Autofocus imaging module and imaging method

Abstract

An automatic focus imaging module, which includes an imaging lens, an image sensor, a color separation unit, a processor, an image processing unit, a focusing driver and an optical image stabilization unit. The imaging lens is used to capture images of objects. The image sensor is used for sensing the image captured by the imaging lens. The color separation unit is used to represent the image sensed by the image sensor with three primary colors of red, green and blue respectively. The processor is used for performing MTF calculation on the image sensed by the image sensor, determining the current shooting mode according to the calculation result, and selecting and controlling the image processing unit or the focusing driver according to the determined current shooting mode. The optical image stabilization unit is used for detecting the shaking of the imaging lens before shooting, and performing vibration compensation on the imaging lens. The invention also relates to an imaging method.

Description

technical field [0001] The invention relates to an imaging module, in particular to an auto-focus imaging module and an imaging method. Background technique [0002] With the advancement of technology, the lens modules of most electronic devices have an auto-focus function. The autofocus technology of the lens module is divided into mechanical autofocus technology and digital autofocus technology. [0003] Mechanical autofocus technology uses a mechanical structure to move the lens inside the lens to focus. Since the mechanical focusing technology needs to adopt a complicated mechanical structure, the cost of the auto-focus lens increases and the volume is relatively large. [0004] Digital auto-focus technology uses software simulation and calculation to process the image sensed by the image sensor, so that the blurred image due to out-of-focus pixels on the image sensor becomes clear. For example, Extend Depth of Field (EDoF) technology uses the three primary colors of ...

AI Technical Summary

Problems solved by technology

However, the defect of digital autofocus is that it is not capable of short-range imaging. Generally speaking, if the object distance is within 40cm, the focusing effect of digital autofocus technology is often unsatisfactory.

In addition, if there is shaking during the shooting process, the EDoF technology will not be able to fully function, resulting in a decline in the imaging effect of the imaging module

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