A high dynamic range panoramic image generation method and its generation device

Abstract

The invention discloses a method for generating a high dynamic range panoramic image, comprising the following steps: S1, acquiring multi-exposure sequence images in different shooting directions; S2, splicing image groups in different shooting directions and having the same exposure parameters respectively, to obtain Multi-exposure panoramic image sequence; S3, calculate composite weight according to the degree of exposure of each pixel in the multi-exposure panoramic image sequence, and obtain the multi-exposure weight sequence; S4, project the multi-exposure panoramic image sequence and the multi-exposure weight sequence to the spherical coordinate system; S5, calculate the Laplacian pyramid of the multi-exposure spherical panoramic image sequence; S6, calculate the Gaussian pyramid of the multi-exposure spherical weight sequence; S7, carry out the panoramic image Laplacian pyramid and the weight Gaussian pyramid Synthesis, reconstruction to obtain panoramic images with high dynamic range. The high dynamic range panorama image generated by the invention can simultaneously record the details of the bright part and the dark part, and the image quality is high.

Description

technical field [0001] The invention belongs to the technical field of panoramic image synthesis, and in particular relates to the synthesis of high dynamic range panoramic images. Background technique [0002] High-Dynamic Range images (High-Dynamic Range, referred to as HDR), compared with ordinary images, can provide more dynamic range and image details, according to different exposure time LDR (Low-Dynamic Range) Time corresponds to the LDR image with the best details to synthesize the final HDR image, which can better reflect the visual effect of people in the real environment. High dynamic range images can record details of bright and dark parts at the same time, while general image sensors can only use 8 bits to represent images due to the limitation of tolerance, that is, light of different brightness enters the sensor, and finally can only be mapped to 0- 255 range, resulting in loss of detail in highlights or shadows. [0003] For a panoramic image, if the field ...

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The purpose of the present invention is to address the deficiencies in the prior art and provide a high dynamic range panoramic image generation method to solve the problem of low dynamic range inevitably caused by the limited tolerance of the image sensor and the large field of view of the panoramic image. Better record the details of bright and dark parts, improve image quality;

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