Projection automatic geometric correction method based on optical sensor
A light sensor and geometric correction technology, which is applied to the image reproducer, picture reproducer, TV and other directions of the projection device, which can solve the problems of complicated wiring and difficulty in the production cost of projection equipment.
Active Publication Date: 2012-11-07
四川华控图形科技有限公司
View PDF1 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In this way, the production cost of the projection equipment and the difficulty of on-site construction will be greatly increased, especially the wiring of the wires from the light sensor to the control computer will become extremely complicated
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0052] Hardware parts:
[0053] Such as figure 1 As shown, the hardware part of the whole set of projection system is composed of six major elements: control computer 101, projection equipment 102, target projection screen 106, light diffusion film 108, light sensors such as 103, 104 and 105, etc., and signal acquisition box 107. During the geometric correction process, they function in a clockwise direction to form a complete closed-loop control system. At this time, the control computer 101 is in the geometric correction mode, and what it outputs to the projection device 102 is the light pattern sequence 100 . After the geometric correction is finished, the control computer switches to the projection mode, where it performs geometric pre-transformation on the input original image 112 and outputs the resulting image to the projection device 102 .
[0054] Both the projection device 102 and the projection screen 106 are in any posture, and a part 109 of the projected image o...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides an automatic geometry correction method of a projection based on an optical sensor, solves the problems of high cost and low precision of the existing correction method. An optical mode sequence is generated by a control computer, and each optical mode in the sequence is projected sequentially on a projection screen by projection equipment. The received light intensity is collected respectively by an optical sensor installed in the projection screen, and the analog signal is transmitted to data collecting equipment. Simultaneously, digital signals of the received light intensity of each optical sensor under each optical mode are read by the control computer. According to the collected signal history of the optical sensor, plane coordinates of the signal in the projected coordinate system are calculated by the control computer, and are taken as expected coordinates of the control points of a geometry correction grid on the projection screen. Accordingly, the projection screen is divided into a plurality of grids which are abutted with each other, according to the corresponding relation between the grid controlling points of the original image and that of the projection image, a geometry pre-transformation of the original image is carried out by the control computer, and the corresponding parts of the outcome image are respectively projected to each area covered by the small girds on the target projection screen so as to achieve the goal of geometry correction.
Description
technical field [0001] The invention relates to an automatic geometric correction method in seamless projection, in particular to an automatic geometric correction method based on a light sensor. Background technique [0002] The increasing popularity of digital projection equipment has made multi-channel ultra-high resolution data visualization and video entertainment possible. This type of projection requires multiple projection devices to work together. They are usually placed on the table or fixed on a stand, and at the same time project the original image to different parts of the same target projection screen, and finally use technical means to seamlessly project the image. are stitched together, and the image seen by the observer (hereinafter simply referred to as the observer image) is a complete ultra-large high-resolution image. One of the technical difficulties of image stitching is that after the reflection of the projection screen, the projection of the origina...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04N9/31H04N17/04
Inventor 叶茂赵平苏飏
Owner 四川华控图形科技有限公司