Automatic tracking and focusing method and system for integrated camera
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A technology of automatic tracking and focusing method, applied in the parts of TV system, image communication, TV and other directions, can solve the problems of slow speed, long time consumption, inconsistent focusing position and actual expectations, etc.
Active Publication Date: 2014-10-01
SUZHOU KEDA TECH
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Problems solved by technology
[0005] For this reason, the technical problem to be solved by the present invention is that the method for automatic focusing in the prior art is slow and time-consuming, and there is a problem that the focus position of the camera is inconsistent with the actual expectation when imaging, so an integrated camera automatic tracking focus method is proposed and system
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Embodiment 1
[0110] This embodiment provides a method for automatic tracking and focusing of an integrated camera, such as image 3 shown, including the following steps:
[0111] S1: Set the target area in the current frame image, and calculate the FV value of the current frame image, where the proportion of the FV value of the target area is greater than the proportion of the FV value of the non-target area.
[0112] S2: Drive the focus lens to move to the current search position according to the search direction and search step. Initially, a search direction is given by the user, and the search step is set as a small step.
[0113] S3: Calculate the FV value of the current frame image, and judge whether the search is terminated, if yes, go to S4, otherwise return to step S2.
[0114] S4: Drive the focusing lens to the position corresponding to the maximum FV value to complete focusing.
[0115] Step S1 specifically includes the following process:
[0116] S11: Divide the current fram...
Embodiment 2
[0164] This embodiment provides an integrated camera automatic tracking focusing system, such as Figure 13 As shown, the following modules are included:
[0165] The target object area setting module is used to set the target object area in the current frame image, and calculate the FV value of the current frame image, wherein the proportion of the FV value of the target object area is greater than the proportion of the FV value of the non-target object area.
[0166] The search module is used to drive the focus lens to move to the current search position according to the search direction and the search step.
[0167] The calculation and judgment module is used to calculate the FV value of the current frame image and judge whether the search is terminated.
[0168] The focusing module is used to drive the focusing lens to the position corresponding to the maximum FV value to complete focusing.
[0169] The target area setting module specifically includes:
[0170] The bloc...
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Abstract
The invention provides an automatic tracking and focusing method and system for an integrated camera. A target object area is arranged, the proportion of the FV of the target object area is made to be larger than the proportion of the FV of a non-target object area, a focusing lens is driven to move, then, final searching judgment is performed, and finally, focusing is completed. The problem that the focusing position and actual expectation are not consistent when imaging is performed through the camera in a traditional 'hill climbing method' is solved, the focusing speed is high, and consumed time is short. After focusing, the target object area is tracked, and therefore the movement or position of a target object can be estimated, the focusing direction and the focusing area can be affirmed, focusing is triggered again when the target object area becomes vague or the displacement of the target object exceeds a determined threshold value, and it is guaranteed that automatic focusing is accurate. A step length changing searching method is adopted, efficiency can be improved, and automatic focusing speed is increased. A self-adaption estimation algorithm of an FV threshold value of a peak value area is adopted, and therefore automatic focusing can be faster.
Description
technical field [0001] The invention relates to an automatic focusing technology in the field of imaging, in particular to an automatic tracking and focusing method and system for an integrated camera. Background technique [0002] In recent years, the variable magnification integrated camera products have been enriched, and the autofocus module has become one of the main functional modules. This module changes the position of the focus lens by adjusting the focus motor so that the image clarity description value reaches the maximum, that is, reaches the focus position. The image sharpness description value is represented by the image FV (Focus Value), and the commonly used sharpness description operator is the magnitude of the high-frequency energy of the image obtained through statistics. [0003] Generally, when performing a focusing operation on a target, the corresponding relationship curve (called the search curve) between the position of the focusing lens and the ima...
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Application Information
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