Give an overview of various image fusion techniques.

Image fusion is the process of combining information from multiple images of the same scene to create a single composite image that contains complementary or enhanced information. This process aims to improve the quality, clarity, and interpretability of the resulting image for various applications, including remote sensing, medical imaging, surveillance, and multimedia. Various image fusion techniques have been developed to achieve different objectives and accommodate different types of input data. Here is an overview of some common image fusion techniques:

1. Pixel-Level Fusion:

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