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Enhancement of Face Recognition Rate by Data Base Pre-processing

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Figure

Figure 4. Block diagram of Homomorphic filtering
Figure 5. The proposed face image enhancement and recognition block diagram
Fig 8: (a) is the original image in ORL database (b) is the contrast stretched image (c) is the graph between the input pixel to the output pixel of  contrast stretching (d) and (e) are the histograms of original image and contrast stretched images respect
Fig 11: (a) is the contrast stretched image in ORL database of (a); (b) is the natural logarithm on the image; (c) is the fourier transform of (b); (d) is the Homomorphic filter of (c); (e) is the inverse fourier transform of (d) and ;(f) is the Homomorphi
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