Method of image fusion on camera device equipped with multiple cameras

A camera device, comprising:

• a first imaging section, configured to capture a first image of a scene with a first field of view (FOV);
• a second imaging section, configured to capture a second image of the scene with a second FOV;
• a third imaging section, configured to capture a third image of the scene with a third FOV;
• and
• a processor, coupled to the first imaging section, the second imaging section, and the third imaging section, and configured to generate a first output image by performing a first image-fusion process on the first image, the second image, and a third image in response to a zooming factor of the camera device being between a first zooming factor and a second zooming factor,
• wherein the first FOV is wider than the second FOV, and the second FOV is wider than the third FOV, and the second zooming factor is greater than the first zooming factor.