Generally, there is a depth of field (DOF) constraint for each kind of auto-stereoscopic display owing to the limited angular resolution, which restricts the depth of display. Device-specific blurring will occur if the depth of object exceeds the DOF boundary. A novel depth-perception preserved three-dimensional (3D) content remapping method is presented to meet the DOF constraint of a target 3D display, by using a nonlinear global operation followed with local depth contrast recovery. Apparent depth is dominated by the distribution of depth contrast rather than an absolute depth value. The framework can be divided into two steps. Firstly, a nonlinear operation is adopted to remap the reference depth map of image to fit into the DOF limitation. Secondly, the depth contrast is recovered by decomposing the reference and remapped depth map into multi-frequency bands, calculating the difference for each band, and then the remapped depth map is used to add the scaled difference of depth map of top levels' frequency bands. A warping-based view synthesis method is adopted to retarget the light field according to the modified depth map. The experimental results show that the modified light field is sharp while the original perception of depth is maximally preserved.
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