METHOD FOR CORRECTING IMAGE FROM WIDE-ANGLE LENS AND DEVICE THEREFOR

摘要

The present invention relates to a method for correcting the distortion of an image due to a wide-angle lens, and a device therefor, wherein the image correction method and the device therefor are capable of quickly correcting the distortion of an image with low resources since the amount of computation is small.

主权项

1. A method for correcting a distortion of an image pickup area due to a wide-angle lens, the method comprising:
setting a horizontal reference line and a vertical reference line both of which cross the center of the image pickup area; setting a part of curve of ellipse which has a part of the horizontal reference line as a major axis and a part of the vertical reference line as a minor axis with respect to the center; converting a y-value of a pixel belonging to the part of the curve of ellipse into a y-value on the minor axis of the ellipse; and storing a correspondence relation between coordinates of the pixel belonging to the part of the curve of ellipse and the converted coordinates as an entry of a distortion correction table.