Perspective transformation method and device, electronic equipment and readable storage medium

A technology of perspective transformation and coordinate information, applied in the field of image processing, can solve problems such as face distortion and inaccurate calculation, and achieve the effect of avoiding face transformation and deformation

Pending Publication Date: 2022-06-03
GUANGZHOU HUYA TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when performing perspective transformation in the prior art, fitting methods such as the least squares method are generally used for fitting transformation. This method is prone to problems such as inaccurate calculation and distortion of human faces.

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  • Perspective transformation method and device, electronic equipment and readable storage medium
  • Perspective transformation method and device, electronic equipment and readable storage medium
  • Perspective transformation method and device, electronic equipment and readable storage medium

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Embodiment Construction

[0061] In order to make the purposes, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0062] Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtai...

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Abstract

The invention provides a perspective transformation method and device, electronic equipment and a readable storage medium, and aims at a face image collected by shooting equipment, a face region image in the face image is obtained through interception, and the face region image comprises a plurality of face key points. And constructing a virtual perspective camera, and obtaining a pose parameter of the virtual perspective camera according to a re-projection error between 3D coordinate information and 2D coordinate information of each face key point in the face region image and rigid transformation information of the face during perspective transformation. And finally, converting the 3D coordinate information of each face key point into virtual 3D coordinate information in a virtual perspective camera space based on the pose parameters. In the scheme, the re-projection error and rigid transformation information between the 3D point and the 2D point are comprehensively considered in perspective transformation, and good effects can be achieved on avoiding face transformation deformation and improving key point projection accuracy.

Description

technical field [0001] The present application relates to the technical field of image processing, and in particular, to a perspective transformation method, apparatus, electronic device, and readable storage medium. Background technique [0002] In recent years, face 3D keypoint detection has been widely used in the fields of face tracking, emotion recognition, and face VR special effects. In the field of face 3D key point detection, it usually involves cropping and other processing of the collected original image, resulting in changes in the internal and external parameters of the camera. Therefore, in order to accurately restore the position information of key points in the processed image, a virtual camera is generally constructed and the three-dimensional face information in the original world coordinate system is perspective-transformed into the virtual perspective camera space. [0003] However, in the prior art, when performing perspective transformation, a fitting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/00
CPCG06T3/0012
Inventor 杨云
Owner GUANGZHOU HUYA TECH CO LTD
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