Image Enhancemen1 - orthogonal to the ridges(Operations...

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Image Enhancement Noise in the fingerprint image is due to: dry or wet skin, dirt, cut, worn, noise of the capture device. Image enhancement operations: (i) Local area contrast enhancement . (ii) Contextual filtering that provides a lowpass effect along the ridge direction and performs a bandpass effect in a direction
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Unformatted text preview: orthogonal to the ridges. (Operations include calculation of ridge frequency and orientation field .) Estimation of orientation field (gradient method, slit-sums, etc.). Segmentation: Separation of foreground from background....
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