An image processing apparatus for removing block distortion comprises an area specifying unit 103 for specifying a block distortion area to remove the block distortion therefrom in a reconstructed image decoded from a compressed data, and a block distortion area noise removing unit 104 for removing the noise from the block distortion area. The present invention provides a warp knit consisting of a technical face, a rear face, and an intermediate spacer arranged between the technical face and the rear face, the technical face consisting of ultra fine yarn with monofilament denier of 0. The present blends exhibit reduced color formation, a high level of whitenessbrightness and acceptably low haze formation upon heat treatment. A pair of spaced apart electrodes in electrical contact with the film apply a linear voltage gradient along the film.