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Curtain-based projection area acquisition method and projection device

A projection area and acquisition method technology, applied in the field of projection, can solve problems such as uneven color, deviation, and inaccurate acquisition of projection area information, and achieve the effect of improving accuracy and reducing impact

Active Publication Date: 2020-02-07
CHENGDU XGIMI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to factors such as the light of the projector light machine and the light of the environment where the projector is located, the curtain will reflect light. The black curtain will reflect white light, and the white curtain will cause uneven color due to reflection. Such reflection results make the projector suitable for calculation and acquisition of the curtain. There will be deviations in the projected projection area. Since the reflection of the screen cannot be completely overcome, the problem of inaccurate acquisition of projection area information caused by the reflection of the screen has always existed. How to reduce the impact of the reflection of the screen and improve the accuracy of obtaining the projection area on the screen Accuracy is very important

Method used

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  • Curtain-based projection area acquisition method and projection device
  • Curtain-based projection area acquisition method and projection device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Such as figure 1 As shown, this embodiment provides a method for acquiring a projection area based on a curtain, which is applied to a projection device equipped with a camera, including:

[0036] Step S1: Take pictures and obtain a picture A containing a curtain, and there is no projected image on the curtain;

[0037] Step S2: Binarize the picture A according to the method to obtain the binarized picture A1; perform binarization on the picture A according to the second method to obtain the binarized picture A2;

[0038] Step S3: Obtain the black connected region Q1 with the largest area in the binarized picture A1, and obtain the area S1 of the connected region Q1; obtain the white connected region Q2 with the largest area in the binarized picture A2, and obtain The area S2 of the connected area Q2;

[0039] Step S4: Calculate the mean value B1 of pixels in the region corresponding to the connected region Q1 in the picture A, and calculate the mean value W1 of pixel...

Embodiment 2

[0056] Such as figure 2 As shown, this embodiment provides a projection device, including:

[0057] Shooting module: used to shoot and obtain a picture A containing a curtain, and there is no projected image on the curtain;

[0058] The first picture processing module: used to perform binarization processing on the picture A according to the method to obtain the binarized picture A1; also used to perform binarization processing on the picture A according to the second method to obtain the binarization Picture A2;

[0059] The second picture processing module: used to obtain the black connected region Q1 with the largest area in the binarized picture A1, and to obtain the area S1 of the connected region Q1; also used to obtain the area in the binarized picture A2 The largest white connected region Q2, and obtain the area S2 of the connected region Q2;

[0060] Calculation module: used to calculate the pixel mean value B1 in the area corresponding to the connected area Q1 in...

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Abstract

The invention discloses a Curtain-based projection area acquisition method. The method comprises the steps of obtaining a picture A containing the curtain through shooting; performing binarization processing on the picture A according to the mode I to obtain a binarized picture A1; performing binarization processing on the picture A according to a mode II to obtain a binarized picture A2; obtaining a black connected region Q1 with the largest area in the binarized picture A1, and obtaining the area S1 of the connected region Q1; obtaining a white connected region Q2 with the largest area in the binarized picture A2, and obtaining an area S2 of the connected region Q2; calculating a pixel mean value B1 in an area, corresponding to the communication area Q1, in the picture A, and calculatinga pixel mean value W1 in an area, corresponding to the communication area Q2, in the picture A; and dETERMINING A TARGET PROJECTION AREA. According to the invention, the final curtain projection areais determined through mutual verification of the assumed color of the curtain and the binarization processing result, the influence of curtain reflection can be reduced, and the accuracy of obtainingthe projection area on the curtain is improved.

Description

technical field [0001] The present invention relates to the field of projection, in particular to a screen-based method for acquiring a projection area and a projection device. Background technique [0002] A projector, also known as a projector, is a device that can project images or videos onto a screen. It can be connected to a computer, DV, etc. through different interfaces to play corresponding images or video signals. Projectors are currently widely used in homes, Offices, schools and entertainment places, according to different working methods, there are different types of CRT, LCD, DLP and so on. [0003] Due to factors such as the light of the projector light machine and the light of the environment where the projector is located, the curtain will reflect light. The black curtain will reflect white light, and the white curtain will cause uneven color due to reflection. Such reflection results make the projector suitable for calculation and acquisition of the curtain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/31
CPCH04N9/3182
Inventor 钟波肖适王鑫张立造
Owner CHENGDU XGIMI TECH CO LTD