CN112631048A - Anti-jitter control method for picture in moving process of projector - Google Patents

Abstract

The invention discloses a picture anti-jitter control method in the moving process of a projector, which comprises the following steps of S1, collecting voltage data output by XYZ three axes in the moving process of the projector and picture data before and after the movement of the projector; step S2, calculating XYZ triaxial acceleration according to the voltage data output by the XYZ triaxial and calculating neutral acceleration according to the picture data before and after moving; step S3, calculating the space angle of the projector movement according to the XYZ triaxial acceleration and the neutral acceleration; step S4 is to calculate the relative movement position of the motor in the lens direction according to the space angle of the movement of the projector, and control the motor to adjust the lens, so as to automatically calibrate the lens and reduce the image jitter during the movement process.

Description

Anti-jitter control method for picture in moving process of projector

[ technical field ]

The invention relates to a picture anti-jitter control method in the moving process of a projector.

[ background art ]

With the development of projection technology in recent years, projectors have been widely used in the fields of home, education, office, and the like, wherein laser projectors are more widely used because of the advantages of brightness, life span, and color gamut. Meanwhile, with the development of projection technology, the requirements on performance are higher and higher, and the performance mainly includes pictures, resolution, brightness, contrast, color and the like.

However, the lens of the original projector only has the functions of displacement, focusing and zooming, so that the lens of the projector is fixed when not in operation and does not have the function of automatic correction, and therefore, a jittering picture appears in the moving process of the projector.

[ summary of the invention ]

The invention overcomes the defects of the technology and provides a picture anti-jitter control method in the moving process of the projector capable of automatically calibrating the lens.

In order to achieve the purpose, the invention adopts the following technical scheme:

a picture anti-shake control method in the moving process of a projector comprises the following steps:

s1, acquiring voltage data output by XYZ three axes in the moving process of the projector and picture data before and after the projector moves;

step S2, calculating XYZ triaxial acceleration according to the voltage data output by the XYZ triaxial and calculating neutral acceleration according to the picture data before and after moving;

step S3, calculating the space angle of the projector movement according to the XYZ triaxial acceleration and the neutral acceleration;

and step S4, calculating the relative movement position of the motor in the lens direction according to the space angle of the movement of the projector, and controlling the motor to adjust the lens.

The method for controlling the anti-shaking of the picture in the moving process of the projector is characterized in that: step S1 specifically includes: and respectively arranging an acceleration sensor at the conversion position, the zooming position and the focusing position of the lens of the projector.

The method for controlling the anti-shaking of the picture in the moving process of the projector is characterized in that: step S1 specifically includes: the DLP digital light processor respectively performs normalization processing on the voltages output by the conversion position acceleration sensor, the zoom position acceleration sensor and the focus position acceleration sensor

The method for controlling the anti-shaking of the picture in the moving process of the projector is characterized in that: step S1 specifically includes: and the DLP digital light processor converts the maximum signal and the minimum signal output by the position acceleration sensor, the zoom position acceleration sensor and the focus position acceleration sensor into a maximum value and a minimum value respectively.

The method for controlling the anti-shaking of the picture in the moving process of the projector is characterized in that: the calculating XYZ triaxial acceleration from the voltage data output by the XYZ triaxial in step S2 includes: the DLP digital light processor subtracts the minimum value from the maximum value converted by the acceleration sensors in each direction to obtain the output range of each acceleration sensor, subtracts the minimum value from the signal value output by each acceleration sensor in the displacement process, and divides the signal value by the output range of the corresponding acceleration sensor to obtain the XYZ triaxial acceleration; calculating the neutral acceleration according to the data of the images before and after the movement comprises calculating the neutral acceleration according to the lens image before the movement and the lens image after the movement by the DLP digital light processor.

The method for controlling the anti-shaking of the picture in the moving process of the projector is characterized in that: in step S3, the calculation of the spatial angle of the projector movement according to the XYZ three-axis acceleration and the neutral acceleration includes: the method comprises the following steps of obtaining an included angle between an XYZ axis and a neutral acceleration by utilizing the component relation between the acceleration of the XYZ axis and the neutral acceleration in the three-axis acceleration XYZ axis when the lens is static, and obtaining the relation between the lens and an original inclined foot moving when the lens is static, wherein the component relation between the acceleration of the XYZ axis and the neutral acceleration in the three-axis acceleration XYZ:

α＝atan(A_x/sqrt(A_y^²+A_z^²))

β＝atan(A_y/sqrt(A_x^²+A_z^²))

γ＝atan(sqrt(A_x^²+A_y^²)/A_z)

wherein, Ax Ay Az is the component of the neutral acceleration on three axes of xyz;

the space angle of the movement of the projector is obtained through the relation between the lens and the inclined foot which moves when the lens is originally static.

The invention has the beneficial effects that:

the invention sets an acceleration sensor at the conversion position, the zoom position and the focus position of the projector lens, and the DLP digital light processor respectively carries out normalization processing on the voltages output by the conversion position acceleration sensor, the zoom position acceleration sensor and the focus position acceleration sensor, thereby calculating the acceleration of XYZ three axes, calculating the neutral acceleration according to the image data before and after movement, calculating the space angle of the movement of the projector according to the acceleration of the XYZ three axes and the neutral acceleration, controlling the motor to adjust the lens by calculating the space angle of the movement of the projector, realizing automatic lens calibration and reducing the jitter of the image in the movement process.

