Face photometric point selection method and device and photographing device

Abstract

The invention provides a face photometric point selection method and device and a photographing device. That method and apparatus are applied to a photographing apparatus, in particular, pixel segmentation is performed on a facial image to obtain a plurality of pixel blocks; the data of the pixel blocks are counted to obtain parameters of each pixel block, the parameters include the distance fromthe pixel block to the face center point, the maximum value, the minimum value, the mean value and the coordinates of the center point. According to the preset formula, the distance, the maximum value, the minimum value and the mean value are calculated, and the target pixel block is obtained from a plurality of pixel blocks, and the center point of the target pixel block is output as the optimalphotometric point of the human face. By dynamically determining the optimal photometric point, the inherent defects of the fixed photometric point are avoided. Specifically, the problem of inaccuratephotometric point is avoided by avoiding the high-bright reflecting light which is generally selected at the tip of nose as the parameter of photometric point.

Description

technical field [0001] The present disclosure relates to the technical field of photographing, and in particular to a method, a device and a photographing device for selecting photometry points on a face. Background technique [0002] Shooting has become the standard configuration of some mobile devices at present, which brings great convenience and enjoyment to people's life. During the shooting process, whether the exposure is accurate or not will affect the details of the bright and dark parts of the photo or video, and the exposure is based on its photometry results. [0003] At present, when shooting portraits, the position of the selected metering point is relatively fixed, that is, the center point of the face is selected for metering, and what is worse is that the center of the face is generally located at the tip of the nose, which is prone to highlight Reflective light, resulting in inaccurate metering. Contents of the invention [0004] In order to overcome th...

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Problems solved by technology

[0003] At present, when shooting portraits, the position of the selected photometry point is relatively fixed, that is, the center point of the face is selected for photometry, and what is worse is that the center of the face is generally located at the tip of the nose, which is prone to highlight Reflective light, resulting in inaccurate metering

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