| Distance Transform Based Enhancement for Linear Interpolated Images |
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| 作者姓名： | 唐莉萍 曾培峰 |
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| 作者单位： | School of Information Science and Technology，Donghua University，Shanghai，200051，School of Information Science and Technology，Donghua University，Shanghai，200051 |
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| 摘 要： | An approach of distane map based imageenhancement (DMIE) is proposed. It is applied toconventional interpolations to get sharp images. Edgedetection is performed after images are interpolatedby linear interpolations. To meet the two conditionsset for DMIE, i. e., no abrupt changes and no over-boosting, different boosting rate should be used inadjusting pixel intensities. When the boosting rate isdetermined by using the distance from enhancedpixels to nearest edges, edge-oriented imageenhancement is obtained. By using Erosion
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| 关 键 词： | interpolation edge detection Euclidean distance transform B-spline。image enhancement |
Distance Transform Based Enhancement for Linear Interpolated Images |
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| TANG Li-ping,ZENG Pei-feng
School of Information Science and Technology,Donghua University,Shanghai.Distance Transform Based Enhancement for Linear Interpolated Images[J].Journal of Donghua University,2003,20(1). |
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| Authors: | TANG Li-ping ZENG Pei-feng
School of Information Science and Technology Donghua University Shanghai |
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| Institution: | School of Information Science and Technology,Donghua Uniaersity,Shanghai,200051 |
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| Abstract: | An approach of distane map based imageenhancement (DMIE) is proposed. It is applied toconventional interpolations to get sharp images. Edgedetection is performed after images are interpolatedby linear interpolations. To meet the two conditionsset for DMIE, i. e., no abrupt changes and no over-boosting, different boosting rate should be used inadjusting pixel intensities. When the boosting rate isdetermined by using the distance from enhancedpixels to nearest edges, edge-oriented imageenhancement is obtained. By using Erosion technique,the range for pixel intensity adiustment is set.Over-enhancement is avoided by limiting the pixel iutensities in enhancement within the range. A unifled linear-time algoritiml for disance transform is adopted to deal with the calculation of Euelidean distance of the images.Its computation complexity is 0(N).After the preparation,i.e.,distance transforming and erosion,the images get more and more sharpened while no over.boosting.Occurs by repeating the enhancement procedure ,The simplicity of the enhancement operation makes DMIE suitable for enhancement rate adjusting |
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| Keywords: | interpolation edge detection Euclidean distance transform B-spline image enhancement |
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