Projector capable of identifying front barrier and correcting output images

Abstract

The invention relates to a projector capable of identifying a front barrier and correcting output images. The projector comprises a projection control system, a projector lens, a camera module and an image processing module. A camera is used for obtaining the images of a barrier between a projector and a projector screen and a shadow on the projector screen, and sending the images to the image processing module; the image processing module judges whether there is a barrier or not according to the images collected by the camera, calculates the areas of the barrier and the screen shadow if there is the barrier, measures the distance between the barrier and the screen, and the distance between the barrier and the projector and further calculates the pixel positions shielded by the barrier at the location of a light source; the outputs of the image processing module are sent to the projection control system; and the projection control system controls the light outputs of the pixels of the shielded parts. According to the projector, the barrier in front of the projector can be automatically detected, the light source corresponding to the barrier is closed, and the barrier is prevented from being directly projected by the strong light of the projector.

Description

technical field [0001] The present invention relates to a projector. Background technique [0002] When the projector is showing, there may be obstacles on the optical path from the lens of the projector to the screen, such as someone passing by, or someone standing in front of the screen giving a speech, or a bottle or box is placed in front of the projector. Due to the high intensity of the light emitted by the projector, it will affect the eyesight when the light hits the human eyes; in addition, if there are substances that are exposed to light or heated and easily decomposed in front of the projector, the strong light of the projector will cause chemical changes in these substances and then It may even cause major accidents such as fire and explosion. On the other hand, when there is an obstacle in front, in order not to affect the normal viewing of the audience as much as possible, the output of the projector should not be directly turned off. To sum up, it is partic...

AI Technical Summary

Problems solved by technology

However, the camera is only used to obtain the image information on the screen so as to adjust the color of the image, and it does not have the function of automatically identifying obstacles.

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