Digital zoom method of bifocal camera based on frequency band restoration and super-resolution

Abstract

The invention discloses a digital zooming method of a bifocal camera based on frequency band restoration and super-resolution, which comprises the following steps: using an image obtained by a low-resolution camera, and using a single-frame image super-resolution algorithm to reconstruct different frequency band components to obtain a picture with a high-resolution image The super-resolution image obtained by the resolution camera matches the sampling rate of the image space, and performs registration operation with the image obtained by the high-resolution camera; the super-resolution image and registration information obtained by the low-resolution camera are combined with the image obtained by the high-resolution camera to extract The region where the reconstruction accuracy of the super-resolution algorithm is unqualified is taken as the reconstruction region on each frequency band; the region corresponding to the reconstruction region in the image obtained by the high-resolution camera is extracted, and a sample for frequency band restoration is constructed for each extracted region; The inventive method can utilize a limited number of super-resolution imaging models to realize continuous magnification digital zoom image synthesis, and can effectively utilize the rich texture details provided by the telephoto camera.

Description

technical field [0001] The invention relates to a bifocal imaging system and a computer image processing calculation, in particular to a bifocal camera digital zoom method based on frequency band restoration and super-resolution imaging. Background technique [0002] Digital cameras have gradually become the standard equipment on mass-produced smart phones. The industry has designed a large number of software programs based on these digital cameras. high demands. However, because mobile phones have relatively high requirements on the power consumption, volume, and cost of the devices mounted on them, it is rare to use optical zoom cameras on mobile phones. Instead, a dual-focus camera system is used: using two lenses with different focal lengths The fixed-focus camera forms an asymmetric optical system to simulate an optical zoom camera to achieve various functions such as background blur. [0003] When using a dual-focus camera system, a new problem will inevitably be int...

AI Technical Summary

Problems solved by technology

The traditional image fusion algorithm cannot transfer the texture information obtained by the high-resolution camera to other areas of the image obtained by the wide-angle camera outside the field of view of the telephoto camera, and the super-resolution algorithm that has been extensively researched can only limitedly improve the image obtained by the wide-angle camera. The quality of the telephoto camera cannot effectively utilize the large amount of detailed information obtained by the telephoto camera, and it can only zoom with a fixed magnification

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