Image fusion method and device for multi-camera module, storage medium and mobile terminal

Abstract

The invention discloses an image fusion method and device for a multi-camera module, a storage medium and a mobile terminal, the multi-camera module comprises a first camera and a second camera, the method comprises the steps of: obtaining a first image and a second image, wherein the first image is obtained through the first camera, and the second image is acquired by the second camera; roughly aligning the first image to a second image based on perspective transformation; calculating an alignment error of the second image relative to the first image after coarse alignment; determining an alignment correction amount of each pixel in the first image according to the alignment error and correcting the alignment correction amount to obtain a first image after fine alignment of the second image, and recording the first image as a processed first image; and fusing the processed first image into the second image to obtain a fused image. Through the scheme of the invention, the imaging quality of the multi-camera module after view field fusion can be greatly improved, and the calculation complexity is low.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to an image fusion method and device, a storage medium, and a mobile terminal for a multi-camera module. Background technique [0002] With the development of smart phones, the camera function plays an increasingly important role in the smart phone. In order to obtain a better camera experience, the number of cameras equipped on smartphones is also increasing, such as gradually evolving from the initial single camera to dual cameras, triple cameras and even more. The increasing number of cameras has resulted in an ever-increasing image quality of images captured by smartphones. [0003] Take the currently more common wide-angle and telephoto dual-camera mobile phones as an example. The imaging of this type of dual-camera mobile phone is realized by the wide-angle and telephoto lenses respectively. That is to say, at the wide-angle lens imaging focal length, the im...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of the lens itself, there will be significant differences in the color, brightness, and clarity of images captured by lenses with different focal lengths.

During the zooming process of a multi-camera mobile phone, if no processing is done, the switching of lenses with different focal lengths will bring discomfort to the user, which is not as smooth and natural as optical zooming

[0005] On the other hand, although the image quality of images taken by multi-camera mobile phones has improved compared with that of early single-camera mobile phones, in a single lens focal length (excluding the focal length corresponding to the lens with the longest focal length), when the zoom ratio is large, Digital zoom still plays an important role, and the image quality of images taken by multi-camera phones will still suffer at this time

[0006] Field of view fusion can improve the above two problems, but the existing field of view fusion schemes generally have defects, resulting in poor image quality

On the other hand, when smartphones implement the existing field of view fusion scheme, the computational complexity is high, which seriously affects the power consumption of the device

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