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Curtain-based projection area acquisition method and projection device
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A technology of projection area and acquisition method, applied in the field of projection, can solve the problems of deviation, uneven color, inaccurate information acquisition of projection area, etc., and achieve the effect of reducing influence and improving accuracy
Active Publication Date: 2021-11-09
CHENGDU XGIMI TECH CO LTD
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[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
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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 black connected region Q1; obtain the white connected region Q2 with the largest area in the binarized picture A2, and Acquiring the area S2 of the white connected region Q2;
[0039] Step S4: Calculate the mean value B1 of pixels in the area corresponding to the black connected area Q1 in the picture A, and calculate the mea...
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 obtain the area S1 of the black connected region Q1; meanwhile, it is also used to obtain the black connected region Q1 in the binarized picture A2 The white connected region Q2 with the largest area, and obtaining the area S2 of the white connected region Q2;
[0060] Calculation module: used to calculate the mean valu...
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Abstract
The invention discloses a method for obtaining a projection area based on a curtain, comprising: taking a picture A including a curtain; performing a binarization process on the picture A according to a method to obtain a binarized picture A1; and pairing the picture A according to a method Perform binarization processing to obtain the binarized image A2; obtain the largest black connected region Q1 in the binarized image A1, and obtain the area S1 of the connected region Q1; obtain the largest white connected region in the binarized image A2 Q2, and obtain the area S2 of the connected area Q2; calculate the pixel mean value B1 in the area corresponding to the connected area Q1 in the picture A, and calculate the pixel mean value W1 in the area corresponding to the connected area Q2 in the picture A; determine the target projection area. The present invention determines the final screen projection area by mutually verifying the assumed color of the screen and the binarization processing result, which can reduce the influence of the reflection of the screen and improve the accuracy of obtaining the projection area on the screen.
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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