||Kopilovic, I., Szirányi, T.
||Non-linear scale selection for image compression improvement obtained by perceptual distortion criteria
||The effect of linear and non-linear diffusions prior to
Joint Photographic Experts Group’s (JPEG) standard
baseline compression is analysed and compared. We shall
show that anisotropic diffusion acts as an adaptive
filtering that extracts and preserves the important visual
information, and it will be shown how it can be used as a
preprocessing method for compression artefact reduction.
The selection of the appropriate preprocessing
parameters at a specified bit rate greatly reduces the
compression artefacts. The selection criteria were
determined using a perceptual error metric based on a
model of the human visual system.