Abstract
Panoramic Annular Lens (PAL) is a new type of optical imaging system, achieving one-time image formation without scanning. It has more incomparable advantages than the traditional panoramic imaging optical system in large field of view. However, since PAL is based on the principle of Flat Cylinder Perspective (FCP) , so the cylinder image of PAL has inevitably distortion in both tangential and radial image. This article has a profound study on the image formation principle of the PAL system, and unwraps it in tangential image. Because PAL is based on the principle of \( f - \theta \) optical lens, there exists the compression in the radial image. This article adopts the least squares estimate algorithm to make revision, and the results of experiments showed that the effect was satisfactory.
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