  The emerging and existing light field displays are highly capable of
realistic presentation of 3D scenes on auto-stereoscopic glasses-free
platforms. The light field size is a major drawback while utilising 3D displays
and streaming purposes. When a light field is of high dynamic range, the size
increases drastically. In this paper, we propose a novel compression algorithm
for a high dynamic range light field which yields a perceptually lossless
compression. The algorithm exploits the inter and intra view correlations of
the HDR light field by interpreting it to be a four-dimension volume. The HDR
light field compression is based on a novel 4DDCT-UCS (4D-DCT Uniform Colour
Space) algorithm. Additional encoding of 4DDCT-UCS acquired images by HEVC
eliminates intra-frame, inter-frame and intrinsic redundancies in HDR light
field data. Comparison with state-of-the-art coders like JPEG-XL and HDR video
coding algorithm exhibits superior compression performance of the proposed
scheme for real-world light fields.
