3D IMAGE CORRECTION METHOD FOR TIME OF FLIGHT CAMERAS

The correction of 3D images captured with the Time of Flight (ToF) camera is performed by placing at different distances, in the scene, two high contrast tags. The distance images captured with ToF cameras are distorted by the scattered light inside the camera body (flare light). The two captured images with a ToF camera are in fact a vector image. The vector's amplitude gives the amplitude image and the vector's phase is used to compute the distance image. This vector image affected by the flare light can be corrected by subtracting from it the flare light component. The average value of the flare light can be computed using two tags placed at different distances in the scene, and the image is corrected only in the neighborhood regions of these tags. The vector image is corrected by subtracting from it the average flare light component. This correction method gives good results because the flare light component has a slow spatial variation.