Integrated camera device and self-adapting automatic focus method

Abstract

The present invention relates to an integrated video camera device and self-adapting automatic focus method. The method includes: using climbing method to a curve composed of an evaluation function evaluating the definition and the definition evaluation values of multiple images acquired continuously, selecting a focus method base on the zooming situation, searching the peak of the curve and driving the lens to reach the focusing position corresponding to the peak of the curve, performing real time motion detection to the lens scenes upon searching the peak, driving the lens motor to startup a new cycle of automatic focus process when a certain degree of fuzzy is judged to appear on the lens scene or the moving scene varies and at a non-focus status. The invention has beneficial effects that the device and the method can effectively determine the focus direction in a variety of zoom magnifications, can 'recognize' images at fuzzy status and accelerate them out of the fuzzy status, and overcomes the problems of the traditional focus method that it is difficult to judge focus direction in the fuzzy region under high magnifications, and the traditional focus method has slow focus velocity and repeated oscillation.

Description

technical field [0001] The invention relates to an automatic focusing device and method in the field of imaging, in particular to an integrated camera device and an adaptive automatic focusing method. Background technique [0002] Recently, due to the rapid development of communication and information technology, especially the development of broadband and wireless communication technology, it provides great convenience for the rapid transmission of high-resolution and high-definition images, which further stimulates image acquisition and video entertainment consumer electronics. The development of digital cameras, video cameras and mobile phones with cameras. [0003] A general camera includes a module for continuously collecting images, a module for saving images and sounds, a module for sending images and sounds, and auxiliary modules such as automatic white balance and color correction to meet and improve the shooting performance of the camera under various conditions a...

AI Technical Summary

Problems solved by technology

Specifically, due to the large depth of field of the image at low magnification, the image is in a relatively clear state in a large range on both sides of the focus, and the corresponding focus evaluation value curve has smooth and obvious unimodal characteristics; and At higher magnifications, the depth of field of the image is very small, except for a very narrow area near the focus, the image is in a highly blurred state, and the corresponding focus evaluation curve shows no obvious curve trend in a large range Oscillating curves with more "burrs", so it is difficult to achieve fast, accurate and stable auto-focus at different zoom ratios, especially at higher zoom ratios, when using a focusing strategy similar to the traditional one

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