Irregular surface projection image geometric correction method based on ideal viewpoint

Abstract

The invention relates to an irregular surface projection image geometric correction method based on an ideal viewpoint. The method is characterized in that a kinect v2.0 and a projector are fixed to asupport adjustment mechanism, and the direction, pitching direction and angle of the support adjustment mechanism can be adjusted manually, and thus shooting angle of the kinect v2.0 and the projecting angle of the projector can be adjusted to ensure that the kinect v2.0 can capture all pictures projected by the projector; and the kinect v2.0 and the projector are connected with a computer through cables. The method comprises the following steps: to begin with, carrying out 3D modeling on an irregular projection surface, and establishing the ideal viewpoint and a viewpoint coordinate system;converting the 3D information value of the projection surface into a 3D information value under the viewpoint coordinate system; and carrying out geometric correction on the projection image under theviewpoint coordinate system. The method does not need camera-projector joint calibration, and adopts the ideal viewpoint as a reference instead of the camera to carry out geometric correction; and most significant feature is that the geometric correction based on the ideal viewpoint meets visual demands of an observer.

Description

technical field [0001] The invention relates to a geometric correction method of an irregular surface projection image based on an ideal viewpoint, and belongs to the technical field of computer vision. Background technique [0002] The projector was originally invented for the projection surface to be flat. When the projected picture is rectangular, it conforms to the perception characteristics of human vision. When the projection surface is non-planar, the projected picture will be distorted. The current projectors have built-in horizontal and vertical keystone correction functions, but usually the built-in correction of the projector cannot meet the requirements of geometric correction. At this time, it is necessary to make adjustments to the projection screen, so the projector adapts to the geometric correction of the projection environment. It is a research hotspot in the projection system. [0003] The most commonly used method for geometric correction of the projecto...

AI Technical Summary

Problems solved by technology

This method is easily constrained by various external environmental factors, such as the reflection properties of the projection surface medium, the lighting conditions of the camera, the background interference of the projection environment, etc.

[0004] To sum up, in the existing geometric correction methods, the camera is usually used as the benchmark, which may lead to the farther the observer is from the camera, the less the corrected image meets the observer's visual needs

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