papers

Region of interest high resolution reconstruction for display purposes and a novel bookmarking capabi

The present technique addressably handles image data, which is decomposed and tessellated into a plurality of tessellated sub-band blocks. The tessellated sub-band blocks may be addressed by an array of indices, which identify specific data blocks of the image data by decomposition level and spatial coordinates of the ...

Parametric modelling of non-stationary signals: a unified approach

Modelling of non-stationary signals by time-dependent ARMA model is investigated in this paper. It is shown that a meaningful classification of general time-dependent ARMA model is possible according to time functions of the system poles. Complex exponential, AM, FM, etc. models are shown to be special cases of time-de...

Performance metrics for image contrast

In this paper, contrast level of the images are quantified by the two proposed metrics. These metrics are Histogram Flatness Measure (HFM) and Histogram Spread (HS). Computation of these metrics is based on the shape of the histogram. Extensive simulation results reveal that HS is more meaningful than HFM. Low contrast...