Low-complexity <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si354.svg" display="inline" id="d1e1575"><mml:msub><mml:mrow><mml:mi>ℓ</mml:mi></mml:mrow><mml:mrow><mml:mi>∞</mml:mi></mml:mrow></mml:msub></mml:math>-compression of light field images with a deep-decompression stage