Fisheye image correction method and device and computer equipment

Abstract

The invention relates to a fisheye image correction method and device. The fisheye image correction method comprises the steps of acquiring an optical imaging center of an initial fisheye image to becorrected, and converting image coordinates of the initial fisheye image into image physical coordinates; performing correction on the initial fisheye image according to a preset mapping relation to obtain a longitudinal repair image of the initial fisheye image; performing a primary rotation operation on the longitudinal repair image to obtain a rotated image, wherein the rotating angle of the primary rotation operation is odd times of 90 degrees; performing correction of the rotated image according to the mapping relation to obtain a preliminary repair image of the initial fisheye image; andperforming a secondary rotation operation on the preliminary repair image to obtain a target corrected image of the initial fisheye image, wherein the secondary rotation operation and the primary rotation operation are identical in angle and opposite in direction. According to the invention, the reading and writing efficiency of a memory in the image correcting process is improved, and the correcting process is simple and flexible.

Description

technical field

[0001] The invention relates to the technical field of image processing, in particular to a fisheye image correction method, device, storage medium and computer equipment. Background technique

[0002] Fisheye image correction is a common digital image processing technique. The traditional fisheye image correction mainly establishes the fisheye lens imaging model and distortion model, obtains the model parameters through calibration, and establishes the corresponding relationship between the corrected image and the uncorrected image. A corrected image is thus obtained.

[0003] In the existing fisheye image correction process, a row of pixels in the corrected image may correspond to different rows of pixels in the initial fisheye image, such as figure 1 In the physical coordinate system of the image shown, the * point is the pixel point of the initial fisheye image, and the o point is the pixel point after correction. In order to obtain the o-point pixel o...

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