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ADAPTIVE ALGORITHM FOR IMAGE CONTRAST ESTIMATION | ||
| AL-TAQANI | ||
| Article 1, Volume 20, Issue 1, 2007, Pages 52-61 | ||
| Author | ||
| Ayten Noori Hussian Al-Bayati | ||
| Abstract | ||
| Image contrasts measuring globally is not efficient tool to estimate image visibility and separate image targets. So in this study we suggest a new algorithm to estimate image contrast by determining the contrast at image edges , where the contrast highly appears in image edge points (i.e. between the pixels of two targets (dark and bright targets)). Also, we study the relation between estimated contrast and the gray levels dynamic range (radiometric resolution), and smoothing process (spatial resolution). It is concluded that the contrast decreases with increasing of number of smoothing iterations and with reduced gray levels dynamic range (i.e. the contrast is reduced with reducing spatial and radiometric resolutions). | ||
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