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Method and system for automatic focusing on multi-point reference image recognition

An automatic focusing and image recognition technology, applied in the field of projection systems, can solve the problems of blurred edges and corners, the center of the projection image is clear, and the overall viewing effect is not achieved, and achieves the effect of uniform image resolution and accurate focusing.

Inactive Publication Date: 2016-02-03
PIQS TECHNOLOGY (SHENZHEN) LIMITED
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Problems solved by technology

[0003] There is a prerequisite for using this method, that is, the imaging resolution of the projection lens is very high, and the entire projection screen is required to be very clear. However, due to factors such as part accuracy and assembly errors, the resolution of the projection lens is in the range of The center position is better than the surrounding position, so using this method to automatically adjust the focus often results in a very clear center of the projection screen, but blurred corners, which does not achieve the overall viewing effect

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[0036] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described in detail with reference to the accompanying drawings.

[0037] Such as figure 1 As shown, the system for auto-focusing multi-point reference image recognition in a preferred embodiment of the present invention includes: a projection module for projecting multi-point reference images distributed at different points on a predetermined projection surface S; A drive module, used to drive the focusing lens assembly 1 to change the focusing state to adjust the focal length of the projection, to change the definition of the multi-point reference figure; the monitoring module, used to obtain the image information of the multi-point reference image at different focal lengths; the best The parameter acquisition module is used to obtain the focusing parameters when the multi-point refe...

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Abstract

The invention relates to a method and system for automatic focusing on multi-point reference image recognition. The method comprises the following steps of S1, projecting a multi-point reference image distributed on different points on a predetermined projection surface; S2, driving a focusing lens assembly to convert a focusing state so as to adjust a focal length of projection; S3, acquiring image information of the multi-point reference image at different focal lengths; S4, obtaining focusing parameters of the clearest multi-point reference image according to the image information at different focal lengths; and S5, adjusting the focusing lens assembly to the corresponding focusing state according to the focusing parameters of the clearest multi-point reference image. According to the method and the system for automatic focusing on multi-point reference image recognition, disclosed by the invention, focusing is more accurate through multi-point focusing, the resolution of the image projected on the projection surface is uniform, and the image entirely looks more clearly.

Description

technical field [0001] The present invention relates to a projection system, and more specifically, to a method and system for automatically adjusting focus for multi-point reference image recognition. Background technique [0002] There are two types of automatic focusing technology currently used in projection, ranging method and image analysis method. In the image analysis method, a focusing reference image is projected in the center area of ​​the projection screen, and the projected reference image is analyzed. Sharpness status, and complete the auto-focus process. [0003] There is a prerequisite for using this method, that is, the imaging resolution of the projection lens is very high, and the entire projection screen is required to be very clear. However, due to factors such as part accuracy and assembly errors, the resolution of the projection lens is in the range of The center position is better than the surrounding position, so using this method to automatically a...

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Application Information

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IPC IPC(8): G03B21/53H04N9/31
CPCG03B21/53H04N9/317
Inventor 那庆林麦浩晃黄彦
Owner PIQS TECHNOLOGY (SHENZHEN) LIMITED
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