1. An image capturing device comprising: a first imaging camera, which captures a front image showing a subject in a front view; a convex reflector located behind an imaging plane of an optical system formed by the first imaging camera, which shares an optical axis with the first imaging camera and mirrors at least the subject beside the convex reflector as a side image, a convex portion of the convex reflector oriented forward, facing the subject; a second imaging camera, which shares the optical axis between the first imaging camera and the convex reflector and captures the side image mirrored by the convex reflector; and an image processor, which adjusts resolutions of the front image captured by the first imaging camera and the side image captured by the second imaging camera, obtains a mirror-reversed image from either the front image captured by the first imaging camera or from the side image captured by the second imaging camera, and blends the mirror-reversed front image or mirror-reversed side image with the side image or front image, respectively, thus creating a blended image; wherein vertical and horizontal sizes of the image captured by the first imaging camera fits a resolution of the image captured by the second imaging camera.