Image distortion correction method and device

Abstract

The embodiment of the invention discloses an image distortion correction method and device, and the method comprises the steps: calculating at least one first distortion coordinate, each first distortion coordinate being a coordinate of a first sequence block in a distorted image, and storing the distorted image in a DDR; loading first image data in the distorted image into a first SRAM (Static Random Access Memory) based on the at least one first distortion coordinate; and carrying out distortion correction processing on the first image data, calculating at least one second distortion coordinate, and loading second image data in the distorted image into a second SRAM (Static Random Access Memory). The image data in the at least one distortion coordinate range is loaded to the SRAM from the DDR at a time, the number of times of interaction with the DDR in the image distortion correction process is reduced, the image data is loaded to the SRAM from the DDR through a ping-pong mechanism for distortion correction, the efficiency of accessing the DDR by an algorithm is improved, and then the correction speed of the image distortion correction algorithm is improved.

Description

technical field [0001] The present application relates to the technical field of image processing, and in particular to an image distortion correction method and device. Background technique [0002] Currently commonly used lenses include ordinary lenses, wide-angle lenses and fisheye lenses. Among them, the angle of view of ordinary lenses is very small, about 30° to 60°, and the angle of view of wide-angle lenses is relatively wide, about 90° to 140°, while fisheye lenses belong to A special lens in the wide-angle lens, its angle of view reaches or exceeds the range that the human eye can see, generally up to 200° to 230°. With the development of science and technology, in military, medical, transportation and explosion-proof fields, people generally use wide-angle lenses to obtain larger and more realistic scene information. A certain degree of distortion occurs. [0003] In the scene where the image captured by the ultra-wide-angle distortion lens is distorted, the ima...

AI Technical Summary

Problems solved by technology

At present, the commonly used method is to output a point every time interpolation. When interpolating a point, the original image data needs to be obtained from the DDR. Therefore, the number of times the output image size determines the number of interactions with the DDR, and frequent interactions with the DDR will be extremely difficult. Large impact algorithm correction speed

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