Backlight photographing method and device

Abstract

The invention provides a backlight photographing method and device, and the method comprises the steps: detecting whether a photographed scene is photographed in a backlight manner or not; determining the size of a head-shoulder region corresponding to a portrait of a photograph object in the photographed scene through head-shoulder detection if the photographed scene is photographed in the backlight manner; determining the distance from the portrait to a camera according to the size of the head-shoulder region, automatically focusing the head-shoulder region in the portrait according to the distance, and photographing and obtaining a first image; The method and device can effectively detect the head-shoulder region in the portrait in the backlight scene through head-shoulder detection, can achieve the automatic photographing of a clear image of the head-shoulder region in the backlight scene, and cannot cause a black face phenomenon because of poor exposure of a person.

Description

technical field [0001] The present invention relates to the field of information technology, in particular to a backlight photographing method and device. Background technique [0002] With the improvement of shooting technology of cameras and terminals, especially smart shooting terminals, people have higher and higher requirements for the quality of captured images, especially when shooting in backlit scenes. Among them, when shooting in a backlit scene, the light-receiving surface of the object to be photographed is smaller than the backlight surface, so that the light ratio between the light-receiving surface and the backlight surface of the object to be photographed is large, and the contrast is strong. [0003] At present, autofocus based on face detection is widely used in cameras and terminals. Face detection is performed on the subject when shooting, and the distance between the subject and the camera is determined according to the size of the face in the image, so ...

AI Technical Summary

Problems solved by technology

However, when shooting in a backlit scene, when the backlit surface of the face area in the image obtained based on face detection is relatively large, the face is darker than the objects in the surrounding environment, making the skin color of the face in the captured image It is dark, showing the effect of a black face, making it impossible to extract features from the acquired image, so that it cannot automatically focus according to the face area, resulting in blurred and low-quality images

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