Method, device and equipment for acquiring high-dynamic range image based on double cameras

Abstract

The invention discloses a method, a device and equipment for acquiring a high-dynamic range (HDR) image based on double cameras. The method comprises the following steps: obtaining a normal exposure image under a current shooting scene; determining an underexposure compensation value and an overexposure compensation value under the current shooting scene; controlling the first camera to obtain anunderexposure image and the second camera to obtain an overexposure image according to the underexposure compensation value and the overexposure compensation value; performing fusion processing on thenormal exposure image, the underexposure image and the overexposure image and generating the high-dynamic range under the current scene. The method disclosed by the invention has the beneficial effects that through simultaneously and respectively shooting images of different levels of exposure required by the HDR image by utilizing the double cameras, not only is the shooting time of the HDR image shortened, but also the ghosting of the finally-synthesized HDR image can be effectively avoided, so that the effect and the quality of the high-dynamic range image are improved, and the user experience is improved.

Description

technical field [0001] The present application relates to the technical field of image processing, in particular to a dual-camera-based high dynamic range image acquisition method, device and equipment. Background technique [0002] Nowadays, most cameras in terminal devices support a high-dynamic range (High-Dynamic Range, HDR for short) camera mode to acquire HDR images. HDR images can provide more dynamic range and image details than ordinary images. [0003] In order to obtain HDR images, usually by controlling the exposure, take multiple images with different exposures, such as: three images of normal exposure image, underexposed image and overexposed image, and then multiple images with different exposures Fusion processing to obtain HDR images. [0004] However, at present, when acquiring HDR images, it is necessary to shoot multiple times continuously, and there is a large delay in the shooting process between the captured normal exposure images, underexposed image...

AI Technical Summary

Problems solved by technology

[0004] However, at present, when acquiring HDR images, it is necessary to shoot multiple times continuously, and there is a large delay in the shooting process between the captured normal exposure images, underexposed images and overexposed images, which not only makes the acquisition time of HDR images longer, but also when When there are moving objects in the shooting scene, the content of multiple pictures will change, which will lead to ghosting in the final composite HDR image, reducing the quality and effect of the HDR image

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