Devices and techniques are described for validation of depth data. A first pattern and second pattern may be projected. A first image of the first pattern and a second image of the second pattern may be captured. A first code word may be determined for a first pixel address based on a first value of the first pixel address in the first pattern and a second value of the first pixel address in the second pattern. A third pattern may be projected. A second code word may be determined for the first pixel address based on a third value of the first pixel address in the third pattern and the second value of the first pixel address in the second pattern. A confidence value of the first pixel address may be assigned based on the first code word and the second code word corresponding to the same projector column.