Focal plane positioning method, processing device, focal plane positioning system, and storage medium

Abstract

The focal plane positioning method, the processing device, the focal plane positioning system and the storage medium of the present invention are provided. By acquiring a first depth image of the scene by acquiring at least one depth camera located above the scene, and intercepting a second depth image corresponding to the height of the pedestrian head from the second depth image; detecting respective pedestrian heads therein for the second depth image; locating image coordinates of a reference point on a pedestrian head in the second depth image, and mapping the image coordinates to world coordinates using internal and external parameters of the depth camera; the world coordinates of the reference point are mapped to the coordinates of the camera coordinate system by using the external parameters of the front camera, and the depth data of the first focal plane where the reference point is located is obtained. Obtaining the distance between the reference point and the second focal plane where the face is located, and shifting the distance to obtain the second focal plane where the face is located; refocusing the front camera on the second focal plane to obtain a corresponding faceimage. The invention can realize precise focusing extraction of faces with different depths in the same image.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a focal plane positioning method, a processing device, a focal plane positioning system and a storage medium. Background technique [0002] As an electromagnetic field distributed in space, light has various properties such as amplitude, phase, and wavelength, and helps humans perceive the brightness, position, and color of objects. However, traditional optical imaging intelligently captures the projected intensity of light radiation on a two-dimensional plane, while losing the three-dimensional shape data of the target. Light field data collection is to obtain the complete distribution of light radiation, and calculate the required image through data processing methods such as transformation and integration. Light field imaging refers to the process of collecting and processing the light field into an image. Light field imaging is a computational imaging techn...

AI Technical Summary

Problems solved by technology

For fixed scenes with a single application range, the focal plane can be manually set directly so that the light field system can be fixed on the same focal plane for light field rendering; for scenes that require foreground focus, image algorithms can be used to measure the scene foreground distance, so as to estimate the focal plane distance, the accuracy of this method largely depends on the effectiveness of the distance measurement method and the complexity of the scene environment; for the application of multi-focus plane requirements, the method of scanning focus can be used, that is Set different focus planes from far to near, know the light field focus, but this kind of focus method, first, has nothing to do with the scene content, so I don’t know which focus plane is accurate, and second, its effect depends on the scanning focal resolution

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