An obvious question for a beginner in the field of image processing, would be about what the importance of mixing images is. The answer is that the basic idea behind mixing or combining images is to enrich them and achieve the following results:
Enhance the information included in multimodal images, that is, images acquired from different sensors or scanners, to detect regions of interest. This is a technique often used in medical imaging applications, such as brain CT/MRI images or body PET/CT images.
See more than the eye can see, by combining images of the same subject, taken at different frequencies of the electromagnetic spectrum. This is a way to extract information that is not normally visible to humans, such as for example, infrared wavelengths.
Blend two or more images together to end up with an artistic result.
Combine images of the same subject taken using different exposure levels, to end up with a resulting image with a higher dynamic...