1. An image conversion apparatus comprising: an image zoom processor that receives a rectangular panoramic image captured in a single image capture operation, and generates a non-rectangular processed panoramic image by processing the rectangular panoramic image, wherein the image zoom processor enlarges a first area of the rectangular panoramic image, of which a position is determined according to a user input, such that a magnification of the enlarged first area gradually varies, and reduces a second area of the rectangular panoramic image, of which a position is determined according to a user input, such that a magnification of the reduced second area gradually varies, to generate the non-rectangular processed panoramic image, wherein a width of the non-rectangular processed panoramic image, which has been enlarged and reduced by the image zoom processor, corresponds to a width of the rectangular panoramic image, in a longitudinal direction, and wherein the magnification of the enlarged first area decreases from a first position to a second position, and the magnification of the reduced second area decreases from the second position to a third position, the first position being a position having a maximum magnification in the enlarged first area, the second position being a position where the enlarged first area meets the reduced second area, and the third position being a position having a minimum magnification in the reduced second area.