Lecture 16: Cameras and Lenses (18)
clarkd2017

The image with the widest field of view appears warped. I was wondering, is this a desired characteristic or are there techniques used to remove this distortion?

FLinesse

@clarkd2017 It's a fisheye lens. Quote from Wikipedia: "A fisheye lens is an ultra wide-angle lens that produces strong visual distortion intended to create a wide panoramic or hemispherical image. Fisheye lenses achieve extremely wide angles of view. Instead of producing images with straight lines of perspective (rectilinear images), fisheye lenses use a special mapping (for example: equisolid angle), which gives images a characteristic convex non-rectilinear appearance.

AlexTLuo

What advantages are there to using a fisheye lens to get a wide angle picture compared to how phones take panoramic pictures? I was under the impression that phones stitch together normal images in order to create the wide angle effect.

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