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A Dome projection system design and implementation

Author: CaoShaoHua
Tutor: XiaoLaiYuan
School: Huazhong University of Science and Technology
Course: Software Engineering
Keywords: Dome movie Projector Geometric correction Color Correction Frame buffer texture remapping Template matching method Color calibration curve
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 76
Quote: 0
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Abstract


Dome movie is the use of a single or multiple projectors , projection screens in a complete spherical continuous picture. Dome films can exhibit high resolution, large viewing angle display, horizontal viewing angle can reach 360 degrees vertical viewing angle can be up to 200 degrees or more , you can bring the audience new visual experience , let the audience feel a strong visual shock and immersive feel. The ball screen projection system, since the projector mounting position is not the same position and the audience , and may be a system composed of a plurality of projectors , when the image is projected onto the spherical screen will have a certain degree of distortion , the projected image may be stretched or compressed , the color of the projected image bias , resulting in the difference between the projected image and the actual image , affecting the person's visual effects, so the need for a different projector to project images of 3D geometry correction and color correction. System selects Microsoft Visual C 6.0 for the development of the environment, in accordance with the software engineering method, first the system requirements analysis, system structure and gradually gives operational processes , and gives the geometric correction and color correction function module function module design. Geometric correction function module uses a polar coordinate system in the receiving surface based on the geometric characteristics of the projection frame buffer texture remapping technology to achieve geometric correction . Color correction function is divided into automatic color correction and manual color correction capabilities. Automatic color correction function module to be calibrated by selecting two channels , using template matching methods to achieve color correction. Manual color correction is through the color correction curve , increasing the color control point on the curve , cubic spline interpolation curve based on the principle of numerical calculation on the specified channel color correction so that the projected image as closely as possible the actual image colors. Image projection system through the automatic geometric correction and color correction , multiple projectors projected image stitching correctly and the correct projection, image distortion produced is very small , you can close to the actual image , to the human visual negligible extent .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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