| 摘要 |
<p>The present invention relates to a computer-implemented method and apparatus for representing data. There is also disclosed a computerised method and apparatus for creation of a portion of an image (30) from the representation data of the image. The method of representing data involves dividing the data into a plurality of regions (6;32 to 35), wherein each region contains a first portion of said data; and then for each of said regions, performing the steps of: determining a mapping from a second portion (5) of said data to said first portion of the current region to minimise an error measure (ERRORMIN), wherein said second portion of said data includes said current region so that said current region is positioned within said second portion of said data; storing said mapping as a representation of said current region if said error measure (ERRORMIN) is below a predetermined threshold; and recursively applying the steps of said method to said current region if said error measure (ERRORMIN) is greater than or equal to said predetermined tolerance. The computerised method for creation of a portion (112) of an image (110) from representation data of the image, comprises the steps of: selecting a region (112) of an arbitrary image corresponding to said portion of said image; determining subsample data (111) of the representation data, wherein upon decompression the subsample data includes at least said portion of said image so that said portion of said image is positioned within said subsample data; and decompressing said subsample data.</p> |
