Robust image fusion with block sparse representation and online dictionary learning

For many image fusion problems, the most used technique is selecting features with rich information. The robust image fusion method based on block compressive sensing principle is studied here. Compressive sensing is known to provide an effective method with high accuracy. The framework of the proposed method is given in various perspectives: block sparse representations, restoration algorithms, feature extraction, online dictionary learning, and fusion rules. In terms of restoration of fused images, the split Bregman iteration is adopted. The proposed method can acquire well fusion image from source images and remove some degradations simultaneously, such as noises and blurring effect. In addition, both maximum selection' and weighted mean' are investigated as fusion rules, which can preserve more information. Generally, the proposed method can achieve better fusion result from the source images. The experiments with or without noise source images both illustrate that the proposed method has relatively comparative fusion results.