Eye location method for Pepper's ghosts

Abstract

The invention discloses an eye location method for Pepper's ghosts, and relates to the technical field of projection images. The method comprises the following steps of: 1, coarse eye location: obtaining eye windows through detecting obvious troughs at positions, projected at eyebrows, eyes and mouth, of horizontal integrals by utilizing a rule of three courts and five eyes; 2, carrying out regionprojection on an eye sample; 3, coarse pupil region location: obtaining a small region Rij which comprises a part of the pupil, and combining the small region with surrounding 8 neighborhoods to obtain a region which comprises the pupil; 4, fine pupil region location: for the obtained window which comprises the pupil, accurately obtaining a central coordinate of the eye by utilizing greyscale characteristics of the eyeball and the surrounding region as the greyscale value of the pupil is lower than the greyscale value of the surrounding area. The method is capable of strengthening the adaptation, to different illuminations, of images, and insensitive to greyscale interferences caused by hair, wrinkles and the like.

Description

technical field [0001] The invention relates to the technical field of projection images, in particular to a Pepper's ghost human eye positioning method. Background technique [0002] The human eye positioning method in the existing Pepper's ghost projection system The human eye positioning method is mainly projection on a certain row or a certain column. This one-dimensional projection method makes the grayscale effect of the projection result on hair, shadows, etc. It is very sensitive, and often forms multiple peaks or troughs in the projection curve, so the calculation error will inevitably increase in the actual calculation process, resulting in a decrease in positioning accuracy. If the eye area of ​​the face image is disturbed by forehead hair, even if the forehead hair is rare and the interference is very light, it will directly cause many valleys in the projection result, which makes it very difficult to determine the pupil position. Contents of the invention [...

AI Technical Summary

Problems solved by technology

[0002] The human eye positioning method in the existing Pepper's ghost projection system The human eye positioning method is mainly projection on a certain row or a certain column. This one-dimensional projection method makes the grayscale effect of the projection result on hair, shadows, etc. It is very sensitive, and often forms multiple peaks or troughs in the projection curve, so the calculation error will inevitably increase in the actual calculation process, resulting in a decrease in positioning accuracy

If the eye area of ​​the face image is disturbed by forehead hair, even if the forehead hair is rare and the interference is very light, it will directly cause many valleys in the projection result, which makes it very difficult to determine the pupil position.

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