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US 11,768,423 B2Granted
Image acquisition apparatus, electronic device, image acquisition method and storage medium
AssigneeBeijing Xiaomi Mobile Software Co., Ltd.
InventorXuanzhao Wang
Life of this patent
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Abstract
An image acquisition apparatus includes a camera, a flash array adjacent to the camera, and a flash driving circuit connected to the flash array. In the process of image acquisition based on the image acquisition apparatus, a driving signal provided by the flash driving circuit may be used to drive corresponding flashes in the flash array to be lighted, a driving current for controlling each of the flashes may be adjusted to control the brightness of a respective one of the flashes. The number of lighted flashes in the flash array or the light supplement brightness of the lighted flashes may be adjusted adaptively according to different shooting scenes.
Claims7
A method for image acquisition, comprising:
- acquiring, by a terminal device, a preview image of an object to be acquired obtained by camera preview from a camera;
- determining, by the terminal device, a region to be supplemented with light from the preview image based on multiple difference values, each being a difference value between an actual image effect and a desired image effect of a respective one of regions of the preview image;
- determining, by the terminal device, according to a preset mapping relationship between the regions of the preview image and flashes from a flash array distributed adjacent to the camera and arranged in the terminal device together with the camera, one or more flashes corresponding to the region to be supplemented with light;
- and
- adjusting, by the terminal device, through increasing brightness of the flash array at a first angle of the object to be acquired facing towards the camera and reducing brightness of the flash array at a second angle of the object to be acquired facing away from the camera, values of a light supplement parameter of the one or more flashes corresponding to the region to be supplemented with light, wherein the light supplement parameter comprises at least one of following parameters:
- a number of lighted flashes in the flash array, or a light supplement brightness of the lighted flashes;
- detecting, by the terminal device, a shooting instruction after adjustment of the values of the light supplement parameter of the flash array;
- and
- upon detection of the shooting instruction, acquiring, by the terminal device, an image in an acquisition region corresponding to a region irradiated by the flash array after the adjustment of the values of the light supplement parameter.
6 more elements
A terminal device comprising:
- a processor;
- and
- a memory configured to store instructions executable by the processor;
- wherein the processor is configured to:
- acquire a preview image of an object to be acquired obtained by camera preview from a camera;
- determine a region to be supplemented with light from the preview image based on multiple difference values, each being a difference value between an actual image effect and a desired image effect of a respective one of regions of the preview image;
- determine, according to a preset mapping relationship between the regions of the preview image and flashes from a flash array distributed adjacent to the camera and arranged in the terminal device together with the camera, one or more flashes corresponding to the region to be supplemented with light;
- and
- adjust, through increasing brightness of the flash array at a first angle of the object to be acquired facing towards the camera and reducing brightness of the flash array at a second angle of the object to be acquired facing away from the camera, values of a light supplement parameter of the one or more flashes corresponding to the region to be supplemented with light, wherein the light supplement parameter comprises at least one of:
- a number of lighted flashes in the flash array, or a light supplement brightness of the lighted flashes;
- detect a shooting instruction after adjustment of the values of the light supplement parameter of the flash array;
- and
- upon detection of the shooting instruction, acquire an image in an acquisition region corresponding to a region irradiated by the flash array after the adjustment of the values of the light supplement parameter.
10 more elements
Dependencies are inferred from the claim text.