A Multi-focus Image Fusion Method Based on Image Blocks

摘要

This paper presents a method for fusing multi-focus images directly based on analyzing image blocks. Firstly, we separate the clear domains and fuzzy domains by setting a threshold value for the average gradients difference of image blocks corresponding. In clear domains, all the pixels are selected directly as the corresponding pixels in the fused image instead of any kind of transform. However, in processing fuzzy domains, we use a fusion method based on the mean gradients of image blocks. The experimental results show that our method is effective and obviously superior to the multi-scale decomposition-based methods such as wavelet transform and wavelet packet transform.