Range imaging based on moving pattern light and spatio-temporal matched filter

Aa new structured light projection method for measuring 3D and range objects is proposed. The method projects a moving structured light pattern modulated by a time-compression signal, then the objects are captured as a dynamic and spatio-temporal image by a camera. By applying a matched filter to the spatio-temporal image, the ideal slit light is realized even using an actual light projector. According to the extracted slit light and triangulation principle, 3D geometric information of the objects scene are obtained more accurately. By using separable signals which have no correlation with each other, the method is able to project multiple light patterns at different positions simultaneously. It solves the occlusion problem due to a single projector. Some experimental results show its advantages