Patent ID: 6445828
Filing Date: 2002-09-03
Classification: G06T,H04N

Abstract:
A method of resizing a spatial domain image represented in a transform domain by a plurality of transform domain blocks, comprising the steps of:(A) obtaining from said plurality of transform domain. blocks, a first transform domain block that represents in said transform domain a plurality of pels reordered in a field format in said spatial domain image; (B) resizing said first transform domain block by operating upon said first transform domain block in said transform domain, said resizing including the steps of: (B1) obtaining a first resizing matrix that is based upon C8&it;Sf1/2&it;V&it;â€ƒ[C8100C81],â€ƒwherein C8 represents an 8Ã—8 DCT matrix, and SfÂ½v represents an 8Ã—16 vertical downsampling matrix that downsamples reordered pels represent by said first transform domain block by a factor of two; and (B2) obtaining a second resizing matrix that is based upon C8&it;S1/2&it;h&it;â€ƒ[C8100C81],â€ƒwherein SÂ½h represents an 8Ã—16 downsampling matrix; and (B3) multiplying said first resizing matrix, said first transform domain block, and said second resizing matrix together to obtain a resized transform domain block having different resolution than said first transform domain block.