Distortion correction circuit for generating distortion-corrected image using data for uncorrected image

摘要

A circuit for correcting distortion produced by the lens of a digital camera when generating an image, which includes pixels. The correction circuit includes an address generation circuit for generating horizontal and vertical addresses for each pixel. A coefficient storage circuit stores a pitch correction coefficient associated with the horizontal or vertical address of each pixel. A storage circuit stores data for an image for which distortion is uncorrected in association with an address of the uncorrected image. A calculation circuit calculates the address of data of the uncorrected image corresponding to each pixel using the associated horizontal and vertical addresses and pitch correction coefficient of the horizontal or vertical address. A processing circuit reads the data of the uncorrected image from the storage circuit and generates data for a distortion-corrected image.