Method and device for calculating stripe width in stripe target plate, equipment and medium

Abstract

The invention discloses a method, device and equipment for calculating the width of stripes in a stripe target plate and a medium, and the method comprises the steps: photographing a preselected stripe target plate through a camera module, and obtaining a corresponding stripe image which comprises the imaging regions of bright stripes and dark stripes in the stripe target plate, the bright stripes and the dark stripes in the stripe target plate are arranged at equal intervals; performing width calculation on an imaging area of a target stripe in the stripe image to obtain the average stripe width, the target stripe being the bright stripe or the dark stripe; and determining the real stripe width of the stripe target plate according to the average stripe width. By adopting the method, the real stripe width of the stripe target plate can be quickly and accurately calculated.

Description

technical field [0001] The present invention relates to the technical field of terminals, and in particular, to a method, device, equipment and medium for calculating stripe width in a stripe target. Background technique [0002] With the maturity of the Phase Detection Auto Focus (PDAF) technology of camera modules, most camera modules will perform PDAF calibration. Especially in recent years, Qualcomm PDAF technology has been widely used in smartphones. At present, when the camera module is out of the factory for PDAF calibration, the stripe target plate (such as a chart) recommended by the manufacturer is usually used for PDAF calibration. Specifically, the images captured by the camera module include masked pixels that appear in pairs and have certain regularities, and these paired masked pixels with certain regularities are detected by using a chart to complete PDAF calibration. [0003] However, in practice, it is found that the width of the stripes in the striped ta...

AI Technical Summary

Problems solved by technology

This will lead to the selection of the wrong width of the stripe target for calibration in the production calibration of the camera module, which will cause errors in the calibration of the camera module and affect the accuracy and quality of the camera module

It can be seen that it is very important to select a suitable fringe target for calibration of different types of camera modules, but the width of the stripes in the fringe target cannot be directly obtained. Therefore, before the camera module is calibrated, how to calculate the The stripe width is an important problem that needs to be solved urgently

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