Patent ID: 9596478
Date: 2017-03-14
CPC Classifications: H04N

Claim:
1. An image compressing/decompressing apparatus, comprising: an offset calculating unit that performs an offset process for a luma plane and/or chroma planes, the offset process compressing a pixel value range by a predetermined offset except for a saturation value; a compression processing unit that performs a lossy compression process using frequency conversion for the luma plane and the chroma planes after the offset process performed by the offset calculating unit; a decompression processing unit that decompresses compressed data generated in the compression process performed by the compression processing unit to a luma plane and chroma planes; and an inverse offset calculating unit that performs an inverse offset process for a plane for which the offset process has been performed among the luma plane and the chroma planes after decompression by the decompression processing unit, the inverse offset process expanding a pixel value range by the offset; wherein the offset calculating unit performs the offset process for only the luma plane; and the inverse offset calculating unit performs the inverse offset process for only the luma plane.