Method and device for generating panoramic image with high dynamic range

Abstract

The invention discloses a method for generating a panoramic image in a high dynamic range. The method comprises the following steps: S1, acquiring multi-exposure sequence images in different shootingdirections; s2, respectively splicing the image groups which are different in shooting direction and have the same exposure parameter to obtain a multi-exposure panoramic image sequence; s3, calculating a synthesis weight according to the exposure quality degree of each pixel point of the multi-exposure panoramic image sequence to obtain a multi-exposure weight sequence; s4, projecting the multi-exposure panoramic image sequence and the multi-exposure weight sequence to a spherical coordinate system; s5, calculating a Laplace pyramid of the multi-exposure spherical panoramic image sequence; s6, calculating a Gaussian pyramid of the multi-exposure spherical weight sequence; and S7, synthesizing the panoramic image Laplace pyramid and the weight Gaussian pyramid, and reconstructing to obtaina panoramic image with a high dynamic range. The panoramic image with the high dynamic range generated by the invention can record details of a bright part and a dark part at the same time, 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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