Large screen fusion projection method

Abstract

The invention discloses a large screen fusion projection method comprising steps of: constructing a 3D model of a scaled-down exhibition hall by using a D modeling method and establishing an exhibition hall local 3D coordinate system; splicing the projection images of multiple projectors into a whole projection image by using an image splicing method and storing a whole projection image effect picture of a scaled-down whole projection image; simulating an effect model, projected onto a parallel screen, of the whole projection image effect picture by using a parallel projection method; acquiring control points on an annular screen, homonymous points, corresponding to the control points, on the effect model, and pixels on the whole projection image effect picture; computing a third transformation equation based on the control point coordinate values, homonymous point coordinate values, and pixel coordinate values; performing transformation computation on the real projection image according to the third transformation equation in order to project each pixel of the projection image into a correct position on the annular screen, thereby finishing geometric correction of a large screen projection image.

Description

technical field [0001] The invention relates to the field of image processing, in particular to a large-screen fusion projection method. Background technique [0002] The large-screen fusion projection method is a display system that uses multiple projectors to seamlessly project a three-dimensional scene on a large-size circular screen in real time. It has a larger display size, a wider field of view, and more Display content, higher display resolution, and more impactful and immersive visual effects are widely used in science, education, defense, entertainment, energy, manufacturing, and government. There are three key technologies in the large-screen fusion projection method, namely geometric correction, edge fusion technology and color consistency matching technology. [0003] The geometric correction solves the problem of projecting the rectangular display content projected by the projector to the correct position of the circular screen through the mapping equation; th...

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Problems solved by technology

[0007] For the mapping relationship between image coordinate systems, in order to obtain higher correction accuracy, the world coordinate value of the control point needs to retain a long number of decimal places, which requires a large amount of calculation, and the difference of one digit of the decimal point will cause a large error. Large calculation error, therefore, there is room for improvement

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