient amplitude and direction estimation stage where a gradient direction map is obtained. This map guides the SR reconstruction stage through iterations. Three variations of the proposed method are compared against other edge-preserving super resolution methods. PSNR (Peak signal-to-noise-ratio), SSIM (Structural similarity index measure) values, and illustrations show that the proposed method has better performance especially on image pixel values where a strong gradient is present.
Citation Formats
E. Turgay and G. Akar, “DIRECTIONALLY ADAPTIVE SUPER-RESOLUTION,” 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47764.