Abstract: In order to obtain radial uniform luminance and increase the effective numbers of voxels for volumetric 3D display based on projection, a voxelization and homogenization method is proposed.Regarding the problem of high luminance of voxels near central axis, the cause of excessive loss of voxels in the existing sampling methods is analyzed.By replacing three-dimensional sampling with two-dimensional plane-filling algorithm, the voxelization method in radial extent filling is proposed.Homogenization method based on dithering technique is proposed, which helps to correct voxel luminance distortion in cylindrical space.Demonstrated in the experiments, about 60% of the display resolution is retained and the effective voxel number reaches 200million.The volumetric 3D display prototype is able to show clear and uniform stereo images with all viewing angles under the condition of indoor light.