Focusing curve establishing method and device

Abstract

The invention provides a focusing curve establishing method and device, and relates to the field of image processing. The method comprises the following steps: establishing a coordinate system by taking a zoom parameter as an abscissa and a focusing parameter as an ordinate, wherein an object distance in the process of capturing a to-be-processed image by a lens is a fixed value; adopting a monotonous hill climbing algorithm to determine preset zoom parameter key points in the coordinate system and focusing parameter points meeting preset clear conditions corresponding to the preset zoom parameter key points; and generating a focusing curve according to the focusing parameter points meeting the preset clear conditions and corresponding to the preset zooming parameter key points. Compared with the prior art, the efficiency of generating the focusing curve can be improved, the focusing curve capable of being followed actually is provided for zoom following of the simple electric lens, the focusing time of the simple electric lens is shortened and focusing jitter floating of the simple electric lens is weakened.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a method and device for establishing a focus curve. Background technique [0002] With the popularization of surveillance in safe cities, smart cities, and future snow-bright projects, the demand for cameras is increasing, and the demand for optical lenses, known as the "eyes" of cameras, is also increasing, especially in high-definition, In the tide of intelligence, with the improvement of resolution, the demand for high resolution and support for electric zoom lens is particularly strong. [0003] However, the price of an integrated lens with high-quality optical performance and support for precise control is relatively expensive, and the price-performance ratio of cheap motorized lenses makes more products choose to sacrifice zoom follow-up or auto-focus effects. [0004] The simple motorized lens technology and structure are much simpler than the integrated ...

AI Technical Summary

Problems solved by technology

[0003] However, the price of integrated lens with high-quality optical performance and support for precise control is relatively expensive, and the price performance ratio of cheap motorized lens makes more products choose to sacrifice zoom follow or auto focus effect

[0004] The simple motorized lens technology and structure are much simpler than the integrated movement lens, but because of the omission of the Pi point, precision slider and process differences, the control accuracy and return distance are relatively large. Most manufacturers only support full-scale search for this type of lens. The automatic focus, the focus blur is serious after zooming, the focus time is long, the process is repeatedly clear and blurred, and the focus effect experience is extremely poor

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