Projection device and keystone correction method thereof

Abstract

The invention discloses a projection device and a trapezoidal correction method thereof. The projection device includes a detection module, an image capture device, a processing module and an image correction unit. The detection module is used to obtain the first plane where the target object is located and the projection The first distance of the device and the installation position of the projection device, the image capture device is used to identify and track the target object, and acquire an image with the target object when the target object is in a stable state, and the processing module is used to store the target object The first distance and the installation position, and analyzing the image, the image correction unit is used to perform trapezoidal correction on the picture, wherein the processing module obtains the target object and the optical axis according to the first distance, the installation position and the image The second distance of the second plane where the optical axis is located and the third distance from the third plane where the optical axis is located, and the corresponding correction value is obtained according to the second distance and the third distance, and then the picture is processed according to the correction value Keystone correction.

Description

technical field [0001] The present invention relates to a projection device and its trapezoidal correction method, in particular to a projection device for performing trapezoidal correction by identifying the position of a human face and its trapezoidal correction method. Background technique [0002] In recent years, projection devices that project images on a screen have been rapidly popularized. Since projection devices are generally designed on the premise that they are installed facing the screen, when the viewer is not in a position facing the screen, , the image seen by the viewer will undergo trapezoidal deformation. [0003] At present, the automatic keystone correction of the projection device is realized by detecting the relationship between the optical axis of the projection device and the projection surface, such as distance and angle. In small home theaters, the projection device is often installed in a fixed position, such as hanging above the center of the t...

AI Technical Summary

Problems solved by technology

In small home theaters, the projection device is often installed in a fixed position, such as hanging above the center of the theater, so if the user does not manually correct, when the viewer is not in the position facing the screen, The image seen by the viewer will be trapezoidally deformed, so in order to prevent the image seen by the viewer from being trapezoidal, the viewer can only sit near the optical axis of the projection device, which will cause inconvenience to the user and affect the user experience

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