Resampling of an Image by Block-Based Interpolation or Decimation with Compensation

Due to multiple standards on digital coding of image it is expectedthat conversion from one picture format to another will be quitenecessary for display or recording of different format sources.Conventional approach of 2-D sampling rate conversion by polyphasefilters requires relatively large memory and computational power.Therefore, a new efficient method for image resampling has beenpresented. The proposed approach performs resampling block by blockwith overlap. To minimize the overlap special block interpolationkernels are used, with one pixel overlap gives satisfactory result formost of practical images. Proposed method can be efficiently applied toimage communication systems where block transforms are used for datacompression.