Focusing stack imaging system presetting position calibration method based on focusing measurement

Abstract

The invention discloses a focusing stack imaging system presetting position calibration method based on focusing measurement. The focusing stack imaging system presetting position calibration method comprises the following steps: 1, setting a presetting position calibration environment; 2, collecting images of a calibration plate in a presetting position calibration environment at a presetting position and a corresponding II-type identification line; 3, calculating the focusing measure of each collected image, and obtaining a presetting position corresponding to the maximum focusing measure through data fitting; 4, verifying the repeatability and calibration accuracy of the mean value and variance presetting positions of multiple calibration results by adopting a method of calibrating thesame presetting position for multiple times; and 5, acquiring focusing stack data of an actual scene by using the calibrated presetting position, and reconstructing a scene depth map and a full-focusing map. The focusing stack imaging system presetting position calibration method can improve the focusing stack data collection efficiency, achieves the high-precision reconstruction of the depth of athree-dimensional scene, and also can provide reference and theoretical basis for the building of a three-dimensional digital space and the improvement of a calculation method.

Description

Technical field [0001] The invention relates to the technical field of computer vision and digital image processing, in particular to a focus stack imaging system preset position calibration method based on focus measurement. Background technique [0002] Focus stack imaging technology is to take a set of two-dimensional photos focused on different planes under a certain angle of view, and use image fusion to obtain the full focus and depth map of the scene. According to the light field theory, the focus stack is the compression of the light field data, and the focus stack can also be used to reconstruct the light field. As a key application of the focus stack imaging technology, the focus stack imaging system can obtain focus stack data to reconstruct the light field. Compared with the light field camera, the focus stack data collected by the focus stack camera has a higher resolution. There are fewer optics. [0003] The related research on focus stack imaging technology can be...

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