[ detailed description of the invention ]

The following is described in further detail by way of embodiments of the invention:

a picture anti-shake control method in the moving process of a projector comprises the following steps:

s1, acquiring voltage data output by XYZ three axes in the moving process of the projector and picture data before and after the projector moves; setting an acceleration sensor at the conversion position, the zooming position and the focusing position of the lens of the projector respectively; the DLP digital light processor respectively performs normalization processing on the voltages output by the conversion position acceleration sensor, the zooming position acceleration sensor and the focusing position acceleration sensor; and the DLP digital light processor converts the maximum signal and the minimum signal output by the position acceleration sensor, the zoom position acceleration sensor and the focus position acceleration sensor into a maximum value and a minimum value respectively.

Step S2, calculating XYZ triaxial acceleration according to the voltage data output by the XYZ triaxial and calculating neutral acceleration according to the picture data before and after moving; calculating the XYZ triaxial acceleration from the voltage data output by the XYZ triaxial includes: the DLP digital light processor subtracts the minimum value from the maximum value converted by the acceleration sensors in each direction to obtain the output range of each acceleration sensor, subtracts the minimum value from the signal value output by each acceleration sensor in the displacement process, and divides the signal value by the output range of the corresponding acceleration sensor to obtain the XYZ triaxial acceleration; calculating the neutral acceleration according to the data of the images before and after the movement comprises calculating the neutral acceleration according to the lens image before the movement and the lens image after the movement by the DLP digital light processor.

Step S3, calculating the space angle of the projector movement according to the XYZ triaxial acceleration and the neutral acceleration; calculating the space angle of the movement of the projector according to the XYZ triaxial acceleration and the neutral acceleration comprises the following steps: the method comprises the following steps of obtaining an included angle between an XYZ axis and a neutral acceleration by utilizing the component relation between the acceleration of the XYZ axis and the neutral acceleration in the three-axis acceleration XYZ axis when the lens is static, and obtaining the relation between the lens and an original inclined foot moving when the lens is static, wherein the component relation between the acceleration of the XYZ axis and the neutral acceleration in the three-axis acceleration XYZ:

α＝atan(A_x/sqrt(A_y^²+A_z^²))

β＝atan(A_y/sqrt(A_x^²+A_z^²))

γ＝atan(sqrt(A_x^²+A_y^²)/A_z)

wherein, Ax Ay Az is the component of the neutral acceleration on three axes of xyz;

the space angle of the movement of the projector is obtained through the relation between the lens and the inclined foot which moves when the lens is originally static.

And step S4, calculating the relative movement position of the motor in the lens direction according to the space angle of the movement of the projector, and controlling the motor to adjust the lens, so that the lens can be automatically calibrated, the lens can be ensured to relatively move in the movement process of the picture, and the smoothness of the picture and the jitter can be reduced.

Claims (6)

1. A picture anti-shake control method in the moving process of a projector comprises the following steps:

s1, acquiring voltage data output by XYZ three axes in the moving process of the projector and picture data before and after the projector moves;

step S2, calculating XYZ triaxial acceleration according to the voltage data output by the XYZ triaxial and calculating neutral acceleration according to the picture data before and after moving;

step S3, calculating the space angle of the projector movement according to the XYZ triaxial acceleration and the neutral acceleration;

and step S4, calculating the relative movement position of the motor in the lens direction according to the space angle of the movement of the projector, and controlling the motor to adjust the lens.

2. The method as claimed in claim 1, wherein the method comprises the steps of: step S1 specifically includes: and respectively arranging an acceleration sensor at the conversion position, the zooming position and the focusing position of the lens of the projector.

3. The method as claimed in claim 2, wherein the method comprises the steps of: step S1 specifically includes: and the DLP digital light processor respectively performs normalization processing on the voltages output by the conversion position acceleration sensor, the zooming position acceleration sensor and the focusing position acceleration sensor.

4. The method as claimed in claim 3, wherein the method comprises the steps of: step S1 specifically includes: and the DLP digital light processor converts the maximum signal and the minimum signal output by the position acceleration sensor, the zoom position acceleration sensor and the focus position acceleration sensor into a maximum value and a minimum value respectively.

5. The method as claimed in claim 4, wherein the method comprises the steps of: the calculating XYZ triaxial acceleration from the voltage data output by the XYZ triaxial in step S2 includes: the DLP digital light processor subtracts the minimum value from the maximum value converted by the acceleration sensors in each direction to obtain the output range of each acceleration sensor, subtracts the minimum value from the signal value output by each acceleration sensor in the displacement process, and divides the signal value by the output range of the corresponding acceleration sensor to obtain the XYZ triaxial acceleration; calculating the neutral acceleration according to the data of the images before and after the movement comprises calculating the neutral acceleration according to the lens image before the movement and the lens image after the movement by the DLP digital light processor.

6. The method as claimed in claim 5, wherein the method comprises the steps of: in step S3, the calculation of the spatial angle of the projector movement according to the XYZ three-axis acceleration and the neutral acceleration includes: the method comprises the following steps of obtaining an included angle between an XYZ axis and a neutral acceleration by utilizing the component relation between the acceleration of the XYZ axis and the neutral acceleration in the three-axis acceleration XYZ axis when the lens is static, and obtaining the relation between the lens and an original inclined foot moving when the lens is static, wherein the component relation between the acceleration of the XYZ axis and the neutral acceleration in the three-axis acceleration XYZ:

α＝atan(A_x/sqrt(A_y ^{^2}+A_z ^{^2}))

β＝atan(A_y/sqrt(A_x ^{^2}+A_z ^{^2}))

γ＝atan(sqrt(A_x ^{^2}+A_y ^{^2})/A_z)

wherein, Ax Ay Az is the component of the neutral acceleration on three axes of xyz;

the space angle of the movement of the projector is obtained through the relation between the lens and the inclined foot which moves when the lens is originally static.